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Home ‣ Digital Electronics ‣ Digital Arithmetic Operations and Circuits Comments
- Question
Fast-look-ahead carry circuits found in most 4-bit full-adder circuits:
Options- A. determine sign and magnitude
- B. reduce propagation delay
- C. add a 1 to complemented inputs
- D. increase ripple delay
- Correct Answer
- reduce propagation delay
- 1. A half-adder circuit would normally be used each time a carry input is required in an added circuit.
Options- A. True
- B. False Discuss
- 2. Which of the following is the primary advantage of using binary-coded decimal (BCD) instead of straight binary coding?
Options- A. Fewer bits are required to represent a decimal number with the BCD code.
- B. BCD codes are easily converted from decimal.
- C. the relative ease of converting to and from decimal
- D. BCD codes are easily converted to straight binary codes. Discuss
- 3. Perform subtraction on each of the following binary numbers by taking the two's-complement of the number being subtracted and then adding it to the first number.
01001 01100
00011 00111
Options- A. 01100 10011
- B. 00110 00101
- C. 10110 10101
- D. 00111 00100 Discuss
- 4. Solving ?11 + (?2) will yield which two's-complement answer?
Options- A. 1110 1101
- B. 1111 1001
- C. 1111 0011
- D. 1110 1001 Discuss
- 5. Solve this binary problem: 01110010 ? 01001000 =
Options- A. 00011010
- B. 00101010
- C. 01110010
- D. 00111100 Discuss
- 6. Solve the following:
Options- A. 10011110
- B. 01211110
- C. 000100000100
- D. 001000001000 Discuss
- 7. Solve this binary problem: 01000110 ÷ 00001010 =
Options- A. 0111
- B. 10011
- C. 1001
- D. 0011 Discuss
- 8. One way to make a four-bit adder perform subtraction is by:
Options- A. inverting the output.
- B. inverting the carry-in.
- C. inverting the B inputs.
- D. grounding the B inputs. Discuss
- 9. The two's-complement system is to be used to add the signed numbers 11110010 and 11110011. Determine, in decimal, the sign and value of each number and their sum.
Options- A. ?14 and ?13, ?27
- B. ?113 and ?114, 227
- C. ?27 and ?13, 40
- D. ?11 and ?16, ?27 Discuss
- 10. Solve this BCD problem: 0100 + 0110 =
Options- A. 00010000BCD
- B. 00010111BCD
- C. 00001011BCD
- D. 00010011BCD Discuss
Digital Arithmetic Operations and Circuits problems
Search Results
Correct Answer: False
Correct Answer: the relative ease of converting to and from decimal
Correct Answer: 00110 00101
Correct Answer: 1111 0011
Correct Answer: 00101010
Correct Answer: 000100000100
Correct Answer: 0111
Correct Answer: inverting the B inputs.
Correct Answer: ?14 and ?13, ?27
Correct Answer: 00010000BCD
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