COMPUTER SCIENCE SOLVED MCQS

Which of the following is the main function of the CPU?

• A. Storing data
• B. Executing instructions
• C. Input and output
• D. Networking
• Answer: B

Which of the following is the primary storage device of a computer?

• A. Hard disk
• B. RAM
• C. ROM
• D. CD-ROM
• Answer: B

Which of the following is an example of an output device?

• A. Monitor
• B. Keyboard
• C. Mouse
• D. Printer
• Answer: A

Which of the following is an example of an input device?

• A. Monitor
• B. Keyboard
• C. Mouse
• D. Printer
• Answer: B

Which of the following is an operating system?

• A. Microsoft Windows
• B. Linux
• C. macOS
• D. All of the above
• Answer: D

Which of the following is a word processing software?

• A. Microsoft Word
• B. Google Docs
• C. LibreOffice Writer
• D. All of the above
• Answer: D

Which of the following is a spreadsheet software?

• A. Microsoft Excel
• B. Google Sheets
• C. LibreOffice Calc
• D. All of the above
• Answer: D

Which of the following is a presentation software?

• A. Microsoft PowerPoint
• B. Google Slides
• C. LibreOffice Impress
• D. All of the above
• Answer: D

Which of the following is a database software?

• A. Microsoft Access
• B. MySQL
• C. Oracle
• D. All of the above
• Answer: D

Which of the following is a web browser?

What is the full form of RAM?

• A. Random Access Memory
• B. Read Only Memory
• C. Real Time Memory
• D. Reduced Access Memory
• Answer: A

What is the full form of ROM?

• A. Read Only Memory
• B. Random Access Memory
• C. Real Time Memory
• D. Reduced Access Memory
• Answer: A

What is the full form of CPU?

• A. Central Processing Unit
• B. Central Processing Utility
• C. Central Processing Unit
• D. Central Processing Unit
• Answer: A

What is the full form of GUI?

• A. Graphical User Interface
• B. Graphical Utility Interface
• C. Graphical User Inference
• D. Graphical User Insertion
• Answer: A

What is the full form of OS?

• A. Operating System
• B. Operating Scheme
• C. Operating Structure
• D. Operating Solution
• Answer: A

What is the full form of LAN?

• A. Local Area Network
• B. Local Access Network
• C. Local Agreement Network
• D. Local Adaptation Network
• Answer: A

What is the full form of WAN?

• A. Wide Area Network
• B. Wide Access Network
• C. Wide Agreement Network
• D. Wide Adaptation Network
• Answer: A

What is the full form of WWW?

• A. World Wide Web
• B. World Wide Worksheet
• C. World Wide Wire
• D. World Wide Word
• Answer: A

What is the full form of HTTP?

• A. HyperText Transfer Protocol
• B. HyperText Transfer Procedure
• C. HyperText Transfer Process
• D. HyperText Transfer Policy
• Answer: A

What is the full form of HTTPS?

What is the difference between RAM and ROM?

• A. RAM is volatile memory, while ROM is non-volatile memory.
• B. RAM is permanent memory, while ROM is temporary memory.
• C. RAM is used to store data, while ROM is used to store instructions.
• D. RAM is used to store programs, while ROM is used to store data.
• Answer: A

What is the function of the BIOS?

• A. It boots the computer.
• B. It manages the hardware.
• C. It provides a user interface.
• D. All of the above.
• Answer: D

What is the difference between a virus and a worm?

• A. A virus needs a host program to run, while a worm can run independently.
• B. A virus can only spread through removable media, while a worm can spread over a network.
• C. A virus is a self-replicating program, while a worm is not.
• D. All of the above.
• Answer: C

What is the difference between a Trojan horse and a backdoor?

• A. A Trojan horse is a malicious program that masquerades as a legitimate program, while a backdoor is a hidden way into a computer system.
• B. A Trojan horse can only steal data, while a backdoor can also be used to control the computer system.
• C. A Trojan horse is installed by the user, while a backdoor is installed by the attacker.
• D. All of the above.
• Answer: A

What is the difference between a denial-of-service attack and a distributed denial-of-service attack?

• A. A denial-of-service attack is an attack that makes a website or service unavailable, while a distributed denial-of-service attack is an attack that uses multiple computers to make a website or service unavailable.
• B. A denial-of-service attack is an attack that is launched from a single computer, while a distributed denial-of-service attack is an attack that is launched from multiple computers.
• C. A denial-of-service attack is an attack that is launched by a hacker, while a distributed denial-of-service attack is an attack that is launched by a botnet.
• D. All of the above.
• Answer: A

What is the difference between a firewall and an antivirus software?

• A. A firewall protects a computer from unauthorized access, while an antivirus software protects a computer from malware.
• B. A firewall is a hardware device, while an antivirus software is a software program.
• C. A firewall is used to filter network traffic, while an antivirus software is used to scan files for malware.
• D. All of the above.
• Answer: A

What is the difference between a web browser and an email client?

• A. A web browser is used to access websites, while an email client is used to send and receive emails.
• B. A web browser is a software program, while an email client is a hardware device.
• C. A web browser is used to view web pages, while an email client is used to compose and read emails.
• D. All of the above.
• Answer: A

What is the difference between a file and a folder?

• A. A file is a unit of data, while a folder is a container for files.
• B. A file is a physical object, while a folder is a logical object.
• C. A file can only be opened by one program, while a folder can be opened by multiple programs.
• D. All of the above.
• Answer: A

What is the difference between a hard disk drive and a solid-state drive?

Which of the following is a programming language?

• A. Java
• B. Python
• C. C++
• D. All of the above
• Answer: D

Which of the following is a scripting language?

• A. JavaScript
• B. PHP
• C. Ruby
• D. All of the above
• Answer: D

Which of the following is a markup language?

• A. HTML
• B. CSS
• C. XML
• D. All of the above
• Answer: D

Which of the following is a database management system?

• A. MySQL
• B. Oracle
• C. Microsoft SQL Server
• D. All of the above
• Answer: D

Which of the following is a cloud computing service?

• A. Amazon Web Services
• B. Microsoft Azure
• C. Google Cloud Platform
• D. All of the above
• Answer: D

Which of the following is a social networking site?

• A. Facebook
• B. Twitter
• C. LinkedIn
• D. All of the above
• Answer: D

Which of the following is a search engine?

• A. Google
• B. Bing
• C. Yahoo!
• D. All of the above
• Answer: D

Which of the following is a video streaming service?

• A. Netflix
• B. Hulu
• C. Amazon Prime Video
• D. All of the above
• Answer: D

Which of the following is a music streaming service?

• A. Spotify
• B. Apple Music
• C. Amazon Music
• D. All of the above
• Answer: D

Which of the following is a cloud gaming service?

• A. Google Stadia
• B. NVIDIA GeForce Now
• C. Amazon Luna
• D. All of the above
• Answer: D

Which of the following is a virtual reality headset?

What is the most common type of network?

• A. LAN
• B. WAN
• C. MAN
• D. PAN
• Answer: A

What is the difference between a LAN and a WAN?

• A. A LAN is a local area network, while a WAN is a wide area network.
• B. A LAN is a private network, while a WAN is a public network.
• C. A LAN is a network that covers a small area, while a WAN is a network that covers a large area.
• D. All of the above.
• Answer: D

What is the difference between a MAN and a WAN?

• A. A MAN is a metropolitan area network, while a WAN is a wide area network.
• B. A MAN is a network that covers a city, while a WAN is a network that covers a country or continent.
• C. A MAN is a private network, while a WAN is a public network.
• D. All of the above.
• Answer: B

What is the difference between a client and a server?

• A. A client is a computer that requests resources from a server, while a server is a computer that provides resources to clients.
• B. A client is a software program that requests resources from a server, while a server is a hardware device that provides resources to clients.
• C. A client is a physical object, while a server is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a web server and an application server?

• A. A web server is a server that delivers web pages, while an application server is a server that runs applications.
• B. A web server is a hardware device, while an application server is a software program.
• C. A web server is a physical object, while an application server is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a proxy server and a firewall?

• A. A proxy server is a server that acts as an intermediary between a client and a server, while a firewall is a device that protects a network from unauthorized access.
• B. A proxy server is a hardware device, while a firewall is a software program.
• C. A proxy server is a physical object, while a firewall is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a router and a switch?

• A. A router is a device that connects networks, while a switch is a device that connects devices on the same network.
• B. A router is a hardware device, while a switch is a software program.
• C. A router is a physical object, while a switch is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a hub and a switch?

• A. A hub is a device that connects devices on the same network, while a switch is a device that connects devices on the same network and forwards traffic to the correct device.
• B. A hub is a hardware device, while a switch is a software program.
• C. A hub is a physical object, while a switch is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a modem and a router?

• A. A modem is a device that converts analog signals to digital signals and vice versa, while a router is a device that connects networks.
• B. A modem is a hardware device, while a router is a software program.
• C. A modem is a physical object, while a router is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a Wi-Fi and a Bluetooth?

What is the difference between a web browser and a search engine?

• A. A web browser is a software program that allows users to view web pages, while a search engine is a website that allows users to search for information on the web.
• B. A web browser is a hardware device, while a search engine is a software program.
• C. A web browser is a physical object, while a search engine is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a website and a web page?

• A. A website is a collection of web pages, while a web page is a single document that is displayed on the web.
• B. A website is a software program, while a web page is a hardware device.
• C. A website is a physical object, while a web page is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a URL and a web address?

• A. A URL is a Uniform Resource Locator, while a web address is a way to identify a website on the internet.
• B. A URL is a software program, while a web address is a hardware device.
• C. A URL is a physical object, while a web address is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a domain name and a top-level domain?

• A. A domain name is the address of a website on the internet, while a top-level domain is the last part of a domain name.
• B. A domain name is a software program, while a top-level domain is a hardware device.
• C. A domain name is a physical object, while a top-level domain is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a static website and a dynamic website?

• A. A static website is a website that does not change, while a dynamic website is a website that changes depending on the user's input.
• B. A static website is a software program, while a dynamic website is a hardware device.
• C. A static website is a physical object, while a dynamic website is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a blog and a wiki?

• A. A blog is a website that is updated regularly with new content, while a wiki is a website that allows users to collaborate on content.
• B. A blog is a software program, while a wiki is a hardware device.
• C. A blog is a physical object, while a wiki is a logical object.
• D. All of the above.
• Answer: A

What is the difference between an email and a chat?

• A. An email is a message that is sent over the internet, while a chat is a real-time conversation that is held over the internet.
• B. An email is a software program, while a chat is a hardware device.
• C. An email is a physical object, while a chat is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a social network and a social media platform?

What is the difference between a cloud computing service and a platform as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a platform as a service is a service that provides access to a platform over the internet.
• B. A cloud computing service is a software program, while a platform as a service is a hardware device.
• C. A cloud computing service is a physical object, while a platform as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and an infrastructure as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while an infrastructure as a service is a service that provides access to infrastructure over the internet.
• B. A cloud computing service is a software program, while an infrastructure as a service is a hardware device.
• C. A cloud computing service is a physical object, while an infrastructure as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a disaster recovery as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a disaster recovery as a service is a service that provides access to disaster recovery solutions over the internet.
• B. A cloud computing service is a software program, while a disaster recovery as a service is a hardware device.
• C. A cloud computing service is a physical object, while a disaster recovery as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a security as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a security as a service is a service that provides access to security solutions over the internet.
• B. A cloud computing service is a software program, while a security as a service is a hardware device.
• C. A cloud computing service is a physical object, while a security as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a machine learning as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a machine learning as a service is a service that provides access to machine learning solutions over the internet.
• B. A cloud computing service is a software program, while a machine learning as a service is a hardware device.
• C. A cloud computing service is a physical object, while a machine learning as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a blockchain as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a blockchain as a service is a service that provides access to blockchain solutions over the internet.
• B. A cloud computing service is a software program, while a blockchain as a service is a hardware device.
• C. A cloud computing service is a physical object, while a blockchain as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a big data as a service?

What is the difference between a cloud computing service and a virtual machine as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a virtual machine as a service is a service that provides access to virtual machines over the internet.
• B. A cloud computing service is a software program, while a virtual machine as a service is a hardware device.
• C. A cloud computing service is a physical object, while a virtual machine as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a container as a service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a container as a service is a service that provides access to containers over the internet.
• B. A cloud computing service is a software program, while a container as a service is a hardware device.
• C. A cloud computing service is a physical object, while a container as a service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a serverless computing?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a serverless computing is a service that provides access to computing resources without the need to manage servers.
• B. A cloud computing service is a software program, while a serverless computing is a hardware device.
• C. A cloud computing service is a physical object, while a serverless computing is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a content delivery network?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a content delivery network is a service that delivers content over the internet.
• B. A cloud computing service is a software program, while a content delivery network is a hardware device.
• C. A cloud computing service is a physical object, while a content delivery network is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a web application firewall?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a web application firewall is a service that protects web applications from attacks.
• B. A cloud computing service is a software program, while a web application firewall is a hardware device.
• C. A cloud computing service is a physical object, while a web application firewall is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a managed service?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a managed service is a service that provides management of computing resources over the internet.
• B. A cloud computing service is a software program, while a managed service is a hardware device.
• C. A cloud computing service is a physical object, while a managed service is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a hybrid cloud?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a hybrid cloud is a deployment model that combines public cloud and private cloud resources.
• B. A cloud computing service is a software program, while a hybrid cloud is a hardware device.
• C. A cloud computing service is a physical object, while a hybrid cloud is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a multi-cloud?

What is the difference between a cloud computing service and a private cloud?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a private cloud is a deployment model that provides computing resources to a single organization.
• B. A cloud computing service is a software program, while a private cloud is a hardware device.
• C. A cloud computing service is a physical object, while a private cloud is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a community cloud?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a community cloud is a deployment model that provides computing resources to a specific community of organizations.
• B. A cloud computing service is a software program, while a community cloud is a hardware device.
• C. A cloud computing service is a physical object, while a community cloud is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a mainframe?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a mainframe is a large computer that can handle a lot of data.
• B. A cloud computing service is a software program, while a mainframe is a hardware device.
• C. A cloud computing service is a physical object, while a mainframe is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a supercomputer?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while a supercomputer is a very powerful computer that can handle complex calculations.
• B. A cloud computing service is a software program, while a supercomputer is a hardware device.
• C. A cloud computing service is a physical object, while a supercomputer is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a grid computing?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while grid computing is a distributed computing model that uses multiple computers to solve a problem.
• B. A cloud computing service is a software program, while grid computing is a hardware device.
• C. A cloud computing service is a physical object, while grid computing is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a peer-to-peer computing?

• A. A cloud computing service is a service that provides access to computing resources over the internet, while peer-to-peer computing is a distributed computing model that uses computers to share resources with each other.
• B. A cloud computing service is a software program, while peer-to-peer computing is a hardware device.
• C. A cloud computing service is a physical object, while peer-to-peer computing is a logical object.
• D. All of the above.
• Answer: A

What is the difference between a cloud computing service and a distributed computing?

What is a database?

• A. A database is a collection of data that is organized so that it can be easily accessed, managed, and updated.
• B. A database is a software program that manages data.
• C. A database is a physical object that stores data.
• D. All of the above.
• Answer: A

What is a relational database?

• A. A relational database is a database that stores data in tables.
• B. A relational database is a database that stores data in graphs.
• C. A relational database is a database that stores data in trees.
• D. All of the above.
• Answer: A

What is a table in a relational database?

• A. A table in a relational database is a collection of rows and columns.
• B. A table in a relational database is a collection of records and fields.
• C. A table in a relational database is a collection of objects and properties.
• D. All of the above.
• Answer: A

What is a row in a relational database?

• A. A row in a relational database is a single record.
• B. A row in a relational database is a single field.
• C. A row in a relational database is a single object.
• D. All of the above.
• Answer: A

What is a column in a relational database?

• A. A column in a relational database is a single field.
• B. A column in a relational database is a single record.
• C. A column in a relational database is a single object.
• D. All of the above.
• Answer: A

What is a primary key in a relational database?

• A. A primary key in a relational database is a unique field that identifies each record.
• B. A primary key in a relational database is a field that cannot be null.
• C. A primary key in a relational database is a field that cannot be duplicated.
• D. All of the above.
• Answer: D

What is a foreign key in a relational database?

• A. A foreign key in a relational database is a field that references a primary key in another table.
• B. A foreign key in a relational database is a field that cannot be null.
• C. A foreign key in a relational database is a field that cannot be duplicated.
• D. All of the above.
• Answer: A

What is a database management system (DBMS)?

• A. A DBMS is a software program that manages data in a database.
• B. A DBMS is a hardware device that manages data in a database.
• C. A DBMS is a physical object that stores data in a database.
• D. All of the above.
• Answer: A

What are the three main types of DBMSs?

• A. Relational DBMSs, hierarchical DBMSs, and network DBMSs.
• B. Relational DBMSs, object-oriented DBMSs, and NoSQL DBMSs.
• C. Hierarchical DBMSs, network DBMSs, and object-oriented DBMSs.
• D. NoSQL DBMSs, object-oriented DBMSs, and relational DBMSs.
• Answer: B

What is a NoSQL database?

What is a query language?

• A. A query language is a language that is used to interact with a database.
• B. A query language is a language that is used to create a database.
• C. A query language is a language that is used to delete a database.
• D. All of the above.
• Answer: A

What is SQL?

• A. SQL is a query language that is used to interact with relational databases.
• B. SQL is a query language that is used to create relational databases.
• C. SQL is a query language that is used to delete relational databases.
• D. All of the above.
• Answer: A

What are the three main types of SQL queries?

• A. SELECT, INSERT, and UPDATE.
• B. SELECT, DELETE, and DROP.
• C. INSERT, UPDATE, and DELETE.
• D. All of the above.
• Answer: A

What is a SELECT query?

• A. A SELECT query is used to select data from a database.
• B. A SELECT query is used to insert data into a database.
• C. A SELECT query is used to update data in a database.
• D. A SELECT query is used to delete data from a database.
• Answer: A

What is an INSERT query?

• A. An INSERT query is used to insert data into a database.
• B. An INSERT query is used to select data from a database.
• C. An INSERT query is used to update data in a database.
• D. An INSERT query is used to delete data from a database.
• Answer: A

What is an UPDATE query?

• A. An UPDATE query is used to update data in a database.
• B. An UPDATE query is used to select data from a database.
• C. An UPDATE query is used to insert data into a database.
• D. An UPDATE query is used to delete data from a database.
• Answer: A

What is a DELETE query?

• A. A DELETE query is used to delete data from a database.
• B. A DELETE query is used to select data from a database.
• C. A DELETE query is used to insert data into a database.
• D. A DELETE query is used to update data in a database.
• Answer: A

What is a join query?

• A. A join query is used to combine data from two or more tables.
• B. A join query is used to select data from a single table.
• C. A join query is used to insert data into a single table.
• D. A join query is used to delete data from a single table.
• Answer: A

What is a subquery?

• A. A subquery is a query that is nested within another query.
• B. A subquery is a query that is used to select data from a single table.
• C. A subquery is a query that is used to insert data into a single table.
• D. A subquery is a query that is used to delete data from a single table.
• Answer: A

What is a stored procedure?