Test: High Order Thinking Skills- 2 - Class 9 MCQ

Explanation:
The highest unit for memory is the Terabyte (TB). Here's a detailed explanation:
- Memory units are used to measure the capacity of storage devices such as hard drives, solid-state drives, and memory cards.
- There are several memory units, each representing a different order of magnitude.
- The smallest unit of memory is the Bit (b), which represents a single binary digit (0 or 1).
- The Kilobyte (KB) is the next unit and represents 1024 bytes (2^10 bytes).
- The Megabyte (MB) is the unit after kilobyte and represents 1024 kilobytes (2^20 bytes).
- The Gigabyte (GB) is the unit after megabyte and represents 1024 megabytes (2^30 bytes).
- The highest unit for memory is the Terabyte (TB), which represents 1024 gigabytes (2^40 bytes).
- Beyond the terabyte, there are even larger units such as the petabyte, exabyte, zettabyte, and yottabyte.
Therefore, the correct answer is option C:

Terabyte

.

Keyboard is an Input Device
The keyboard is an input device that allows users to input data into a computer system by pressing various keys. It is one of the most common and essential input devices used for text entry and command execution. Here's a detailed explanation of why the keyboard is considered an input device:
Definition of an Input Device:
An input device is any hardware component that allows users to provide data, commands, or instructions to a computer system.
Explanation:
- The keyboard is used to input text, numbers, and commands into a computer system.
- When a key is pressed on the keyboard, it sends an electrical signal to the computer, which then processes the input.
- The keys on a keyboard are mapped to specific characters or functions, allowing users to interact with software applications and operating systems.
- The keyboard can be connected to a computer via various interfaces such as USB, PS/2, or wireless connections.
- Modern keyboards may also include additional features such as multimedia keys, function keys, and specialized keys for gaming or specific software applications.
Key Points:
- The keyboard is an input device used to input data, commands, and instructions into a computer system.
- It allows users to interact with software applications and operating systems.
- When a key is pressed, it sends an electrical signal to the computer for processing.
- The keyboard can be connected to a computer via USB, PS/2, or wireless connections.
- Modern keyboards may include additional features for multimedia, gaming, and specialized applications.
In conclusion, the keyboard is classified as an input device because it enables users to input data and commands into a computer system.

VDU stands for

• Visual Display Unit (VDU): This is the correct answer. VDU refers to the display device used to visualize output from a computer or other electronic devices.


• Video Display Unit (VDU): This is the same as the correct answer, as video is a type of visual display.


• Visual Direct Unit (VDU): This is not the correct answer. There is no such term as "Visual Direct Unit" in the context of display devices.


• Visual Display Uniform (VDU): This is not the correct answer. "Visual Display Uniform" does not make sense in the context of display devices.

Explanation:

A VDU, or Visual Display Unit, is a term used to refer to the display device used to visualize output from a computer or other electronic devices. It is also commonly known as a Video Display Unit. The VDU allows users to view text, images, and videos generated by the computer or other devices.

The VDU typically consists of a screen or monitor and may include additional components such as a stand, buttons, and ports. It receives signals from the computer or device and converts them into visual information that can be seen by the user.

VDUs are essential components of computer systems and are used in various settings, including offices, homes, and educational institutions. They come in different sizes and types, such as CRT (Cathode Ray Tube) monitors, LCD (Liquid Crystal Display) monitors, and LED (Light Emitting Diode) monitors.

Overall, the term VDU stands for Visual Display Unit or Video Display Unit, and it is used to describe the display device used for visualizing output from electronic devices.

Answer:
Introduction:
Avast is an antivirus software that provides protection against malware, viruses, and other online threats. It is designed to detect and remove malicious software from a computer system, ensuring the security and privacy of the user's data.
Features of Avast:
- Real-time protection: Avast continuously monitors the computer system for any potential threats, scanning files, emails, and web pages in real-time to detect and remove malware.
- Malware detection and removal: Avast uses advanced algorithms and signature-based scanning to detect and remove various types of malware, including viruses, spyware, adware, and ransomware.
- Web protection: Avast blocks malicious websites and phishing attempts, protecting users from downloading harmful files or falling victim to online scams.
- Email protection: Avast scans incoming and outgoing emails for potential threats, preventing the spread of malware through email attachments or links.
- Firewall: Avast includes a built-in firewall that monitors network traffic and blocks unauthorized access, adding an extra layer of security to the user's system.
- Wi-Fi security: Avast identifies vulnerable Wi-Fi networks and provides recommendations to secure the connection, protecting users from potential threats while connected to public or unsecured networks.
- Automatic updates: Avast regularly updates its virus definitions and software to stay up-to-date with the latest threats and security vulnerabilities.
- Password manager: Avast offers a password manager feature that securely stores and generates strong passwords, ensuring the user's online accounts are protected.
Conclusion:
Avast is a comprehensive antivirus software that provides real-time protection against malware, viruses, and other online threats. Its features include malware detection and removal, web protection, email protection, firewall, Wi-Fi security, automatic updates, and password management. Using Avast helps to ensure the security and privacy of the user's computer system and data.

Answer:

The terms WAN, LAN, PAN, and MAN are all related to networks. Let's break down what each term means:

WAN:

• Stands for Wide Area Network.


• It is a network that covers a large geographical area, such as a city, country, or even multiple countries.


• Used to connect multiple LANs together.


• Examples include the internet, leased lines, and satellite connections.

LAN:

• Stands for Local Area Network.


• It is a network that covers a small geographical area, such as a home, office, or building.


• Used to connect devices within a limited area.


• Examples include Ethernet, Wi-Fi, and Bluetooth.

PAN:

• Stands for Personal Area Network.


• It is a network that connects devices within an individual's personal space.


• Typically used for personal devices like smartphones, tablets, and wearable devices.


• Examples include Bluetooth and USB connections.

MAN:

• Stands for Metropolitan Area Network.


• It is a network that covers a larger area than a LAN but smaller than a WAN.


• Usually used to connect multiple LANs within a city or metropolitan area.


• Examples include cable TV networks and city-wide Wi-Fi.

In conclusion, WAN, LAN, PAN, and MAN are all types of networks that serve different purposes based on the size and geographic coverage.

To determine the correct answer for this question, we need to understand the given information and the options provided.

Given information:
- It is not a wireless connection.
Options:
- Bluetooth
- Wi-Fi
- Modem
- Mouse
Now, let's analyze each option and determine if it is a wireless connection or not.
Option A: Bluetooth
- Bluetooth is a wireless technology used for short-range communication between devices.
- It allows devices to connect and communicate wirelessly.
Option B: Wi-Fi
- Wi-Fi is a wireless networking technology that allows devices to connect to a local area network (LAN) wirelessly.
- It enables internet access and various other network services.
Option C: Modem
- A modem is a device that connects a computer or router to an internet service provider (ISP) network.
- It can be used for both wired and wireless connections, but it is not inherently a wireless connection.
Option D: Mouse
- A mouse is a peripheral device used to interact with a computer.
- It is typically connected to the computer using a wired or wireless connection, but it is not primarily a wireless connection.
Conclusion:
Based on the given information and the analysis of each option, the correct answer is C: Modem. It is not a wireless connection.

Introduction:
A magnetic tape reader is a device used to read data stored on magnetic tape. It is an essential component of magnetic tape systems, which are commonly used for data storage and backup purposes. In this response, we will discuss the functionality and purpose of a magnetic tape reader and categorize it into the correct device category.
Magnetic Tape Reader as a Memory Storage Device:
- Magnetic tape readers are primarily used for reading data stored on magnetic tapes.
- Magnetic tapes are a type of memory storage medium that allows for large capacity data storage.
- The reader retrieves the stored information from the magnetic tape and transfers it to a computer or other devices.
Magnetic Tape Reader as an Input Device:
- An input device is used to input data or instructions into a computer system.
- Magnetic tape readers can be used as an input device when they are used to transfer data from magnetic tapes to a computer or other devices.
- The data read from the magnetic tape can be used as input for various applications or further processing.
Magnetic Tape Reader as an Output Device:
- An output device is used to present or display information processed by a computer system.
- Magnetic tape readers are not typically considered output devices as they are primarily used for reading data rather than displaying it.
- However, in certain scenarios, the read data can be directly outputted to a display device or used as input for another system, making the magnetic tape reader act as an output device indirectly.
Magnetic Tape Reader as a Processing Device:
- A processing device performs operations on data to produce meaningful results.
- Magnetic tape readers do not perform any processing functions on their own.
- They are used to retrieve data from magnetic tapes, which is then processed by a computer or other devices.
Conclusion:
Based on the functionality and purpose of a magnetic tape reader, it can be categorized as an input device since it is primarily used for reading data from magnetic tapes and transferring it to a computer or other devices.

CU is the Control Unit.

The Control Unit (CU) is an essential component of a computer's central processing unit (CPU) that manages and coordinates the execution of instructions. It is responsible for directing the flow of data and instructions between the different hardware components of a computer system.

Key points about the Control Unit (CU):
- The CU fetches instructions from memory and decodes them to determine the necessary actions to be performed.
- It controls the flow of data between the CPU and other hardware components, such as the memory and input/output devices.
- The CU sends control signals to the arithmetic logic unit (ALU) and other functional units to execute instructions.
- It ensures the synchronization of various operations within the CPU and coordinates the timing of instruction execution.
- The CU also manages the allocation of system resources and handles interrupts and exceptions.
- It plays a crucial role in the overall performance and functionality of a computer system.
In conclusion, CU stands for Control Unit, which is responsible for managing and coordinating the execution of instructions within a computer's CPU. It controls the flow of data and instructions between different hardware components and ensures the synchronization of operations within the CPU.

Introduction:
A raster graphic is a type of digital image that is made up of pixels, which are small individual units of color. These pixels come together to form the entire image. Let's delve into the details of what a raster graphic is made of.
Explanation:
A raster graphic is made of:
- Pixels: Pixels are the smallest unit of information in a raster graphic. They are tiny squares or dots of color that make up the image. Each pixel has its own color value, which determines its appearance in the image. The more pixels there are, the higher the resolution and level of detail in the image.
- Colours: Each pixel in a raster graphic can have a specific color assigned to it. By combining different colors at the pixel level, a raster graphic can create various shades, hues, and tones, resulting in a visually appealing image.
- Dots: Dots are another term used to describe the individual units of color in a raster graphic. These dots are arranged in a grid pattern and collectively form the image. The density and arrangement of dots determine the level of detail and clarity in the image.
- Rectangles: While pixels and dots are the fundamental components of a raster graphic, they are arranged in a rectangular grid pattern to form the overall image. Each rectangle represents a pixel or dot, and when combined, they create a visually coherent image.
Conclusion:
In summary, a raster graphic is made up of pixels, which are small units of color arranged in a rectangular grid pattern. These pixels collectively form the image and can create various colors, shades, and tones. Understanding the composition of a raster graphic helps in comprehending how these images are created and displayed on digital devices.

Pressing Shift + A in MS Word
When you press Shift + A in MS Word, the following action takes place:
1. The letter A is typed in small letter:
- Pressing Shift + A does not result in any special action or command in MS Word.
- It simply types the letter "a" in lowercase as if you pressed the "a" key without holding the Shift key.
2. No action is taken on the text:
- Pressing Shift + A does not select or manipulate any text in the document.
- It does not have any effect on the formatting or editing of the existing text.
3. No file-saving or file-closing:
- Pressing Shift + A does not save the file or close the program.
- These actions have their own specific keyboard shortcuts or menu options in MS Word.
In conclusion, pressing Shift + A in MS Word does not have any significant impact on the document or program. It simply types the lowercase letter "a" as if the Shift key was not pressed.

What does a keyboard have?

• Keys: A keyboard is primarily made up of keys, which are used to input characters and commands.


• Buttons: While keys are a type of button, keyboards may also have additional buttons for specific functions such as volume control, media playback, and power.


• Rolling balls: Keyboards typically do not have rolling balls. This answer is incorrect.


• Scroll wheel: Some keyboards, particularly those designed for gaming, may have a scroll wheel or a similar feature for scrolling through content. However, this is not a standard feature of all keyboards.

Therefore, the correct answer is option A: Keys. Keyboards consist of keys that are used to input characters and commands.

The blinking line on the MS Word Screen is called "Cursor".
The cursor is a visual indicator that represents the current position of the text input in a document. It usually appears as a blinking vertical line, but it can also take other forms depending on the program or settings.
Here are some key points to explain the term "Cursor":
- The cursor is an essential element in word processing software like Microsoft Word.
- It indicates where the next character or element will be inserted when you start typing.
- The cursor can be moved using the arrow keys, mouse, or touchpad.
- When you click anywhere in the document, the cursor will move to that position, allowing you to edit or add content at that location.
- The blinking of the cursor helps users easily locate the current input position.
- The cursor can also change its appearance or shape depending on the context, such as when selecting text or performing specific actions.
- In addition to text documents, the cursor is also present in other software applications that involve text input, such as text editors, email clients, and web browsers.
In conclusion, the term "Cursor" refers to the blinking line or indicator that shows the current input position in MS Word and other word processing software. It is a crucial element for editing, formatting, and adding content in documents.

Calculator is an example of a Digital computer
Explanation:
- A calculator is a device that performs mathematical calculations.
- It is an example of a digital computer because it operates using discrete electronic signals or digits.
- Digital computers use binary code (0s and 1s) to represent and process data.
- Calculators typically have a digital display and buttons for inputting numbers and performing various mathematical operations.
- They use microprocessors or integrated circuits to carry out calculations.
- Digital computers are highly accurate and can perform calculations quickly and efficiently.
- They are widely used in various fields such as education, finance, engineering, and science.
- Calculators can range from simple handheld devices to more complex scientific or graphing calculators.
- They are portable and convenient, making them suitable for everyday use and on-the-go calculations.
- In contrast, analog computers use continuous physical quantities to represent and process data, while hybrid computers combine the features of both analog and digital computers. However, calculators are primarily classified as digital computers due to their operation and design.

FORTRAN is a Programming Language
FORTRAN, which stands for Formula Translation, is one of the oldest high-level programming languages. It was developed by IBM in the 1950s and is still widely used today, especially in scientific and engineering applications. Here are some key points about FORTRAN:
1. What is FORTRAN?
- FORTRAN is a general-purpose programming language designed for numeric and scientific computing.
- It was developed to simplify complex mathematical and scientific calculations.
2. Features of FORTRAN:
- FORTRAN provides a variety of built-in functions and libraries for mathematical operations.
- It supports a wide range of data types, including integers, real numbers, complex numbers, and logical values.
- It allows the use of arrays and matrices for efficient handling of large amounts of data.
3. Advantages of FORTRAN:
- FORTRAN is known for its efficiency and performance in numerical computations.
- It has a long history and a large user community, resulting in a wealth of resources and support.
- Many scientific and engineering software packages are written in FORTRAN, making it easier to integrate with existing tools.
4. Applications of FORTRAN:
- FORTRAN is commonly used in fields such as physics, chemistry, engineering, and economics for numerical simulations, data analysis, and modeling.
- It is also used in weather forecasting, computational biology, and other scientific research areas.
In conclusion, FORTRAN is a programming language specifically designed for numerical and scientific computing. Its efficiency and extensive library support have made it a popular choice for a wide range of applications in various scientific and engineering fields.

To convert 1 Terabyte (Tb) into other units of storage, we need to understand the conversion rates between different units of storage.
1 Terabyte (Tb) is equal to:
- 1024 Gigabytes (GB)
- 1024 * 1024 Megabytes (MB)
- 1024 * 1024 * 1024 Kilobytes (KB)
- 1024 * 1024 * 1024 * 1024 Bytes (B)
Therefore, the correct answer is option B: 1024 GB.
Conversion Rates:
- 1 Terabyte (Tb) = 1024 Gigabytes (GB)
- 1 Terabyte (Tb) = 1024 * 1024 Megabytes (MB)
- 1 Terabyte (Tb) = 1024 * 1024 * 1024 Kilobytes (KB)
- 1 Terabyte (Tb) = 1024 * 1024 * 1024 * 1024 Bytes (B)
Summary:
- 1 Terabyte (Tb) is equal to 1024 Gigabytes (GB).
- Other units of storage, such as Megabytes (MB), Kilobytes (KB), and Bytes (B), can be calculated by multiplying the conversion rates accordingly.