Digital Circuits Mock Test 3

10%

Question 1 of 10

1. If A, B and C are the inputs of a full adder then the carry is given by __________

A AND B OR (A OR B) AND C

A OR B OR (A AND B) C

(A AND B) OR (A AND B)C

A XOR B XOR (A XOR B) AND C

Question 1 of 10

Question 2 of 10

2. Procedure for the design of combinational circuits are:

A. From the word description of the problem, identify the inputs and outputs and draw a block diagram.
B. Draw the truth table such that it completely describes the operation of the circuit for different 
combinations of inputs.
C. Simplify the switching expression(s) for the output(s).
D. Implement the simplified expression using logic gates.
E. Write down the switching expression(s) for the output(s).

A, B, E, C, D

A, D, E, B, C

B, C, D, E, A

B, A, E, C, D

Question 2 of 10

Question 3 of 10

3. If A, B and C are the inputs of a full adder then the sum is given by __________

A OR B AND C

A OR B OR C

A XOR B XOR C

A AND B AND C

Question 3 of 10

Question 4 of 10

4. CVSL means _____________

Complementary Voltage Switch Logic

Cascode Voltage Switch Logic

Cascade Voltage Switch Logic

Complemented Voltage Switch Logic

Question 4 of 10

Question 5 of 10

5. Low-voltage positive emitter-coupled logic (LVPECL) is a power optimized version of __________

ECL

VECL

LECL

PECL

Question 5 of 10

Question 6 of 10

6. CMOS behaves as a/an ____________

Inverter

Subtractor

Adder

Comparator

Question 6 of 10

Question 7 of 10

7. Which insulating layer used in the fabrication of MOSFET?

Silicon Nitride

Silicon dioxide

Aluminium Nitrate

Aluminium oxide

Question 7 of 10

Question 8 of 10

8. The flag bits in an ALU is defined as ___________

The status bit conditions

The total number of registers

All of the Mentioned

The total number of control lines

Question 8 of 10

Question 9 of 10

9. Let the input of a subtractor is A and B then what the output will be if A = B?

Question 9 of 10

Question 10 of 10

10. What is used to higher the speed of operation in MOSFET fabrication?

Silicon nitride

Silicon dioxide

Poly silicon gate

Ceramic gate

Question 10 of 10