Railway Science (Computer – Units of Memory)

Total Questions: 6

1. Computer memory is made up of a large number of cells. Each cell is capable of storing ______ of information in the form of binary numbers. [RRB NTPC CBT - II (16/06/2022) Shift 3]

Correct Answer: (b) one bit
Solution:

A computer bit is a binary value. Everything in a computer is 0's and 1's, a byte is equal to 8 bits. Two bits are called a crumb, four bits are called a nibble, and eight bits are called 1 byte.

2. 1 Petabyte = ______ [RRB NTPC CBT - I (19/01/2021) Morning]

Correct Answer: (b) 1024 TB
Solution:

8 bits = 1 Byte, 1024 Bytes = 1 Kilobyte, 1024 Kilobyte = 1 Megabyte, 1024 Megabyte= 1 Gigabyte, 1024 Gigabyte= 1 Terabyte, 1024 Terabyte = 1 Petabyte, 1024 Petabyte = 1 Exabyte, 1024 Exabytes= 1 Zettabyte, 1024 Zettabytes= 1 Yottabyte, 1024 Yottabytes =1 Brontobyte, 1024 Brontobytes= 1 Geopbyte.

3. In Computer terminology, what is a nibble ? [RRB NTPC CBT - I (23/01/2021) Morning]

Correct Answer: (a) Half a byte
Solution:

1 Nibble = 4 bit.

4. How many different values can be stored by a 32 bit register ? [RRB NTPC CBT - I (29/01/2021) Morning]

Correct Answer: (a) 2³²

5. In the context of computing, which among the following is the correct order? [RRB NTPC CBT - I (09/02/2021) Morning]

Correct Answer: (a) TB > GB > MB > KB
Solution:

Correct order --- TB > GB > MB > KB . TB - terabyte, GB - gigabyte , MB - megabyte , KB - kilobyte.

6. 10 nibbles are equal to _______ bits. [RRB NTPC CBT - I ( 15/03/2021) Morning]

Correct Answer: (c) 40
Solution:

1 nibble = 4 bits, so, 10 nibbles = 10 × 4 = 40 bits.