Discussion
Home ‣ Digital Electronics ‣ Digital Arithmetic Operations and Circuits See What Others Are Saying!
- Question
When decimal numbers with several digits are to be added together using BCD adders ________.
Options- A. a separated BCD adder is required for each digit position
- B. the BCD adders must have the carry-outs grounded
- C. the BCD's must be grouped in twos
- D. full adders are also used
- Correct Answer
- a separated BCD adder is required for each digit position
- 1. The range of negative numbers when using an eight-bit two's-complement system is ?1 to ?128.
Options- A. True
- B. False Discuss
- 2. A binary number's value changes most drastically when the ________ is changed.
Options- A. MSB
- B. frequency
- C. LSB
- D. duty cycle Discuss
- 3. When the term RAM is used with semiconductor memories, it usually means ________ as opposed to ROM.
Options- A. Random-Access Memory
- B. Read/Write Memory (RWM)
- C. flash memory
- D. temporary storage Discuss
- 4. The minimum input voltage recognized as HIGH by a TTL gate is ________.
Options- A. 2.0 V
- B. 2.4 V
- C. 0.8 V
- D. 5.0 V Discuss
- 5. Which of the following combinations of logic gates can decode binary 1101?
Options- A. One 4-input AND gate
- B. One 4-input AND gate, one OR gate
- C. One 4-input NAND gate, one inverter
- D. One 4-input AND gate, one inverter Discuss
- 6. When data input I4 of a 74148 octal-to-binary encoder is active, the data output is:
A0 = 1
A1 = 1
A2 = 0
Options- A. True
- B. False Discuss
- 7. The half-step sequence of a stepper motor is created by inserting a start with only one coil energized between full steps.
Options- A. True
- B. False Discuss
- 8. Is the propagation delay from the clock to the output for the 7476 the same as the delay from the set or reset to the output?
Options- A. yes
- B. no Discuss
- 9. The number of 16k × 4 memories needed to construct a 128k × 8 memory is ________.
Options- A. 4
- B. 8
- C. 12
- D. 16 Discuss
- 10. Memory devices that use electronic latching circuits are called ________.
Options- A. RAM
- B. flip-flops
- C. magnetic tape
- D. DRAM Discuss
More questions
Correct Answer: True
Correct Answer: MSB
Correct Answer: Read/Write Memory (RWM)
Correct Answer: 2.0 V
Correct Answer: One 4-input AND gate, one inverter
Correct Answer: True
Correct Answer: True
Correct Answer: yes
Correct Answer: 16
Correct Answer: flip-flops
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