Electronics and Communication Engineering - Digital Electronics

46. 

The number of flip-flops required to build a mod-19 counter is

A. 4
B. 5
C. 6
D. 7

Answer: Option C

Explanation:

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47. 

The number of flip-flops needed to divide the input frequency by 32 is

A. 2
B. 4
C. 5
D. 16

Answer: Option C

Explanation:

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48. 

Given two numbers A and B in sign magnitude representation in an eight bit format A = 00011110 and B = 10011100 then A ⊕ B gives

A. 10000010
B. 00011111
C. 10011101
D. 11100001

Answer: Option A

Explanation:

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49. 

The 8086 arithmetic instruction work on

  1. signed and unsigned numbers
  2. ASCII data
  3. unpacked BCD data
Select the correct answer using the codes given below :

A. 1 and 2
B. 1 and 3
C. 2 and 3
D. 1, 2 and 3

Answer: Option C

Explanation:

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50. 

For the K map of the given figure the simplified Boolean expression is

A. A + BC
B. A + BC
C. A + B C
D. A + B C

Answer: Option A

Explanation:

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