Computer and Information Technology (Physics) Part-IV

Total Questions: 50

1. With relation to computers ALU mean: [Uttarakhand P.C.S. (Pre) 2005]

Correct Answer: (b) Arithmetic Logic Unit
Solution:

Arithmetic Logic Unit (ALU) is responsible for performing calculations and contains decision-making mechanisms. In the computer system, ALU is a main component of the central processing unit (CPU), which performs all arithmetic and logic operations that must be performed on instruction words.

2. In computers Dictionary, the letters CD is used for:- [R.A.S/RT.S. (Pre) 2003]

Correct Answer: (a) Compact disc
Solution:

CD Compact Disc, Some other abbreviations are:- E-mail - Electronic Mail, IC-Integrated Circuit, IP-Internet Protocol, LAN - Local Area Network, CAD - Computer Aided Design.

3. Computer hardware, which can store a very large quantity of data, is called: [Uttarakhand P.C.S. (Pre) 2002, U.P.P.C.S. (Pre) 1999]

Correct Answer: (c) Both (a) and (b)
Solution:

Magnetic tape and magnetic disk both are capable of storing a very large quantity of data. However, in comparison to magnetic tape, a magnetic disk is able to store more data. Before the invention of hard disk, magnetic tapes were widely used.

4. A new optical dise format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD? [I.A.S. (Pre) 2011]

1. DVD supports Standard Definition video while BD supports High Definition video.

2. Compared to a DVD, the BD format has several times more storage capacity.

3. Thickness of BD is 2.4 mm while that of DVD is 1.2 mm.

Which of the statements given above is/are correct?

Correct Answer: (b) 1 and 2
Solution:

Blu-ray Disc (BD) is a digital optical disk data storage format. It was designed to supersede the DVD format, which is capable of storing high-definition video resolution (1080p). While DVD supports Standard Definition Video. The common blu-ray disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs.

Conventional (pre-BD-XL) Blue-ray discs contain 25 GB per layer, with dual layer discs (50 GB) being the industry standard for feature-length video discs. Triple layer discs (100 GB) and quadruple layers (128 GB) are available for BD-XL re-writer drives.

5. Which of the following is not a computer hardware? [Uttrakhand U.D.A./L.D.A. (Mains) 2006]

Correct Answer: (b) Compiler
Solution:

Compiler is not a computer hardware. It is a special program that processes statements written in a particular programming language and converts them into machine language or "code" which computer's processor uses.

6. Which of the following is not a hardware? [Uttarakhand Lower Sub. (Pre) 2010]

Correct Answer: (c) Assembler
Solution:

Among the given options assembler is not a hardware. It is a software program that takes basic computer instructions and converts them into a pattern of bits that the computer's processor can use to perform its basic operations.

7. Which of the following is not a computer hardware? [M.P.P.C.S. (Pre) 2013]

Correct Answer: (d) Excel
Solution:

Computer hardware is the physical components of a computer that we can see and touch. Examples: Monitor, CPU, Keyboard, Mouse, Printer and Scanner. Excel is a software developed by Microsoft.

8. Which of the following is not a hardware? [Uttarakhand P.C.S. (Pre) 2006]

Correct Answer: (d) Operating system
Solution:

Operating system is not a hardware but a software program. While printer, mouse, and keyboard are hardware devices.

9. Which of the following is a software- [Uttarakhand Lower Sub. (Pre) 2010]

Correct Answer: (c) Compiler
Solution:

Compiler is a part of computer system software. A compiler converts programming language to machine level language which is understood by the computer.

10. Which of the following is not an open source software? [Jharkhand P.C.S. (Pre) 2016]

Correct Answer: (a) Internet explorer
Solution:

Internet explorer is a closed source software while others are open source software.