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- Question
When the inputs to a flip-flop are changing at the same time that the active trigger edge of the input clock is making its transition, this condition is called:
Options- A. racing
- B. toggling
- C. slave loading
- D. pulse timing
- Correct Answer
- racing
- 1. Select the response that best describes the use of the Master Reset on typical 4-bit binary counters.
Options- A. When MR1 and MR2 are both HIGH, all Qs will be reset to zero.
- B. When MR1 and MR2 are both HIGH, all Qs will be reset to one.
- C. MR1 and MR2 are provided to synchronously reset all four flip-flops.
- D. To enable the count mode, MR1 and MR2 must be held LOW. Discuss
- 2. What is the defining difference between microprocessor/DSP systems and other digital systems?
Options- A. The digital system follows a programmed sequence of instructions that the designer specified.
- B. The microprocessor follows a programmed sequence of instructions that the designer specified.
- C. The digital system is faster.
- D. The microprocessor/DSP is faster. Discuss
- 3. Which of the following testing procedures uses the JTAG IEEE standard?
Options- A. Bed-of-nails
- B. Flying probe
- C. EXTEST
- D. Boundary scan Discuss
- 4. One positive pulse with tw = 75 µs is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with tw = 15 µs is applied to the other input beginning 20 µs after the leading edge of the first pulse. Which statement describes the output in relation to the inputs?
Options- A. The exclusive-OR output is a 20 µs pulse followed by a 40 µs pulse, with a separation of 15 µs between the pulses.
- B. The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, with a separation of 40 µs between the pulses.
- C. The exclusive-OR output is a 15 µs pulse followed by a 40 µs pulse.
- D. *The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, followed by a 40 µs pulse. Discuss
- 5. When a computer is executing a program of instructions, the CPU will ________ memory locations as dictated by the program instructions.
Options- A. format
- B. scan
- C. store data into
- D. verify Discuss
- 6. Add the following BCD numbers.
0110 0111 1001 0101 1000 1000
Options- A. 0000 1011 0000 1111 0001 0001
- B. 0001 0001 0001 0101 0001 0001
- C. 0000 1011 0000 1111 0001 0111
- D. 0001 0001 0001 0101 0001 0111 Discuss
- 7. The problem of different current requirements when CMOS logic circuits are driving TTL logic circuits can usually be overcome by the addition of:
Options- A. a CMOS inverting bilateral switch between the stages
- B. a TTL tristate inverting buffer between the stages
- C. a CMOS noninverting bilateral switch between the stages
- D. a CMOS buffer or inverting buffer Discuss
- 8. The MOV, PUSH, and POP instructions are all part of which type of instruction?
Options- A. Data transfer
- B. Arithmetic
- C. Bit manipulation
- D. Loops and jumps Discuss
- 9. For the following conditions on a 7485 magnitude comparator, what will be the state of each of the three outputs?
A0 = 0 B0 = 1 IA < B = 0 A1 = 1 B1 = 0 IA = B = 1 A2 = 1 B2 = 0 IA > B = 0 A3 = 0 B3 = 0
Options- A. A = B = 0, A < B = 0, A > B = 1
- B. A = B = 0, A < B = 1, A > B = 0
- C. A = B = 1, A < B = 0, A > B = 0
- D. A = B = 0, A < B = 0, A > B = 0 Discuss
- 10. A test system using the GPIB is being used to monitor a potentially dangerous crash test from a distance of 200 feet. The engineer decides to have you fabricate a special cable, rather than order one, since all the materials are on hand and the tests are already behind schedule. When the tests are run, the test system is erratic and the data is almost useless. What has gone wrong?
Options- A. The engineer is probably not using the correct data format for the specific instruments being used to collect the data.
- B. The GPIB cable is too long; a bus extender should be used.
- C. The cable should be shielded and properly grounded.
- D. The tests themselves probably produced extraneous signals that confused the instruments, resulting in unusable data. Discuss
More questions
Correct Answer: When MR1 and MR2 are both HIGH, all Qs will be reset to zero.
Correct Answer: The digital system follows a programmed sequence of instructions that the designer specified.
Correct Answer: Boundary scan
Correct Answer: *The exclusive-OR output is a 20 µs pulse followed by a 15 µs pulse, followed by a 40 µs pulse.
Correct Answer: store data into
Correct Answer: 0001 0001 0001 0101 0001 0111
Correct Answer: a CMOS buffer or inverting buffer
Correct Answer: Data transfer
Correct Answer: A = B = 0, A < B = 0, A > B = 1
Correct Answer: The GPIB cable is too long; a bus extender should be used.
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