Digital Circuits Mock Test 4

10%

Question 1 of 10

1. When performing subtraction by addition in the 2's-complement system is?

The minuend is left in its original form and the subtrahend is changed to its 2's-complement

The minuend is changed to 2's-complement and the subtrahend is left in its original form

The minuend and the subtrahend are both changed to the 2's-complement

The minuend and subtrahend are both left in their original form

Question 1 of 10

Question 2 of 10

2. Fast-look-ahead carry circuits found in most 4-bit full-adder circuits which ___________

Add a 1 to complemented inputs

Increase ripple delay

Reduce propagation delay

Determine sign and magnitude

Question 2 of 10

Question 3 of 10

3. Which of the following expressions is in the sum-of-products form?

A * B + C * D

(A * B)(C * D)

A* B *(CD)

(A + B)(C + D)

Question 3 of 10

Question 4 of 10

4. How many shift registers are used in a 4 bit serial adder?

Question 4 of 10

Question 5 of 10

5. The binary subtraction of 0 – 0 =?

Difference = 1, borrow = 1

Difference = 0, borrow = 0

Difference = 0, borrow = 1

Difference = 1, borrow = 0

Question 5 of 10

Question 6 of 10

6. What is the major difference between half-adders and full-adders?

Full adders can handle double-digit numbers

Full adders have a carry input capability

Full-adders are made up of two half-adders

Half adders can handle only single-digit numbers

Question 6 of 10

Question 7 of 10

7. The two input MUX would have ____________

2 select lines

3 select lines

4 select lines

1 select line

Question 7 of 10

Question 8 of 10

8. In most applications, transistor switches used in place of relays?

All of the Mentioned

They consume less power

They are faster

They are quieter and smaller

Question 8 of 10

Question 9 of 10

9. How many basic binary subtraction operations are possible?

Question 9 of 10

Question 10 of 10

10. Each "0" entry in a K-map square represents _______________

A HIGH for each input truth table condition that produces a HIGH output

A DON'T CARE condition for all possible input truth table combinations

A LOW output for all possible HIGH input conditions

A HIGH output on the truth table for all LOW input combinations

Question 10 of 10