Most Important KVS PGT/TGT/PRT 2022 Computer Knowledge Questions with Solutions

1. Ans. B. 

A CD–ROM is a pre-pressed optical compact disc which contains data. The name is an acronym which stands for Compact Disc Read-Only Memory. Computers can read CD–ROMs, but cannot write to CD–ROMs which are not writable or erasable. Keep in mind that drives such as a CD–ROM, DVD, Floppy diskette drive, and a USB Flash drive may be capable of sending information to a computer, but they are not input devices. They are considered storage devices. Hence CD-Rom is an output device.

2. Ans. D. 

An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by a computer that converts the electronically generated information into human-readable form. Examples of the output device include monitors, projectors, speakers, headphones and printers.

3. Ans. B. 

The difference between a PROM and a ROM (read-only memory) is that a PROM is manufactured as blank memory, whereas a ROM is programmed during the manufacturing process. To write data onto a PROM chip, you need a special device called a PROM programmer or PROM burner.

4. Ans. B. 

Complementary metal-oxide semiconductor (CMOS) is a technology for constructing integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM and other digital logic circuits.

5. Ans. A. 

• Random-access memory (RAM) is a form of computer data storage. A random-access memory device allows data items to be accessed (read or written) in almost the same amount of time irrespective of the physical location of data inside the memory.
• In contrast, with other direct-access data, storage media such as hard disks, CD-RWs, DVD-RWs and the older drum memory, the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement delays.

6. Ans. D. 

Magnetic Ink Character Recognition Code (MICR Code) is a character-recognition technology used mainly by the banking industry to ease the processing and clearance of cheques and other documents.

7. Ans. C. 

The hardware device commonly referred to as the “brain” of the computer is the CPU.
A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

8. Ans. B. 

A sound card is used to generate sound and provides audio output to external devices like speakers and headphones.

9. Ans. B. 

The full form of LCD is Liquid Crystal Display. A liquid crystal display is a special thin flat panel that can let the light go through it or can block the light. The panel is made up of several blocks and each block can be in any shape.

10. Ans. B. 

The shift key is a modifier key on a keyboard, used to type capital letters and other alternate upper characters. There are typically two shift keys, on the left and right sides of the row below the home row. The shift key’s name originated from the typewriter, where one had to press and hold the button to shift up the case stamp to change to capital letters
The shift key is a modifier key on a keyboard, used to type capital letters and other alternate upper characters. There are typically two shift keys, on the left and right sides of the row below the home row. The shift key’s name originated from the typewriter, where one had to press and hold the button to shift up the case stamp to change to capital letters

11. Ans. E. 

A supercomputer is a computer that performs at or near the currently highest operational rate for computers.
Traditionally, supercomputers have been used for scientific and engineering applications that must handle very large databases or do a great amount of computation (or both).

12. Ans. A. 

A byte is a unit of digital information that most commonly consists of eight bits.
Each 1 or 0 in a binary number is called a bit.
From there, a group of 4 bits is called a nibble, and 8–bits makes a byte. Bytes are a pretty common buzzword when working in binary.
Note:-The byte was the number of bits used to encode a single character of text in a computer and it is the smallest addressable unit of memory in many computer architectures.

13. Ans. E. 

ASCII, abbreviated from American Standard Code for Information Interchange, is a character-encoding scheme. ASCII codes represent text in computers, communications equipment and other devices that use text.
Note:- ASCII developed from telegraphic codes. Its first commercial use was as a seven-bit teleprinter code promoted by Bell data services.

14. Ans. C. 

WAP(Wireless Application Protocol) is a technical standard for accessing information over a mobile wireless network.

15. Ans. A. 

The scrambling of code is known as encryption. It is the process of converting information or data into a code, especially to prevent unauthorized access.

16. Ans. C. 

A filename (also written as two words, file name) is a name used to uniquely identify a computer file stored in a file system.
A filename may include one or more of these components:
(i) host (or node or server) – network device that contains the file
(ii) device (or drive) – hardware device or drive
(iii) directory (or path) – directory tree (e.g.,/usr/bin., \TEMP, [USR.LIB.SRC], etc.)
(iv) file – base name of the file
(v) type (format or extension) – indicates the content type of the file (e.g., .txt, .exe, .COM, etc.)
(vi) version – revision or generation number of the file

17. Ans. A. 

1024 Bytes = 1 KiloByte (KB)

18. Ans. E. 

Double-click on one of the existing worksheet names. Right-click on an existing worksheet name, then choose Rename from the resulting Context menu. Select the worksheet you want to rename (click on the worksheet tab) and then select the Sheet option from the Format menu.

19. Ans. E. 

In Excel, move somewhere in a row you want to hide and press Ctrl+9. The entire current row is hidden and you don’t need to select the entire row, just have your cursor somewhere in the row.

20. Ans. B. 

An Excel worksheet is a single spreadsheet that contains cells organized by rows and columns.
Note:- A worksheet begins with row number one and column A. Each cell can contain a number, text or formula.

21. Ans. C. 

Ctrl+R is using the Fill Right command to copy the contents and format of the leftmost cell of a selected range into the cells to the right.

22. Ans. C. 

The shortcut key – F7 helps the user to check the spelling and grammar of the selected text or document.

23. Ans. C. 

Anything which we typed in a worksheet appears in both the active cell and formula bar.

24. Ans. D. 

The shortcut key Ctrl + F is used for opening the Find dialogue box.

25. Ans. B. 

Editing is the process of selecting and preparing written, visual, audible and film media used to convey information.
Note: The editing process can involve correction, condensation, organization, and many other modifications performed with an intention of producing correct, consistent, accurate and complete work.

26. Ans. D. 

A gutter margin adds extra space to the side margin, top margin, or inside margins of a document that you plan to bind.

A gutter margin helps ensure that text isn’t obscured by the binding.

27. Ans. C. 

The file is a collection of data that can be stored in a disk with the help of some extension like .exe,.png,.dat,.html all are extensions of a file name if I want to store file in a HTML format then we add an extension of a file (.html)

28. Ans. D. 

File extensions are used in order to identify the file type.

29. Ans. A. 

The Recycle Bin is used by Windows computers to store deleted items. It temporarily stores files and folders before they are permanently deleted.
Note:- The user can open the Recycle Bin by double-clicking the icon on the Windows desktop.

30. Ans. D. 

A computer file is a resource for storing information, which is available to a computer program and is usually based on some kind of durable storage. A file is durable in the sense that it remains available for other programs to use after the program that created it has finished executing. Computer files can be considered as the modern counterpart of paper documents which traditionally are kept in office and library files, and this is the source of the term.