Combinational Circuits – 1 – 1

1. An output of combinational circuit depends on :

(a) Present inputs
(b) Previous inputs
(c) Both present and previous
(d) None of above

ANSWER

EXPLANATION

2. Half adder is an example of :

(a) Combinational Circuits
(b) Sequential Circuits
(c) Asynchronous Circuits
(d) None of these

ANSWER

EXPLANATION

3. The relation between the number of inputs (n) and output (O) of binary code decoder is :

(a) O = 2n
(b) O =  2n
(c) O = n+2

(d) O = n/2

ANSWER

EXPLANATION

4. How many inputs are required for a 1 to 10 BCD decoder ?

(a) 1
(b) 4
(c) 8
(d) 10

ANSWER

EXPLANATION

5. A logic circuit which is used to change a BCD number into an equivalent decimal number is :

(a) encoder
(b) decoder
(c) multiplexer
(d) code converter

ANSWER

EXPLANATION

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