Electronics and Communication Engineering - Digital Electronics

16. 

A16 X 216 __________ .

A. 1616
B. 1516
C. 1416
D. 1316

Answer: Option C

Explanation:

A16 = 10, 216 = 2, 10 x 2 = 20 in decimal = 14 in hexadecimal.


17. 

For the binary number 11101000, the equivalent hexadecimal number is

A. F 9
B. F 8
C. E 9
D. E 8

Answer: Option D

Explanation:

11 01000 = 128 + 64 + 32 + 8 = 232 in decimal = E 8 in hexadecimal.


18. 

AECF116 + 15ACD16 = __________ .

A. C47BB16
B. C47BE16
C. A234F16
D. A111116

Answer: Option B

Explanation:

Convert to decimal, add and change the result to hexadecimal.


19. 

A XOR gate has inputs A and B and output Y. Then the output equation is

A. Y = AB
B. Y = AB + A B
C. Y = A B + A B
D. Y = A B + A B

Answer: Option C

Explanation:

XOR gate recognises odd number of 1's.


20. 

Wired AND connection can be used in TTL with totem pole output.

A. True
B. False

Answer: Option B

Explanation:

F, No it cannot be used.