16. World’s first commercially available general purpose computer was ?

[A] Ferranti Mark-I

[B] Manchester Mark-I

[C] Manchester Baby

[D] Colossus Mark-I

View Answer

ANSWER: Option(A).


MEMORY: No memory available.

17. The Smallest unit of data in a computer is called ?

[A] Kb

[B] Bit

[C] Byte

[D] Nibble

View Answer

ANSWER: Option(B).


MEMORY: Bit is the smallest unit of digital information which is either 0 or 1.

18. How many bits make one nibble ?

[A] 2 bits

[B] 4 bits

[C] 8 bits

[D] 16 bits

View Answer

ANSWER: Option(B).


MEMORY: No memory available.

19. How many bits make one byte/octet ?

[A] 4 bits

[B] 8 bits

[C] 16 bits

[D] 32 bits

View Answer

ANSWER: Option(B).


MEMORY: Combination of 8 bits make one byte. It is also knowns as one octet. The term ‘OCTET’ is used to avoid ambiguity, beacause, some old computers had different number of bits per byte. It is mainly used to describe IP addresses.

20. Central Processing Unit (CPU) consists of ?

[A] ALU

[B] CU

[C] Registers

[D] All of the above

View Answer

ANSWER: Option(D).


MEMORY: No memory available.