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Digital Electronics
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Boolean Algebra and Logic Simplification
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Question
For the SOP expression
, how many 1s are in the truth table's output column?
Options
A. 1
B. 2
C. 3
D. 5
Correct Answer
3
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More questions
1. If both inputs of a 2-input NOR gate are connected, the gate will function as an ________.
Options
A. OR gate
B. AND gate
C. inverter
D. any of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: inverter
2. Temperature variation is normally an analog quantity.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
3. What is the resolution, in percent, of a 12-bit DAC?
Options
A. 8.33
B. 0.049
C. 0.000488
D. 0.083
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.049
4. This program code will be executed once:
STAT:
MOV A, #01H
JNZ STAT
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
5. Which of the following commands will copy the contents of location 4H to the accumulator?
Options
A. MOV A, 04H
B. MOV A, L4
C. MOV L4, A
D. MOV 04H, A
Show Answer
Scratch Pad
Discuss
Correct Answer: MOV A, 04H
6. The following program will cause the 8051 to be stuck in a loop:
LOOP:
MOV A, #00H
JNZ LOOP
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
7. MOV A, @ R1 will:
Options
A. copy R1 to the accumulator
B. copy the accumulator to R1
C. copy the contents of memory whose address is in R1 to the accumulator
D. copy the accumulator to the contents of memory whose address is in R1
Show Answer
Scratch Pad
Discuss
Correct Answer: copy the contents of memory whose address is in R1 to the accumulator
8. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
9. The contents of the accumulator after this operation
MOV A,#2BH
ORL A,00H
will be:
Options
A. 1B H
B. 2B H
C. 3B H
D. 4B H
Show Answer
Scratch Pad
Discuss
Correct Answer: 2B H
10. The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
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