Computer Science: CUET Mock Test - 5 - CUET Humanities MCQ

A Python variable is a reserved memory location to store values. In other words, a variable in a python program gives data to the computer for processing. Variables cannot, however, be named the same as keywords (as in case with "try" which is a python variable). Variables cannot contain any special character except "_". They cannot start with numbers and can only contain alphabets, numbers, and underscore (_)

A bus topology is a type of network topology in which all devices are connected to a single cable called a bus, not in ring topology. A star topology is a type of network topology in which all devices are connected to a central hub or switch not in a bus topology. Both are not correct.

Data manipulation languages are divided into two types, procedural programming and declarative programming.

In MAN, different LANs are connected through a local telephone exchange. Some of the widely used protocols for MAN are RS-232, X.25, Frame Relay, Asynchronous Transfer Mode (ATM), ISDN (Integrated Services Digital Network), OC·3 lines (1.55 Mbps), ADSL (Asymmetrical Digital Subscriber Line). These protocols are quite different from those used for LANs.

The rewind() function sets the file position to the beginning of the file for the stream pointed to by stream. It also clears the error and end-of-file indicators for stream.

Client-server architecture is an architecture in which devices are connected to a central server, which provides services to clients. Clients request services from the server, which then provides a response.
Peer-to-peer architecture is an architecture in which devices communicate directly with each other without a central server. Each device can act as both a client and a server.
Service-oriented architecture (SOA) is an architecture in which services are exposed as independent components that can be accessed over a network. Services can be combined to create more complex applications.
Cloud architecture is an architecture in which resources are provisioned dynamically and accessed over a network. It allows users to access resources such as storage and computing power on-demand.

In this program, getc() function within the while loop will read the characters from TCY.c one by one and display on the screen through the variable Tch.

The tell() method can be used to get the position of File Handle. It returns the current position of the file object. This method takes no parameters and returns an integer value.

The append() method adds an item to the end of the list.

The following program, print((1,2) + (3,4)) gives:
For the given program, we have two tuples, and we are printing the concatenation of these tuples.
i.e print((1, 2) + (3, 4))
A collection of Python objects separated by comma is called a Tuple.
In this, we are using the concatenation operator +, to join the two tuples.
So, (1,2,3,4) is the answer.

Following is the various Applications of Stack in Data Structure:

• Evaluation of Arithmetic Expressions
• Backtracking
• Delimiter Checking
• Reverse a Data
• Processing Function Calls

Non-Procedural DML or High level DML requires a user to specify what data are needed without specifying how to get those data.

Insert is a widely-used command in the Structured Query Language (SQL) data manipulation language (DML) used by SQL Server and Oracle relational databases. The insert command is used for inserting one or more rows into a database table with specified table column values.

White hat hackers are security professionals who follow ethical and legal behavior. Their objective is to help improve security.

Communication bandwidth that has the highest capacity and is used by microwave, cable and fibre optic lines is known as broadband.

Open() function correct syntax with the parameter details is as shown below:
file object = open(file_name [, access_mode][, buffering])
Here are the parameters details:
file_name: The file_name argument is a string value that contains the name of the file that you want to access.
access_mode: The access_mode determines the mode in which the file has to be opened.
buffering: If the buffering value is set to 0, no buffering will take place. If the buffering value is 1, line buffering will be performed while accessing a file.

These are the basic operations of Stack Data Structure:

• Push operation adds a new element to the top of the stack.
• Pop operation removes the top element from the stack and returns it.
• Peek operation returns the top element of the stack without removing it.
• Size operation returns the number of elements currently in the stack.

In pickle module, the load() function is used to read data from a binary file or file object.

A personal area network (PAN) is a computer network used for data transmission among devices such as computers, telephones, tablets and personal digital assistants. PAN can be wireless as well as wired. The best example of wireless PAN is bluetooth, which is generally used to transfer songs from one mobile phone to another.

Python provides two built-in functions to read a line of text from standard input, which by default come from the keyboard. These functions are: raw_input and input.

Just remember: PEMDAS, that is, Parenthesis, Exponentiation, Multiplication, Division, Addition, Subtraction. Note that the precedence order of Division and Multiplication is the same.

Types of SQL Commands:

• DDL (Data Definition Language)
• DML (Data Manipulation Language)
• DQL (Data Query Language)
• DCL (Data Control Language)
• Data administration commands
• Transaction control commands

The loop does not terminate as new elements are being added to the list in each iteration.

A queue is a data structure that follows the First-In-First-Out (FIFO) principle. It means the first item added to the queue is the first item to be removed from the queue.

To access only a particular part of a file, functions such as fseek(), rewind(), and ftell() can be used.

The append mode defines the way in which new data is added to the already existing data. The property can be used with both, import and export operations. During import, new table is created in the target database.

The World Wide Web—commonly referred to as www, W3, or the web—is an interconnected system of public web pages accessible through the internet.

Cryptography is the study and practice of techniques for secure communication in the presence of third parties called adversaries. It deals with developing and analyzing protocols which prevents malicious third parties from retrieving information being shared between two entities thereby following the various aspects of information security.

The reverse() method reverses the order of the elements in an array. The reverse() method overwrites the original array.

A right parenthesis makes pop operation to delete the elements in stack till we get left parenthesis as top most element. 3 elements are there in stack before right parentheses comes. Therefore, maximum number of elements in stack at run time is 3.