Digital Arithmetic Operations and Circuits problems
- 1. How many inputs must a full-adder have?
Options- A. 2
- B. 3
- C. 4
- D. 5 Also asked in: Bank Exams
Correct Answer: 3
- 2. The summing outputs of a half- or full-adder are designated by which Greek symbol?
Options- A. omega
- B. theta
- C. lambda
- D. sigma Discuss
Correct Answer: sigma
- 3. What is one disadvantage of the ripple-carry adder?
Options- A. The interconnections are more complex.
- B. More stages are required to a full adder.
- C. It is slow due to propagation time.
- D. All of the above. Discuss
Correct Answer: It is slow due to propagation time.
- 4. When 1100010 is divided by 0101, what is the decimal remainder?
Options- A. 2
- B. 3
- C. 4
- D. 6 Discuss
Correct Answer: 3
- 5. It is not necessary to have the same number of bits when adding or subtracting signed binary numbers in the 2's-complement system.
Options- A. True
- B. False Discuss
Correct Answer: False
- 6. The binary subtraction 0 ? 1 = is
difference = 1
borrow = 0
Options- A. True
- B. False Discuss
Correct Answer: False
- 7. The look-ahead-carry adder is slower than the ripple-carry adder because it requires additional logic circuits.
Options- A. True
- B. False Discuss
Correct Answer: False
- 8. There are four possible combinations for subtracting two binary numbers.
Options- A. True
- B. False Discuss
Correct Answer: True
- 9. The 74LS382 ALU is a 24-pin arithmetic/logic unit.
Options- A. True
- B. False Discuss
Correct Answer: False
- 10. Overflow indicators in ALU circuits indicate when add or subtract operations produce results that are too large to fit into four bits.
Options- A. True
- B. False Discuss
Correct Answer: True
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