Important Computer MCQs From Basic To Advance
Which of the following is a programming language?
a) HTML
b) JPEG
c) PDF
d) MP3
Answer: a) HTML
What does CPU stand for?
a) Central Processing Unit
b) Computer Processing Unit
c) Control Processing Unit
d) Central Power Unit
Answer: a) Central Processing Unit
What is the binary representation of the decimal number 10?
a) 1000
b) 1010
c) 1100
d) 1110
Answer: b) 1010
Which programming language is often used for developing mobile applications?
a) Java
b) C++
c) Python
d) PHP
Answer: a) Java
What does HTML stand for?
a) Hyper Text Markup Language
b) High Technical Markup Language
c) Hyperlinks and Text Markup Language
d) Home Tool Markup Language
Answer: a) Hyper Text Markup Language
Which of the following is a database management system?
a) Microsoft Word
b) Adobe Photoshop
c) MySQL
d) Microsoft Excel
Answer: c) MySQL
What is the function of an operating system?
a) To manage hardware resources and provide common services
b) To develop software applications
c) To design computer networks
d) To create graphical user interfaces
Answer: a) To manage hardware resources and provide common services
Which company developed the Python programming language?
a) Microsoft
b) Google
c) Apple
d) None of the above
Answer: d) None of the above (Python was developed by Guido van Rossum)
What is the purpose of a firewall in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) All of the above
Answer: d) All of the above
Which of the following is an example of a high-level programming language?
a) Assembly language
b) C
c) Machine language
d) Binary code
Answer: b) C
What does RAM stand for?
a) Random Access Memory
b) Read-Only Memory
c) Run-As-Managed
d) Real-time Application Monitoring
Answer: a) Random Access Memory
Which programming language is used for creating web pages?
a) Java
b) HTML
c) C#
d) Objective-C
Answer: b) HTML
What is the purpose of an IP address?
a) To identify a website
b) To locate a file on a computer
c) To uniquely identify a device on a network
d) To encrypt data for secure transmission
Answer: c) To uniquely identify a device on a network
What is the output of the following code snippet?
x = 5
y = 2
z = x % y
print(z)
a) 3
b) 2
c) 2.5
d) 0
Answer: d) 0
Which of the following data structures uses the Last-In-First-Out (LIFO) principle?
a) Queue
b) Stack
c) Linked List
d) Tree
Answer: b) Stack
Which programming language is known for its use in artificial intelligence and machine learning?
a) Java
b) Python
c) C++
d) Ruby
Answer: b) Python
What is the purpose of an index in a database?
a) To improve data security
b) To organize and speed up data retrieval
c) To compress data for storage efficiency
d) To create backups of the data
Answer: b) To organize and speed up data retrieval
Which of the following is a file compression format?
a) ZIP
b) TXT
c) PNG
d) MP4
Answer: a) ZIP
What is the primary function of an assembler?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: b) To translate high-level language code into machine code
What does the HTTP acronym stand for?
a) Hypertext Transfer Protocol
b) Hypertext Terminal Protocol
c) Hyperlink Transfer Protocol
d) Hyper Transfer Terminal Protocol
Answer: a) Hypertext Transfer Protocol
Which of the following is an example of a web browser?
a) Microsoft Excel
b) Adobe Photoshop
c) Google Chrome
d) Visual Studio Code
Answer: c) Google Chrome
What is the purpose of the “if” statement in programming?
a) To declare variables
b) To define loops
c) To perform conditional execution
d) To create functions
Answer: c) To perform conditional execution
Which of the following is a valid domain name?
a) 123.456.789
b) www.example.com
c) localhost
d) user@domain.com
Answer: b) www.example.com
What does the SQL acronym stand for?
a) Standard Query Language
b) Structured Query Language
c) Simple Query Language
d) Sequential Query Language
Answer: b) Structured Query Language
Which of the following is an example of a programming paradigm?
a) Object-Oriented Programming
b) Binary Programming
c) Graphical Programming
d) All of the above
Answer: a) Object-Oriented Programming
What is the purpose of a compiler?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: b) To translate high-level language code into machine code
Which of the following is an example of spreadsheet software?
a) Microsoft Word
b) Adobe Illustrator
c) Microsoft Excel
d) Photoshop
Answer: c) Microsoft Excel
What is the default file extension for a Microsoft Word document?
a) .txt
b) .doc
c) .pdf
d) .xls
Answer: b) .doc
Which of the following is NOT a programming language?
a) Java
b) Photoshop
c) C++
d) Python
Answer: b) Photoshop
What does the acronym “URL” stand for?
a) Universal Resource Locator
b) Universal Record Locator
c) Unique Resource Locator
d) Unique Record Locator
Answer: a) Universal Resource Locator
Which programming language is often used for game development?
a) Java
b) HTML
c) C++
d) CSS
Answer: c) C++
What is the output of the following code snippet?
x = 2 + 3 * 4
print(x)
a) 14
b) 20
c) 15
d) 10
Answer: d) 10
What does the acronym “LAN” stand for?
a) Local Area Network
b) Large Area Network
c) Long Area Network
d) Low Area Network
Answer: a) Local Area Network
Which of the following is an example of a relational database management system?
a) MySQL
b) MongoDB
c) SQLite
d) All of the above
Answer: a) MySQL
What is the purpose of a loop in programming?
a) To execute a block of code repeatedly
b) To define variables
c) To perform arithmetic calculations
d) To manage computer memory
Answer: a) To execute a block of code repeatedly
Which of the following is a programming paradigm that focuses on the sequential execution of instructions?
a) Procedural programming
b) Object-Oriented Programming
c) Functional programming
d) Event-driven programming
Answer: a) Procedural programming
What is the purpose of a primary key in a database table?
a) To ensure data integrity
b) To improve data security
c) To organize data in a table
d) To establish relationships between tables
Answer: a) To ensure data integrity
Which of the following is NOT a valid programming variable type?
a) String
b) Integer
c) Boolean
d) Floatation
Answer: d) Floatation
What is the purpose of the “else” statement in programming?
a) To declare variables
b) To define loops
c) To perform conditional execution when the “if” condition is false
d) To create functions
Answer: c) To perform conditional execution when the “if” condition is false
Which of the following is an example of an object-oriented programming language?
a) C
b) Assembly language
c) Python
d) Fortran
Answer: c) Python
What is the purpose of a router in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To forward data packets between networks
Answer: d) To forward data packets between networks
What does the acronym “FTP” stand for?
a) File Transfer Protocol
b) File Tracking Protocol
c) File Text Protocol
d) Fast Transfer Protocol
Answer: a) File Transfer Protocol
Which programming language is often used for scientific computing and data analysis?
a) Java
b) Python
c) C#
d) Ruby
Answer: b) Python
What is the purpose of an operating system kernel?
a) To manage hardware resources
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: a) To manage hardware resources
Which of the following is an example of a file system?
a) NTFS
b) HTTP
c) SMTP
d) FTP
Answer: a) NTFS
What does the acronym “HTML” stand for?
a) Hypertext Machine Language
b) Hypertext Markup Language
c) Hyperlink and Text Markup Language
d) Home Tool Markup Language
Answer: b) Hypertext Markup Language
Which programming language is often used for web development and server-side scripting?
a) Java
b) HTML
c) C++
d) PHP
Answer: d) PHP
What is the purpose of a compiler?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: b) To translate high-level language code into machine code
Which of the following is an example of a command-line interface (CLI) operating system?
a) Windows
b) macOS
c) Linux
d) All of the above
Answer: c) Linux
What is the purpose of a web server?
a) To protect against malware
b) To store and manage databases
c) To host websites and serve web pages to clients
d) To create graphical user interfaces
Answer: c) To host websites and serve web pages to clients
What does the acronym “CSS” stand for?
a) Cascading Style Sheets
b) Computer Style Sheets
c) Creative Style Sheets
d) Colorful Style Sheets
Answer: a) Cascading Style Sheets
Which of the following is a programming language often used for game development?
a) Java
b) HTML
c) C++
d) CSS
Answer: c) C++
What is the output of the following code snippet?
x = “Hello”
y = “World”
z = x + ” ” + y
print(z)
a) Hello
b) World
c) Hello World
d) Helloworld
Answer: c) Hello World
What is the purpose of a network protocol?
a) To define a set of rules for communication between devices
b) To store and organize data in a structured format
c) To execute program instructions
d) To manage computer memory
Answer: a) To define a set of rules for communication between devices
Which of the following is NOT a type of computer memory?
a) RAM
b) ROM
c) CPU
d) Cache
Answer: c) CPU
What is the purpose of a switch in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To connect multiple devices on a local network
Answer: d) To connect multiple devices on a local network
Which of the following is an example of an integrated development environment (IDE)?
a) Microsoft Word
b) Adobe Photoshop
c) Visual Studio Code
d) Notepad
Answer: c) Visual Studio Code
What is the purpose of a database index?
a) To improve data security
b) To organize and speed up data retrieval
c) To compress data for storage efficiency
d) To create backups of the data
Answer: b) To organize and speed up data retrieval
Which programming language is often used for data analysis and statistical computing?
a) Java
b) Python
c) C#
d) Ruby
Answer: b) Python
What does the acronym “GUI” stand for?
a) Graphical User Interface
b) General User Interface
c) Graphical Utility Interface
d) General Utility Interface
Answer: a) Graphical User Interface
Which of the following is an example of a network topology?
a) TCP/IP
b) Star
c) HTML
d) PHP
Answer: b) Star
What is the purpose of the “while” loop in programming?
a) To execute a block of code repeatedly until a condition is false
b) To define variables
c) To perform arithmetic calculations
d) To manage computer memory
Answer: a) To execute a block of code repeatedly until a condition is false
Which of the following is NOT a valid data type in Python?
a) String
b) Integer
c) Float
d) Boolean
Answer: d) Boolean
What is the purpose of an API in software development?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To define a set of rules and protocols for building software applications
d) To manage computer memory
Answer: c) To define a set of rules and protocols for building software applications
Which of the following is an example of a non-volatile memory?
a) RAM
b) Cache
c) Hard Disk Drive (HDD)
d) CPU
Answer: c) Hard Disk Drive (HDD)
What is the purpose of a function in programming?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To perform a specific task or calculation
d) To manage computer memory
Answer: c) To perform a specific task or calculation
Which of the following is a markup language often used for structuring and presenting content on the web?
a) Java
b) HTML
c) C++
d) PHP
Answer: b) HTML
What is the purpose of a VPN in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To establish a secure connection over a public network
Answer: d) To establish a secure connection over a public network
What does the acronym “SMTP” stand for?
a) Simple Mail Transfer Protocol
b) Secure Mail Transfer Protocol
c) Standard Mail Transfer Protocol
d) Static Mail Transfer Protocol
Answer: a) Simple Mail Transfer Protocol
Which programming language is often used for front-end web development?
a) Java
b) HTML
c) C++
d) CSS
Answer: d) CSS
What is the output of the following code snippet?
x = 3 ** 2
print(x)
a) 6
b) 9
c) 11
d) 18
Answer: b) 9
Which of the following is an example of a cloud computing service?
a) Microsoft Office
b) Adobe Photoshop
c) Amazon Web Services (AWS)
d) Notepad
Answer: c) Amazon Web Services (AWS)
What is the purpose of a firewall in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To forward data packets between networks
Answer: c) To control access to a network
What does the acronym “URL” stand for?
a) Universal Resource Locator
b) Unique Record Locator
c) Uniform Record Locator
d) Universal Routing Locator
Answer: a) Universal Resource Locator
Which of the following is a database management system often used for mobile applications?
a) MySQL
b) SQLite
c) MongoDB
d) PostgreSQL
Answer: b) SQLite
What is the purpose of the “elif” statement in programming?
a) To declare variables
b) To define loops
c) To perform conditional execution when multiple conditions are true
d) To create functions
Answer: c) To perform conditional execution when multiple conditions are true
Which of the following is an example of a scripting language?
a) Java
b) HTML
c) Python
d) C++
Answer: c) Python
What is the purpose of an operating system?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To manage computer hardware and software resources
d) To debug software applications
Answer: c) To manage computer hardware and software resources
Which of the following is NOT a valid data structure?
a) Stack
b) Queue
c) Array
d) Algorithm
Answer: d) Algorithm
What is the purpose of a router in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To forward data packets between networks
Answer: d) To forward data packets between networks
What does the acronym “FTP” stand for?
a) File Transfer Protocol
b) File Tracking Protocol
c) File Text Protocol
d) Fast Transfer Protocol
Answer: a) File Transfer Protocol
Which programming language is often used for scientific computing and numerical analysis?
a) Java
b) Python
c) C#
d) Ruby
Answer: b) Python
What is the purpose of an IDE in software development?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To provide a comprehensive development environment with tools for coding, debugging, and testing
d) To manage computer memory
Answer: c) To provide a comprehensive development environment with tools for coding, debugging, and testing
Which of the following is an example of a database management system?
a) MySQL
b) MongoDB
c) SQLite
d) All of the above
Answer: d) All of the above
What is the purpose of a loop in programming?
a) To execute a block of code repeatedly
b) To define variables
c) To perform arithmetic calculations
d) To manage computer memory
Answer: a) To execute a block of code repeatedly
Which of the following is a programming paradigm that focuses on objects and their interactions?
a) Procedural programming
b) Object-Oriented Programming
c) Functional programming
d) Event-driven programming
Answer: b) Object-Oriented Programming
What is the purpose of a primary key in a database table?
a) To ensure data integrity
b) To improve data security
c) To organize data in a table
d) To establish relationships between tables
Answer: a) To ensure data integrity
Which of the following is NOT a valid programming variable type?
a) String
b) Integer
c) Boolean
d) Floatation
Answer: d) Floatation
What is the purpose of the “else” statement in programming?
a) To declare variables
b) To define loops
c) To perform conditional execution when the “if” condition is false
d) To create functions
Answer: c) To perform conditional execution when the “if” condition is false
Which of the following is an example of an object-oriented programming language?
a) C
b) Assembly language
c) Python
d) Fortran
Answer: c) Python
What is the purpose of a router in computer networks?
a) To protect against malware
b) To monitor network traffic
c) To control access to a network
d) To forward data packets between networks
Answer: d) To forward data packets between networks
What does the acronym “FTP” stand for?
a) File Transfer Protocol
b) File Tracking Protocol
c) File Text Protocol
d) Fast Transfer Protocol
Answer: a) File Transfer Protocol
Which programming language is often used for scientific computing and data analysis?
a) Java
b) Python
c) C#
d) Ruby
Answer: b) Python
What is the purpose of an operating system kernel?
a) To manage hardware resources
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: a) To manage hardware resources
Which of the following is an example of a file system?
a) NTFS
b) HTTP
c) SMTP
d) FTP
Answer: a) NTFS
What does the acronym “HTML” stand for?
a) Hypertext Machine Language
b) Hypertext Markup Language
c) Hyperlink and Text Markup Language
d) Home Tool Markup Language
Answer: b) Hypertext Markup Language
Which programming language is often used for web development and server-side scripting?
a) Java
b) HTML
c) C++
d) PHP
Answer: d) PHP
What is the purpose of a compiler?
a) To execute program instructions
b) To translate high-level language code into machine code
c) To debug software applications
d) To manage computer memory
Answer: b) To translate high-level language code into machine code
Which of the following is an example of a command-line interface (CLI) operating system?
a) Windows
b) macOS
c) Linux
d) All of the above
Answer: c) Linux
What is the purpose of a web server?
a) To protect against malware
b) To store and manage databases
c) To host websites and serve web pages to clients
d) To create graphical user interfaces
Answer: c) To host websites and serve web pages to clients
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