Computer (Part-2)

21. _________perform Internet Protocol blocking to protect networks from unauthorized access. [S.S.C. Online CHSL (T-1) 29.01.2017 (Shift-II)]

(a) Firewalls
(b) Proxy Servers
(c) Routers
(d) VoIP

Correct Answer: (a) Firewalls

Solution:A firewall is a network security system that monitors and controls both incoming and outgoing network traffic, thus protecting the network from unauthorized access.

22. Which circuit is used to store one bit of data? [S.S.C. Online Graduation Level (T-1) 8.09.2016 (Shift-III)]

(a) Register
(b) Flip Flop
(c) Vector
(d) Encoder

Correct Answer: (b) Flip Flop

Solution:In electronics, a flip-flop or latch is a circuit that has two stable states and can be used to store state information. A flip-flop stores a single bit (binary digit) of data; one of its two states represents a "one" and the other represents a "zero". Such data storage can be used for storage of state, and such a circuit is described as sequential logic.

23. What is the storage capacity of a commonly used floppy disk? [S.S.C. Online C.P.O.S.L. (T-1) 3.07.2017 (Shift-II)]

(a) 2.0 MB
(b) 4.0 MB
(c) 1.44 MB
(d) 2.44 MB

Correct Answer: (c) 1.44 MB

Solution:The most commonly used floppy disks are 3.5 inches high density floppy disk with a standard storage size of 1.44 MB. The high-density floppy disk drive was first introduced in 1984.

24. 'Nibble' in computer terminology is also called _________. [S.S.C. Online CHSL (T-1) 17.03.2020 (Shift-1)]

(a) Byte
(b) Half bit
(c) Half byte
(d) Bit

Correct Answer: (c) Half byte

Solution:Nibble is also known as half-byte or tetrade and has sixteen possible values represented by a hex digit. It is used to state the memory consumption to store a digit in packed decimal format within an IBM mainframe to enhance the computation and the process of debugging.

25. What is the storage capacity of a commonly used floppy disk? [S.S.C. Online C.P.O.S.L. (T-1) 3.07.2017 (Shift-II)]

(a) 2.0 MB
(b) 4.0 MB
(c) 1.44 MB
(d) 2.44 MB

Correct Answer: (b) 4.0 MB

Solution:The most commonly used floppy disks are 3.5 inches high density floppy disk with a standard storage size of 1.44 MB. The high-density floppy disk drive was first introduced in 1984.

26. How many KB is equal to 1 GB? [S.S.C. Online CHSL (T-1) 19.01.2017 (Shift-III)]

(a) 1024
(b) 256 × 1024
(c) 1024 × 1024
(d) 1024 × 1024 ×128

Correct Answer: (c) 1024 × 1024

Solution:As we know that
1 GB = 1024MB
1 MB = 1024KB
Therefore; 1 GB = 1024 ×1024 KB

27. One terabyte is equal to how many megabytes? [S.S.C. Online CHSL (T-1) 27.01.2017 (Shift-3)]

(a) 256
(b) 512
(c) 1024
(d) 1024 × 1024

Correct Answer: (d) 1024 × 1024

Solution:As we know that
1 GB = 1024MB
1 MB = 1024KB
Therefore; 1 GB = 1024 ×1024 KB

28. How many terabytes make one petabyte? [S.S.C. Online CHSL (T-1) 5.08.2021 (Shift-II)]

(a) 1084
(b) 1042
(c) 1048
(d) 1024

Correct Answer: (d) 1024

Solution:There are 1024 terabytes (or 1 million gigabytes) in a petabyte

29. Which of the following is equivalent to 1 Kilobyte? [S.S.C. Online CHSL (T-1) 20.01.2017 (Shift-1)]

(a) 128 Bytes
(b) 256 Bytes
(c) 512 Bytes
(d) 1024 Bytes

Correct Answer: (d) 1024 Bytes

Solution:One kilobyte is equal to 1024 bytes. Many people think that there are 1000 bytes in a kilobyte. After all, "kilo" means 1000. In most cases, this approximation is fine for determining how much space a file takes up or how much disk space you have. But there are really 1024 bytes in a kilobyte.

30. In the context of computing, a byte is equal to ________ bits. [S.S.C. Online CHSL (T-1) 15.10.2020 (Shift-1)]

(a) 8
(b) 16
(c) 24
(d) 4

Correct Answer: (a) 8

Solution:A byte consists of 8 binary digits (bits), each of which consists of a 0 or 1. A single byte can be used to represent 28 or 256 different values.