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- Question
Convert each of the decimal numbers to 8-bit two's-complement form and then perform subtraction by taking the two's-complement and adding.
Options- A. 0001 0011
- B. 0000 1110
- C. 0010 1110
- D. 1110 0000
- Correct Answer
- 0000 1110
- 1. Which of the following is correct for full adders?
Options- A. Full adders have the capability of directly adding decimal numbers.
- B. Full adders are used to make half adders.
- C. Full adders are limited to two inputs since there are only two binary digits.
- D. In a parallel full adder, the first stage may be a half adder. Discuss
- 2. The carry propagation delay in 4-bit full-adder circuits:
Options- A. is cumulative for each stage and limits the speed at which arithmetic operations are performed
- B. is normally not a consideration because the delays are usually in the nanosecond range
- C. decreases in direct ratio to the total number of full-adder stages
- D. increases in direct ratio to the total number of full-adder stages, but is not a factor in limiting the speed of arithmetic operations Discuss
- 3. Determine the two's-complement of each binary number.
00110 00011 11101
Options- A. 11001 11100 00010
- B. 00111 00010 00010
- C. 00110 00011 11101
- D. 11010 11101 00011 Discuss
- 4. The range of positive numbers when using an eight-bit two's-complement system is:
Options- A. 0 to 64
- B. 0 to 100
- C. 0 to 127
- D. 0 to 256 Discuss
- 5. If [A] = 1011 1010, [B] = 0011 0110, and [C] = [A] ? [B], what is [C 4..2] in decimal?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 6. Add the following hex numbers: 011016 + 1001016
Options- A. 1012016
- B. 1002016
- C. 1112016
- D. 0012016 Discuss
- 7. The binary subtraction 0 ? 0 =
Options- A. difference = 0
borrow = 0 - B. difference = 1
borrow = 0 - C. difference = 1
borrow = 1 - D. difference = 0
borrow = 1
Discuss
- 8. How many inputs must a full-adder have?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 9. 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
- 10. 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
Digital Arithmetic Operations and Circuits problems
Search Results
Correct Answer: In a parallel full adder, the first stage may be a half adder.
Correct Answer: is cumulative for each stage and limits the speed at which arithmetic operations are performed
Correct Answer: 11010 11101 00011
Correct Answer: 0 to 127
Correct Answer: 4
Correct Answer: 1012016
Correct Answer: difference = 0
borrow = 0
Correct Answer: 3
Correct Answer: sigma
Correct Answer: It is slow due to propagation time.
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