Computer Architecture Multiple choice Questions and Answers-Digital Data Representation

41.	Which of the following code is also known as reflected code?
a.	Excess-3 code
b.	Gray code
c.	Straight binary code
d.	Error code

Discuss

Answer: (b).Gray code

42.	EXOR is the __________ of the binary number.
a.	MSB to the next bit
b.	LSB to the next bit
c.	MSB of the previous bit
d.	LSB of the previous bit

Discuss

Answer: (a).MSB to the next bit

43.	ASCII code is required for representing more than ________ characters.
a.	16
b.	8
c.	64
d.	32

Discuss

Answer: (c).64

44.	Why the 8-bit (MSB) is added in EBCDIC?
a.	For carriage return
b.	For making the total number of 1’s odd
c.	For line feed
d.	For parity

Discuss

Answer: (d).For parity

45.	What is the 8-bit EBCDIC representation of alphabet M?
a.	1100100
b.	11001001
c.	11010100
d.	010001

Discuss

Answer: (c).11010100

46.	Which of the following is not correct regarding EBCDIC?
a.	It is used to represent more than 64 characters.
b.	It is a 7-bit code.
c.	A maximum of 128 different characters can be represented by this code.
d.	None of the above

Discuss

Answer: (b).It is a 7-bit code.

47.	The MSB of _____________ is same as the MSB of the corresponding Gray code.
a.	Alphanumeric code
b.	Excess-3 code
c.	Binary code
d.	Gray code

Discuss

Answer: (c).Binary code

Discuss

Answer: (a).0000 1000

49.	In N-bits, you can represent the signed integers ranging from ___________.
a.	2 ^(N-1) to 2^ (N+1)
b.	-2^(N-1) to 2^(N-1) -1
c.	2 ^(N+1) to 2^(N-1) +1
d.	2^ (N) to 2^ (N+1)

Discuss

Answer: (b).-2^(N-1) to 2^(N-1) -1

50.	How -5 is represented in hex format in 2’s complement in 8-bits?
a.	(FB)16
b.	(7F)16
c.	(FF)16
d.	(FA)16

Discuss

Answer: (a).(FB)16