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All questions of Chapter Notes & Tests for Class 7 Exam

What is the purpose of the Caps Lock key on a keyboard?
  • a)
    It moves the cursor to the next tab stop.
  • b)
    It deletes the character to the left of the cursor.
  • c)
    It toggles between lowercase and uppercase letters.
  • d)
    It temporarily pauses the action of an application program.
Correct answer is option 'C'. Can you explain this answer?

Subham Iyer answered
The purpose of the Caps Lock key on a keyboard is to toggle between lowercase and uppercase letters.

Introduction:

The Caps Lock key is a key found on most computer keyboards, typically located on the left side of the keyboard, above the Shift key. When pressed, it changes the input mode of the keyboard, allowing the user to type in uppercase letters without the need to hold down the Shift key.

Explanation:

The Caps Lock key serves a specific purpose in typing and text entry. When the Caps Lock key is pressed, it activates a "lock" mechanism that changes the behavior of the keyboard. Instead of typing lowercase letters, the user will now type uppercase letters regardless of whether the Shift key is pressed or not. This means that every letter typed will be automatically capitalized until the Caps Lock key is pressed again to deactivate it.

Usage and Benefits:

The Caps Lock key can be useful in various scenarios, such as:
- Typing in all capital letters: When writing titles, headings, or acronyms, using the Caps Lock key saves time and effort by allowing the user to type in uppercase continuously without holding down the Shift key for each letter.
- Passwords: Many passwords require a combination of uppercase and lowercase letters. By activating the Caps Lock key, the user can easily type the required uppercase characters without manually holding down the Shift key for each letter.
- Visual indication: The Caps Lock key often has a built-in indicator light that shows whether it is active or not. This provides a visual cue to the user, helping them confirm the current typing mode.

Conclusion:

The Caps Lock key on a keyboard serves the purpose of toggling between lowercase and uppercase letters. It provides convenience when typing in all capital letters, entering passwords, and visually indicating the current typing mode.

What is the primary purpose of data processing in a computer?
  • a)
    To convert information into data.
  • b)
    To display the results of mathematical operations.
  • c)
    To convert data into meaningful information.
  • d)
    To instruct the computer.
Correct answer is option 'C'. Can you explain this answer?

Anagha Nambiar answered
Primary Purpose of Data Processing in a Computer:

Converting Data into Meaningful Information:
- The primary purpose of data processing in a computer is to convert raw data into meaningful information that can be used for decision-making, analysis, and other purposes.
- Computers take in raw data, process it using algorithms and software, and output information that can be easily understood and utilized by users.

Organizing and Analyzing Data:
- Data processing involves organizing and analyzing data to extract useful insights and patterns.
- This process helps in making informed decisions, identifying trends, and solving complex problems.

Improving Efficiency and Accuracy:
- Data processing in a computer helps in improving the efficiency and accuracy of tasks that involve handling large amounts of data.
- Computers can process data much faster and with greater precision than humans, reducing the chances of errors and improving overall productivity.

Enabling Automation:
- Data processing enables automation of repetitive tasks, freeing up human resources for more strategic and creative work.
- Computers can perform routine data processing tasks such as data entry, calculations, and analysis, allowing organizations to operate more efficiently.
In conclusion, the primary purpose of data processing in a computer is to convert raw data into meaningful information that can be used for decision-making, analysis, and automation. It plays a crucial role in organizing, analyzing, and transforming data into valuable insights that drive business operations and decision-making processes.

Which gate is known as a universal gate because it can be used to build any other gate?
  • a)
    OR gate
  • b)
    NAND gate
  • c)
    NOT gate
  • d)
    AND gate
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
The NAND gate is known as a universal gate because it can be used to build any other gate, making it a versatile building block in electronics.

What is the primary purpose of a programming language?
  • a)
    To communicate with humans
  • b)
    To communicate with computers
  • c)
    To write poetry
  • d)
    To create artwork
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
The primary purpose of a programming language is to communicate instructions to computers in a way that they can understand and execute. It is a means by which programmers give directions to computers.

What is the primary purpose of an assembler in programming?
  • a)
    To execute the program
  • b)
    To translate assembly code to machine code
  • c)
    To write the program
  • d)
    To debug the program
Correct answer is option 'B'. Can you explain this answer?

Deepa bajaj answered
Understanding the Role of an Assembler
The primary purpose of an assembler in programming is to translate assembly code to machine code. This process is crucial for executing programs on a computer.
What is Assembly Code?
- Assembly code is a low-level programming language that is closely related to machine code.
- It uses mnemonics and symbols to represent machine-level instructions, making it more understandable for humans.
What is Machine Code?
- Machine code is the set of binary instructions that a computer's CPU can directly execute.
- It consists of binary digits (0s and 1s) and is not easily readable by humans.
Key Functions of an Assembler
- Translation: The assembler converts assembly language instructions into machine code, allowing the CPU to understand and execute them.
- Symbol Resolution: It resolves symbolic addresses used in assembly code to actual memory addresses in machine code.
- Error Checking: Assemblers often check for syntax errors in the assembly code and provide feedback to the programmer.
Why is this Important?
- Without an assembler, programmers would have to write in machine code, which is complex and error-prone.
- The assembler acts as a bridge between human-readable code and machine-executable code, enhancing productivity in software development.
In summary, the assembler's primary purpose is to translate assembly code into machine code, making it a vital tool in the programming process.

What does the term "Peripherals" refer to in the context of computers?
  • a)
    Computer programming languages
  • b)
    Input devices like keyboards and mice
  • c)
    Software applications
  • d)
    Computer memory types
Correct answer is option 'B'. Can you explain this answer?

Bhavana Bajaj answered
Peripherals in Computers

Peripherals refer to external devices that are connected to a computer to provide additional functionality or input/output capabilities. In the context of computers, peripherals typically include input devices like keyboards and mice, as well as output devices like monitors and printers.

Key Points:

  • Input Devices: Peripherals such as keyboards and mice are used to input data into the computer. Keyboards are essential for typing text, while mice are used for pointing and clicking on objects on the screen.
  • Output Devices: Peripherals like monitors and printers are used to display information or produce physical copies of documents. Monitors display visual output, while printers create hard copies of documents.
  • Other Peripherals: In addition to input and output devices, peripherals can also include storage devices like external hard drives, networking devices like routers, and audio devices like speakers or headphones.
  • Expansion Cards: Some peripherals come in the form of expansion cards that are inserted into the computer's motherboard to add functionality, such as graphics cards for improved video performance.


Overall, peripherals play a crucial role in expanding the capabilities of a computer system and enhancing the user experience by providing additional input/output options.

What is the base of the Decimal Number System?
  • a)
    2
  • b)
    8
  • c)
    10
  • d)
    16
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
The base of the Decimal Number System is 10, and it consists of ten digits from 0 to 9.

Which of the following is not a type of mouse mentioned in the text?
  • a)
    Optical Mouse
  • b)
    Cordless Mouse
  • c)
    Laser Mouse
  • d)
    Mechanical Mouse
Correct answer is option 'C'. Can you explain this answer?

The text describes three types of mice: Mechanical Mouse, Optical Mouse, and Cordless Mouse. However, it does not mention a "Laser Mouse," making Option C the correct answer.

What is the main advantage of EEPROM (Electrically Erasable Programmable ROM) over EPROM (Erasable Programmable ROM)?
  • a)
    EEPROM is faster
  • b)
    EPROM can be electrically erased
  • c)
    EEPROM does not require UV light for erasing
  • d)
    EPROM can be reprogrammed multiple times
Correct answer is option 'C'. Can you explain this answer?

Rajveer Chavan answered
Advantage of EEPROM over EPROM:

c) EEPROM does not require UV light for erasing.

Explanation:

EEPROM (Electrically Erasable Programmable ROM) and EPROM (Erasable Programmable ROM) are both types of non-volatile memory that can be electrically programmed and erased. However, there is a significant advantage that EEPROM has over EPROM.

1. Erasing Method:
- EEPROM: EEPROM can be electrically erased, which means that the data stored in it can be erased using electrical signals. This erasing process does not require the use of UV (Ultraviolet) light.
- EPROM: EPROM, on the other hand, requires exposure to UV light for erasing. The EPROM chip has a quartz window on top that allows UV light to penetrate and erase the stored data. This process can be time-consuming and inconvenient as it requires the chip to be removed from the circuit and exposed to UV light.

2. Ease of Use:
- EEPROM: The electrical erasing method of EEPROM makes it much more convenient and user-friendly. The erasing process can be performed while the chip is still in the circuit, without the need for any additional equipment or exposure to UV light.
- EPROM: In contrast, EPROM requires additional steps to erase the data. The chip needs to be physically removed from the circuit, exposed to UV light for a specified duration, and then reinstalled. This process can be time-consuming and prone to errors if not done correctly.

3. Flexibility:
- EEPROM: The electrical erasing method of EEPROM allows for individual byte or word erasing. This means that specific data can be erased without affecting the rest of the stored information. It provides more flexibility in terms of modifying or updating data.
- EPROM: In EPROM, the entire chip needs to be erased, which means that all the stored data is erased simultaneously. This lack of flexibility makes EPROM less suitable for applications that require frequent updates or modifications.

In conclusion, the main advantage of EEPROM over EPROM is that EEPROM does not require UV light for erasing. The electrical erasing method of EEPROM makes it more convenient, user-friendly, and flexible compared to EPROM, which requires physical removal from the circuit and exposure to UV light for erasing the data.

Which of the following best describes computer software?
  • a)
    Physical components of a computer system.
  • b)
    Sequences of instructions for the computer.
  • c)
    Hardware resources used by applications.
  • d)
    The interface between the user and the hardware.
Correct answer is option 'B'. Can you explain this answer?

Alpana reddy answered
Introduction:
Computer software refers to a collection of programs, data, and instructions that tell a computer how to perform specific tasks. It is a vital component of a computer system and enables users to interact with the hardware and perform various functions. Among the given options, option B best describes computer software.

Sequences of instructions for the computer:
Computer software consists of sequences of instructions that are written in a programming language. These instructions are designed to be executed by the computer's hardware. The software instructs the computer on what actions to take, how to process data, and how to perform specific tasks. Instructions can include mathematical calculations, logical operations, input/output operations, and more.

Programs and applications:
Software can be categorized into different types, such as system software and application software. System software includes the operating system, device drivers, and utility programs that provide a platform for other software to run on. Application software, on the other hand, includes programs designed for specific tasks, such as word processing, spreadsheet management, graphic design, and gaming.

Controlling computer hardware:
Computer software serves as an intermediary between the user and the computer hardware. It provides a user-friendly interface that allows users to interact with the computer system without needing to understand the low-level details of the hardware. Through software, users can input commands, manipulate data, and receive output from the computer.

Execution and performance:
Software is responsible for managing the resources of a computer system, including memory, storage, and processing power. It ensures efficient execution of instructions, proper allocation of resources, and coordination between different components of the system. Software also enables multitasking, allowing multiple programs to run simultaneously and share resources.

Conclusion:
In conclusion, computer software is a collection of programs and instructions that enable a computer system to perform specific tasks. It serves as an interface between the user and the hardware, providing a platform for executing instructions, managing resources, and facilitating user interaction. Therefore, option B, which describes software as sequences of instructions for the computer, is the best choice among the given options.

What is the primary purpose of SQL (Structured Query Language)?
  • a)
    Creating dynamic web pages
  • b)
    Interacting with databases
  • c)
    Writing system software
  • d)
    Programming microprocessors
Correct answer is option 'B'. Can you explain this answer?

Shikha rao answered
The primary purpose of SQL (Structured Query Language) is to interact with databases. SQL is a programming language that is specifically designed for managing and manipulating relational databases. It provides a standardized way to communicate with databases and perform various operations such as querying data, inserting, updating, and deleting records.

Interaction with Databases:
SQL allows users to interact with databases by executing queries and commands to retrieve and manipulate data. It provides a set of commands and syntax that enable users to perform tasks like creating databases, tables, and views, defining relationships between tables, and retrieving specific data based on certain conditions.

Querying Data:
One of the main purposes of SQL is to query data from databases. With SQL, users can write queries that specify the criteria for retrieving data from one or more tables. These queries can be simple or complex, involving various conditions, sorting, grouping, and aggregating data.

Manipulating Data:
SQL also allows users to manipulate data in databases. It provides commands for inserting new records into tables, updating existing records, and deleting unwanted records. These commands enable users to modify the data stored in the database according to their requirements.

Data Definition:
In addition to querying and manipulating data, SQL also supports data definition operations. Users can use SQL commands to create databases, define tables and their structure, set constraints, establish relationships between tables, and define views. These operations help in organizing and structuring the data stored in the database.

Database Administration:
SQL is widely used by database administrators for managing and administering databases. It provides commands for creating and managing user accounts, granting or revoking permissions, and controlling access to the database. SQL also offers features for backing up and restoring databases, optimizing performance, and monitoring database activities.

Conclusion:
In summary, the primary purpose of SQL is to interact with databases. It provides a standardized language for querying, manipulating, and managing data stored in relational databases. SQL is widely used in various applications and industries where efficient data management and retrieval are crucial.

What technological concept is the Fifth Generation of computers based on?
  • a)
    Parallel processing
  • b)
    Magnetic core memory
  • c)
    Use of transistors
  • d)
    Batch processing
Correct answer is option 'A'. Can you explain this answer?

Kiran Reddy answered
The Fifth Generation of computers is based on the concept of parallel processing, where multiple processors work together to solve complex problems. It also involves artificial intelligence (AI) technologies.

What was the main drawback of the ENIAC computer, which led to the introduction of the stored program concept?
  • a)
    Lack of processing speed
  • b)
    Limited memory capacity
  • c)
    Inability to perform arithmetic operations
  • d)
    Requirement of rewiring for program changes
Correct answer is option 'D'. Can you explain this answer?

The main drawback of the ENIAC computer was its requirement for rewiring to change the program. This limitation was overcome with the introduction of the "stored program concept," which allowed programs to be stored in memory and easily modified.

Which gate performs logical multiplication?
  • a)
    OR gate
  • b)
    AND gate
  • c)
    NOT gate
  • d)
    NOR gate
Correct answer is option 'B'. Can you explain this answer?

Rashi iyer answered
AND Gate
An AND gate is a digital logic gate that performs logical multiplication. It has two inputs and one output. The output of an AND gate is true only when both inputs are true. If any of the inputs is false, the output will also be false.

Functionality
- When both input A and input B are true, the output of the AND gate is true.
- If either input A or input B is false, the output will be false.
- The AND gate follows the rule that it requires all inputs to be true for the output to be true, making it perform logical multiplication.

Symbol
The symbol for an AND gate is a basic rectangle with a small circle at the output point and inputs labeled as A and B.

Truth Table
- Input A | Input B | Output
- 0 | 0 | 0
- 0 | 1 | 0
- 1 | 0 | 0
- 1 | 1 | 1

Application
AND gates are widely used in digital electronics and are fundamental building blocks for more complex circuits. They are used in circuits where a certain output is desired only when multiple conditions are met simultaneously.
In conclusion, the AND gate is the logic gate that performs logical multiplication by requiring all inputs to be true for the output to be true.

What is the primary function of the Presentation Layer in the OSI model?
  • a)
    Controlling session establishment
  • b)
    Formatting data for the application layer
  • c)
    Transmitting data frames between nodes
  • d)
    Providing error-free data transfer
Correct answer is option 'B'. Can you explain this answer?

The primary function of the Presentation Layer in the OSI model is to format and transform data into a compatible form for the application layer. It is the sixth layer in the OSI model and is responsible for ensuring that the data sent by the application layer is properly formatted so that it can be understood by the receiving application.

The Presentation Layer performs several important tasks to achieve this formatting and transformation:

1. Data Translation: The Presentation Layer converts data from the application layer into a standard format that can be understood by the receiving application. This includes converting between different character sets, such as ASCII and Unicode, and encoding schemes, such as Base64.

2. Data Encryption and Decryption: The Presentation Layer can encrypt data before transmission to ensure its confidentiality. It also decrypts encrypted data received from the network, allowing the application layer to access the original data.

3. Data Compression: The Presentation Layer can compress data to reduce the amount of data that needs to be transmitted over the network. This helps to optimize bandwidth usage and improve overall network performance.

4. Data Formatting: The Presentation Layer ensures that the data is properly formatted for transmission. This includes adding necessary headers, footers, and formatting information that may be required by the application layer.

5. Data Syntax Checking: The Presentation Layer checks the syntax and structure of the data to ensure that it is valid and can be correctly interpreted by the receiving application. This helps to prevent errors and ensure the integrity of the data.

By performing these tasks, the Presentation Layer ensures that the data transmitted by the application layer is compatible with the receiving application and can be successfully understood and processed. It acts as a bridge between the application layer and the lower layers of the OSI model, ensuring seamless communication between different systems and networks.

Which Windows version brought the first-ever Start button and Start menu?
  • a)
    Windows 1
  • b)
    Windows 3
  • c)
    Windows 95
  • d)
    Windows 98
Correct answer is option 'C'. Can you explain this answer?

Rimjhim bajaj answered
The correct answer is option 'C' - Windows 95.

Explanation:
-------------------
Windows 95 was a major milestone in the history of Microsoft Windows operating systems. It introduced several significant features, one of which was the first-ever implementation of the Start button and Start menu.

1. Introduction of the Start button:
--------------------------------------------
Windows 95 was released on August 24, 1995, and it replaced the previous Program Manager interface with a new user interface. One of the key elements of this new interface was the addition of the Start button, which was located in the bottom-left corner of the screen. The Start button was a graphical representation of the Windows logo and was designed to provide quick access to various features and functions of the operating system.

2. Functionality of the Start menu:
---------------------------------------
When the Start button was clicked, it opened up the Start menu. The Start menu was a hierarchical menu that allowed users to access programs, settings, and files on their computer. It provided a centralized location for launching applications, accessing system utilities, and navigating the file system.

The Start menu consisted of several key components:
- Programs: This section displayed a list of installed programs, allowing users to launch applications by selecting them from the menu.
- Documents: Here, users could find recently accessed documents, making it convenient to open frequently used files.
- Settings: This section provided access to various system settings, such as control panel options, printers, and network configurations.
- Search: The Start menu also included a search feature that allowed users to search for files, folders, and applications on their computer.
- Help and Shutdown: These options provided assistance and allowed users to shut down or restart their computer.

The introduction of the Start button and Start menu in Windows 95 revolutionized the way users interacted with the operating system. It provided a more user-friendly and efficient way to access applications and system functions, making it easier for users to navigate and utilize the features of Windows.

What does the abbreviation "PDF" stand for in the context of document file formats?
  • a)
    Portable Data Format
  • b)
    Personal Document File
  • c)
    Print Document Format
  • d)
    Portable Document Format
Correct answer is option 'D'. Can you explain this answer?

Niti menon answered

Portable Document Format (PDF)

Portable Document Format (PDF) is a file format used to present and exchange documents reliably, independent of software, hardware, or operating systems. PDF files can contain text, images, links, buttons, form fields, audio, video, and more. Here is a breakdown of the abbreviation "PDF":

Portable
- The term "portable" in PDF refers to the fact that PDF documents can be opened and viewed on any device or operating system without losing formatting or layout. This makes PDFs versatile and widely accessible.

Document
- PDF is primarily used for creating and sharing documents, such as reports, manuals, forms, and ebooks. It is a popular format for businesses, educational institutions, and individuals due to its reliability and consistency.

Format
- The term "format" signifies that PDF files are structured in a specific way to preserve the original content and layout of the document. This ensures that the document looks the same regardless of where or how it is viewed.

Therefore, the correct expansion of the abbreviation "PDF" in the context of document file formats is Portable Document Format.

Which layer of the OSI model is responsible for ensuring error-free data transmission and managing data frames between nodes?
  • a)
    Data Link Layer
  • b)
    Transport Layer
  • c)
    Presentation Layer
  • d)
    Network Layer
Correct answer is option 'A'. Can you explain this answer?

Kiran Reddy answered
The Data Link Layer in the OSI model is responsible for ensuring error-free data transmission between nodes on the same network segment. It manages data frames, error detection, and flow control to ensure reliable communication between devices. This layer ensures that data is delivered without errors or duplications within a local network.

Which component of a personal computer is often referred to as the "brain" and controls the operation of the computer?
  • a)
    Memory
  • b)
    Monitor
  • c)
    Microprocessor
  • d)
    Keyboard
Correct answer is option 'C'. Can you explain this answer?

The microprocessor, also known as the CPU, is often referred to as the "brain" of the computer. It controls the operation of the computer and executes commands and instructions.

What is the purpose of a compiler in programming?
  • a)
    To execute the program
  • b)
    To translate high-level code to machine code
  • c)
    To debug the program
  • d)
    To write the program
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
A compiler is a software tool used to translate high-level programming code into machine code that can be executed by a computer. It is essential for making high-level languages understandable to the computer.

What is the primary function of a computer's Central Processing Unit (CPU)?
  • a)
    Storing data
  • b)
    Displaying images
  • c)
    Performing arithmetic and logical operations
  • d)
    Printing documents
Correct answer is option 'C'. Can you explain this answer?

Uday Verma answered
The primary function of a computer's Central Processing Unit (CPU) is to perform arithmetic and logical operations. The CPU is often referred to as the "brain" of the computer because it carries out all the necessary calculations and decision-making processes.

The CPU consists of several components, including the Arithmetic Logic Unit (ALU) and the Control Unit (CU). The ALU is responsible for performing arithmetic operations such as addition, subtraction, multiplication, and division. It also performs logical operations such as comparisons and boolean operations. The CU, on the other hand, coordinates and manages the activities of the CPU, ensuring that instructions are executed in the correct sequence and that data is transferred between different components.

The CPU fetches instructions from the computer's memory and executes them one by one. These instructions can be simple calculations or complex operations that involve multiple steps. The CPU uses its ALU to perform these operations, manipulating data according to the instructions provided.

The CPU also plays a crucial role in controlling and coordinating the activities of other computer components. For example, it interacts with the memory to store and retrieve data, with the input/output devices to send and receive information, and with the operating system to manage resources and execute programs.

In summary, the primary function of a computer's CPU is to perform arithmetic and logical operations. It is responsible for executing instructions, manipulating data, and coordinating the activities of other computer components. Without a CPU, a computer would not be able to perform any calculations or process any information.

Which computer was the first to introduce the "stored program concept" to overcome the limitation of wired programs?
  • a)
    Pascaline
  • b)
    ENIAC
  • c)
    EDVAC
  • d)
    UNIVAC
Correct answer is option 'C'. Can you explain this answer?

The EDVAC (Electronic Discrete Variable Automatic Computer) was the first computer to introduce the "stored program concept." This concept allowed instructions and data to be stored in the computer's memory, providing flexibility in program execution.

What is the primary purpose of a web server in the context of the Internet?
  • a)
    To format web documents
  • b)
    To translate domain names to IP addresses
  • c)
    To provide error-free data transmission
  • d)
    To provide web content to browsers
Correct answer is option 'D'. Can you explain this answer?

Kiran Reddy answered
The primary purpose of a web server in the context of the Internet is to store and serve web content to web browsers and other clients. It receives requests from browsers, retrieves the requested web pages or files, and sends them back to the clients for display.

Which layer of the OSI model is responsible for controlling the establishment of sessions between processes on different stations?
  • a)
    Transport Layer
  • b)
    Network Layer
  • c)
    Session Layer
  • d)
    Data Link Layer
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
The Session Layer in the OSI model is responsible for controlling the establishment, management, and termination of sessions between processes on different stations. It ensures that data exchange between applications is synchronized and manages dialog control between devices.

What is the primary purpose of Data Communication?
  • a)
    Sending emails
  • b)
    Transmitting coded data between remote terminals and computer installations
  • c)
    Playing online games
  • d)
    Creating websites
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
Data Communication involves transmitting coded data between remote terminals and a centralized computer installation or between computer centers over established communication links, making Option B the correct answer.

Which of the following is a disadvantage of machine-level language?
  • a)
    It is easy to learn and program
  • b)
    It is machine-dependent
  • c)
    It is suitable for high-level tasks
  • d)
    It is widely used in modern programming
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
Machine-level language is machine-dependent, meaning it is specific to a particular computer architecture. Programs written in this language may not be easily transferred to other machines.

Which type of memory is considered the fastest but is also the smallest in size?
  • a)
    Cache Memory
  • b)
    RAM (Random Access Memory)
  • c)
    Hard Disk Drive
  • d)
    Optical Disk
Correct answer is option 'A'. Can you explain this answer?

Kiran Reddy answered
Cache memory is the fastest type of memory in a computer, but it is also relatively small in size. It is used to temporarily hold frequently used data to speed up processing.

What type of memory is characterized by its ability to retain data even when the power is turned off?
  • a)
    RAM (Random Access Memory)
  • b)
    Cache Memory
  • c)
    ROM (Read Only Memory)
  • d)
    Magnetic Disk
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
ROM, specifically Read Only Memory, is characterized by its ability to retain data even when the power is turned off. It stores hardwired instructions that the computer uses during the boot-up process.

What type of connection provides high-speed Internet connectivity over telephone lines using DSL technology?
  • a)
    PSTN
  • b)
    ISDN
  • c)
    Broadband
  • d)
    Wi-Fi
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
A broadband connection provides high-speed Internet connectivity over telephone lines using DSL (Digital Subscriber Line) technology. It offers faster data transmission compared to traditional dial-up connections like PSTN and ISDN.

What is the primary role of system software?
  • a)
    Provides specific functionality to the user.
  • b)
    Serves as an intermediary between hardware and applications.
  • c)
    Stores binary data on a computer's hard drive.
  • d)
    Manages computer hardware resources.
Correct answer is option 'B'. Can you explain this answer?

Kiran Reddy answered
System software primarily acts as an intermediary between computer hardware and application programs. It provides essential functions such as loading the operating system, managing hardware resources, and providing instructions for applications to use.

Which inventor is often referred to as the "father of modern computer" and designed the Analytical Engine?
  • a)
    Blaise Pascal
  • b)
    Joseph Marie Jacquard
  • c)
    Charles Babbage
  • d)
    Howard Aiken
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
Charles Babbage is often referred to as the "father of modern computer." He designed the Analytical Engine, a pioneering concept that laid the foundation for modern computers.

Which file format is commonly associated with images and supports lossless compression?
  • a)
    GIF
  • b)
    JPEG
  • c)
    PNG
  • d)
    BMP
Correct answer is option 'C'. Can you explain this answer?

Kiran Reddy answered
The PNG (Portable Network Graphics) file format is known for supporting lossless compression, making it suitable for high-quality images.

Chapter doubts & questions for Chapter Notes & Tests - Computer Science for Class 7 2025 is part of Class 7 exam preparation. The chapters have been prepared according to the Class 7 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.

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