What is a primary key in a database table?
A key used to unlock the database
A key used for encryption
A unique identifier for each record in the table
A key used for sorting records
Correct Answer :
C. A unique identifier for each record in the table
Related Questions
Which data structure uses a First-In-First-Out (FIFO) order?
Stack
Queue
Linked List
Binary Tree
Which programming language is often used for data analysis and machine learning?
Java
Ruby
Python
C#
What is an algorithm in computer science?
A type of data structure
A step-by-step procedure for solving a problem
A type of programming language
A hardware component
In the context of cybersecurity, what does the term phishing refer to?
Catching harmful computer viruses
Fishing for personal information through deceptive emails or websites
Encrypting data for security
Scanning for network vulnerabilities
What is the purpose of a relational database?
To store and manage data in a tabular format with relationships between tables
To display web pages
To protect against viruses
To create graphics
What does GUI stand for in the context of computer software?
Graphic User Interface
General User Instruction
Graphical Unit Integration
Global User Interface
What is the purpose of a while loop in programming?
To define a function
To create graphics
To execute a block of code a specific number of times
To repeat a block of code while a condition is true
What is a primary key in a database table?
A key used to unlock the database
A key used for encryption
A unique identifier for each record in the table
A key used for sorting records
What is the binary equivalent of the decimal number 25?
11001
11100
10011
11010
What does IP stand for in the context of computer networking?
Internet Protocol
Internal Processor
Information Provider
Internet Program
Which of the following is not a valid data structure in Python?
List
Tuple
Stack
String
What does the term ASCII stand for in the context of character encoding?
American Standard Code for Information Interchange
Advanced Standard Character Set Instruction
Automated System for Computer Information
Algorithmic Symbol Coding and Interpretation
In object-oriented programming, what is a class?
A type of data structure
A step-by-step procedure
A blueprint for creating objects
A loop
What is the purpose of the continue statement in programming?
To exit a loop prematurely
To define a function
To print output to the console
To create a loop
What is the purpose of the do-while loop in programming?
To execute a block of code a specific number of times
To create graphics
To make decisions and execute code conditionally
To repeat a block of code while a condition is true, with the condition checked after the loop body
Which of the following is a valid way to define a variable in Python?
variableName = 42
variableName := 42
42 = variableName
variableName -> 42
What is the purpose of a function in programming?
To store data
To perform a specific task or calculation
To display information on the screen
To create graphics
What is a variable in programming?
A value that cannot be changed
A container for storing data
A type of loop
A function
What is a conditional operator in programming?
An operator that performs mathematical calculations
An operator that combines two values
An operator that evaluates a condition and returns one of two values based on the condition
An operator that compares two values for equality
What is a compiler in programming?
A program that translates high-level code into machine code
A program that optimizes code for performance
A program that creates graphics
A type of loop
In object-oriented programming, what is an instance of a class?
A variable
A function
An object created based on the class
A class variable
What is the purpose of the return statement in a function in most programming languages?
To exit the program
To print a message to the console
To stop a loop
To return a value from a function
What is a function signature in programming?
A unique identifier for a function
The name of a function
The body of a function
A comment within a function
What is the purpose of the break statement in programming?
To create a loop
To exit a loop prematurely
To define a function
To print output to the console
What is a data structure in programming?
A type of loop
A category of values with a common set of operations
A programming language
A set of rules for writing code
Which of the following is not a valid type of computer network?
Local Area Network (LAN)
Wide Area Network (WAN)
Personal Area Network (PAN)
Personal Computer Network (PCN)
What is a network firewall used for?
To protect against physical intrusions
To block unwanted network traffic and protect a network from unauthorized access
To boost network speed
To filter spam emails
What is the purpose of an if-else statement in programming?
To create a loop
To define a function
To make decisions and execute code conditionally
To print output to the console
What is the purpose of the elif statement in Python?
It is used to define a new variable.
It is used to handle exceptions.
It is used to execute code if the if condition is false.
It is used to test multiple conditions sequentially.
What is a DNS server responsible for in the context of the internet?
Storing email messages
Translating domain names into IP addresses
Managing network hardware
Providing web hosting services