Computer and Information Technology part -3

Total Questions: 50

1. Windows Software has been developed by: [Uttarakhand P.C.S. (Mains) 2002]

(a) L.B.M
(b) Apple Corporation
(c) WIPRO
(d) None of the above

Correct Answer: (d) None of the above

Solution:

Microsoft Windows is an operating system and a series of graphical user interface developed by Microsoft. Windows 3 was released in 1990 by Microsoft. The most recent Windows released by Microsoft is Windows 11 released in October, 2021.

2. American television and Telegraph has developed such computer procedure which gives multi-user environment, it is called – [R.A.S/R.T.S. (Pre) 1994]

(a) V.G.A
(b) Unix
(c) U.T.A
(d) V.L.S.I.

Correct Answer: (b) Unix

Solution:

The Unix operating system was developed by American Telephone & Telegraph (AT&T) in 1969 and is known for its multi-user and multi-tasking capabilities.

3. Which of the following is an Operating System? [Uttarakhand P.C.S. (Pre) 2016]

(a) UNIX
(b) JAVA
(c) ORACLE
(d) MS-Office

Correct Answer: (a) UNIX

Solution:

UNIX is an operating system. The UNIX operating system is widely used in both servers and workplace.

4. What is not true about GNU operating system? [Chhattisgarh P.C.S. (Pre) 2021]

(a) Its full form is 'GNU's Not Unix'.
(b) It was started by Richard Stallman.
(c) It's an open-source software.
(d) It is not compatible with Unix.

Correct Answer: (d) It is not compatible with Unix.

Solution:

GNU is an extensive collection of free software, which can be used as an operating system or can be used in parts with other operating systems. GNU stands for "GNU's Not Unix," chosen because GNU's design is Unix-like, but differs from Unix by being free software and containing no Unix code. Development of the GNU operating system was initiated by Richard Stallman while he worked at MIT Artificial Intelligence Laboratory. Richard Stallman made the initial announcement of the GNU Project in September, 1983. The GNU operating system is upward-compatible with Unix. Hence, statement of option (d) is not true.

5. Types of computer memory is/are – [Uttarakhand U.D.A/L.D.A. (Pre) 2003]

(1) Semiconductor
(2) Magnetic
(3) Server
(4) Optical

Select the correct answer from the codes given below –

(a) 1 and 2
(b) 2 and 3
(c) 1, 2 and 4
(d) All the four

Correct Answer: (c) 1, 2 and 4

Solution:

The computer memory is of two types, semiconductor or primary memory and secondary memory which is either magnetic or optical. Some examples of secondary memory are Hard Disk, Magnetic Tape, Floppy Disk, Pen Drive, D.V.D. and Compact disc.

6. The memory of the computer is measured by – [U.P.P.C.S. (Mains) 2006]

(a) Bits
(b) Ohms
(c) Amperes
(d) Volts

Correct Answer: (a) Bits

Solution:

The main function of the computer memory is to store data and information. Bit or binary digit is the smallest unit of computer memory. All computers work on a binary numbering system, i.e. they process data in ones and zeros. This 1 or 0 level of storage is called a bit.

7. Binary numbers are – [Uttarakhand P.C.S. (Mains) 2006]

(a) 0 and 1
(b) 0 and 10
(c) 1 and 10
(d) 1 and 100

Correct Answer: (a) 0 and 1

Solution:

Binary describes a numbering scheme in which there are only two possible values for each digit, 0 and 1. The term also refers to any digital encoding/decoding system in which there are exactly two possible states. In digital data memory, for storage, processing, and communication, the 0 and 1 values are often called as "low" and "high" respectively.

8. In Binary Code 7 is written as – [R.A.S/R.T.S. (Pre) 2003]

(a) 0110
(b) 0111
(c) 0101
(d) 0100

Correct Answer: (b) 0111

Solution:

In order to get the binary code of any number, one should always remember the below mentioned details –
Remember the sequence of numbers from right to left so on... 16, 8, 4, 2, 1

Now whichever number's binary code is to be determined write down 1 below that number (that number's conversion in the form of above numbers e.g. 7 = 4 + 2 + 1) and put 0 on rest. Some examples are as follows:

2	0 0 1 0	(Hence binary code of 2 = 0010)
3	0 0 1 1	(Hence binary code of 3 = 0011)
4	0 1 0 0	(Hence binary code of 4 = 0100)
5	0 1 0 1	(Hence binary code of 5 = 0101)
6	0 1 1 0	(Hence binary code of 6 = 0110)
7	0 1 1 1	(Hence binary code of 7 = 0111)
8	1 0 0 0	(Hence binary code of 8 = 1000)
9	1 0 0 1	(Hence binary code of 9 = 1001)

Divide by 2 and record the remainder:

- $7 \div 2 = 3$ remainder $1$
- $3 \div 2 = 1$ remainder $1$
- $1 \div 2 = 0$ remainder $1$
Read the remainders in reverse order: The remainders, from bottom to top, are 0, $1, 1, 1$ .

Therefore, the binary code for 7 is 0111.

So by this method, you can calculate binary code of any given number. Hence option (b) is correct.

9. Binary language consists of how many digits? [M.P.P.C.S. (Pre) 2015]]

(a) 2
(b) 3
(c) 4
(d) 16

Correct Answer: (a) 2

Solution:

The modern computer is also known as the digital computer and only understands binary language. Binary language consists of two digits 0 and 1. It is also known as machine language.

10. Which of the following is a self-complementing code? [U.P. Lower Sub. (Mains) 2013]

(a) 8421 code
(b) 5211 code
(c) 5421 code
(d) Binary code

Correct Answer: (b) 5211 code

Solution:

If a code is constructed in such a way that when we replace 1 by 0 and 0 by 1 in the 4-bit code representation of a digit, it is called a self-complementing code. For example, the (2421) and the (5211) codes are self-complementing. A necessary condition for a self-complementing weighted code is that the sum of its weights be 9. Digit 8421 and 5421 codes are not self-complementing codes whereas 5211, 2421, 3321, 4311 are self-complementing.

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Computer and Information Technology part -3

1. Windows Software has been developed by: [Uttarakhand P.C.S. (Mains) 2002]

2. American television and Telegraph has developed such computer procedure which gives multi-user environment, it is called – [R.A.S/R.T.S. (Pre) 1994]

3. Which of the following is an Operating System? [Uttarakhand P.C.S. (Pre) 2016]

4. What is not true about GNU operating system? [Chhattisgarh P.C.S. (Pre) 2021]

5. Types of computer memory is/are – [Uttarakhand U.D.A/L.D.A. (Pre) 2003]

6. The memory of the computer is measured by – [U.P.P.C.S. (Mains) 2006]

7. Binary numbers are – [Uttarakhand P.C.S. (Mains) 2006]

8. In Binary Code 7 is written as – [R.A.S/R.T.S. (Pre) 2003]

9. Binary language consists of how many digits? [M.P.P.C.S. (Pre) 2015]]

10. Which of the following is a self-complementing code? [U.P. Lower Sub. (Mains) 2013]

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