Explanation: SMPS stands for Switched Mode Power Supply. It is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. It transfers power from a DC or AC source (like wall outlet) to PC loads (like motherboard) while changing voltage characteristics.
42
Which is the main page of a website?
✅ Correct Answer:Home Page
Explanation: The Home Page is the main or introductory page of a website. When you type a website's domain name (like www.google.com), the home page is what loads first. It typically serves as a table of contents for the site, providing links to other sections.
43
The binary number system uses only:
✅ Correct Answer:0 and 1
Explanation: The binary number system uses only two digits: 0 and 1. Computers operate in binary, meaning they store data and perform calculations using only these two states (Off and On). All other data like text, images, and sound are converted into binary codes.
44
Which memory is known as 'Flash Memory'?
✅ Correct Answer:Pen Drive
Explanation: A Pen Drive (USB Drive) uses Flash Memory. Flash memory is an electronic non-volatile computer memory storage medium that can be electrically erased and reprogrammed. It is used in memory cards, USB flash drives, and solid-state drives. It is durable and fast.
45
What is the shortcut key to 'Paste' data?
✅ Correct Answer:Ctrl + V
Explanation: Ctrl + V is the universal keyboard shortcut for 'Paste'. It is used to insert data from the clipboard into a document or application. It is usually performed after a Copy (Ctrl+C) or Cut (Ctrl+X) command. The 'V' is said to stand for the downward arrow shape of insertion.
46
Which of the following is an example of 'Utility Software'?
✅ Correct Answer:Antivirus
Explanation: Antivirus is a type of Utility Software. Utility software allows users to configure, analyze, optimize, and maintain a computer. Unlike application software which allows users to perform tasks, utility software focuses on how the computer infrastructure operates. Disk cleaners are another example.
47
Which device is required for Wi-Fi connection?
✅ Correct Answer:Router
Explanation: A wireless router is a device that performs the functions of a router and also includes the functions of a wireless access point. It is used to provide access to the Internet or a private computer network. It sends data via radio waves to devices like phones and laptops.
48
HTML stands for:
✅ Correct Answer:Hyper Text Markup Language
Explanation: HTML stands for Hyper Text Markup Language. It is the standard markup language for creating web pages. It describes the structure of a web page semantically. Web browsers receive HTML documents from a web server and render them into multimedia web pages.
49
Which key combination is used to 'Undo' the last action?
✅ Correct Answer:Ctrl + Z
Explanation: Ctrl + Z is the standard shortcut for 'Undo'. It reverses the most recent change made to the document or file. If you type something by mistake or delete a file accidentally, pressing Ctrl + Z will often fix it instantly. Ctrl + Y is usually used for 'Redo'.
50
What is the full form of PDF?
✅ Correct Answer:Portable Document Format
Explanation: PDF stands for Portable Document Format. It was developed by Adobe in the 1990s to present documents. It captures formatting information from a variety of desktop publishing applications. It makes it possible to send formatted documents and have them appear on the recipient's monitor or printer as they were intended.
51
What does 'OS' stand for?
✅ Correct Answer:Operating System
Explanation: OS stands for Operating System. It is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware. Examples include Windows, macOS, and Linux.
52
Joystick is mainly used for:
✅ Correct Answer:Gaming
Explanation: A joystick is an input device mainly used for playing computer games. It consists of a stick that pivots on a base. It is also used in controlling industrial robots and aircraft simulators.
53
Who invented the computer mouse?
✅ Correct Answer:Douglas Engelbart
Explanation: Douglas Engelbart invented the computer mouse in the 1960s. The first mouse was made of wood and had two wheels. He demonstrated it in 1968 in what is known as 'The Mother of All Demos'.
54
The extension of a text file is usually:
✅ Correct Answer:.txt
Explanation: The file extension '.txt' represents a plain text file. It contains unformatted text. '.bmp' is for images, '.mp3' for audio, and '.exe' for executable programs. Extensions help the OS identify which program to use to open the file.
55
Which of the following is NOT a hardware?
✅ Correct Answer:Java
Explanation: Java is a programming language, which falls under the category of Software. Processor chips, printers, and mice are physical devices that you can touch, so they are Hardware. Java is a set of instructions/code.
56
A collection of 8 bits is called a:
✅ Correct Answer:Byte
Explanation: A collection of 8 bits is called a Byte. Bytes are used to encode a single character of text in a computer. For example, the letter 'A' is represented by a specific pattern of 8 bits.
57
Which language does the computer understand directly?
✅ Correct Answer:Machine Language
Explanation: Computers only understand Machine Language (Binary Code). It consists entirely of 0s and 1s. All other programming languages (High-Level) must be translated into machine language by a compiler or interpreter before the computer can execute them.
58
What is the shortcut key to Copy selected text?
✅ Correct Answer:Ctrl + C
Explanation: Ctrl + C is the universal shortcut key to copy selected text or files. Ctrl + V is used to Paste, Ctrl + X to Cut, and Ctrl + P to Print. These shortcuts work across almost all operating systems and applications.
59
Integrated Circuits (ICs) were used in which generation?
✅ Correct Answer:Third
Explanation: Third-generation computers (1964-1971) used Integrated Circuits (ICs). ICs placed many transistors onto a single silicon chip. This drastically increased the speed and efficiency of computers while reducing their size.
60
What is the function of a Firewall?
✅ Correct Answer:To protect against unauthorized access
Explanation: A firewall is a network security system. It monitors and controls incoming and outgoing network traffic based on predetermined security rules. Its main purpose is to prevent unauthorized access to or from a private network.