Electronics and Communication Engineering - Digital Electronics

1. 

Consider the following statements: A multiplier

  1. selects one of the several inputs and steers it to the output
  2. routes the data from a single input to many outputs
  3. converts parallel data into serial data
  4. is a combinational circuit
On the above statements which are correct?

A. 1, 2, 4
B. 2, 3, 4
C. 1, 3, 4
D. 1, 2, 3

Answer: Option C

Explanation:

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2. 

In the full adder, denoting Sum by S and carry by C

A. S = 1 when two or more inputs are unity
B. C = 1 when two or more inputs are unity
C. C = 1 when all the inputs are unity
D. S = 1 when all the inputs are unity

Answer: Option B

Explanation:

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3. 

Each term in POS form is called max terms.

A. True
B. False

Answer: Option A

Explanation:

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4. 

When signed numbers are used in binary arithmetic, which of the following has unique representation for zero?

A. Sign-magnitude
B. 1's complement
C. 2's complement
D. 9's complement

Answer: Option C

Explanation:

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5. 

Which of the following characteristics is not true for TTL Logic?

A. Good speed
B. Low power dissipation per gate
C. High cost
D. None of these

Answer: Option C

Explanation:

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