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Digital Electronics
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Digital Arithmetic Operations and Circuits
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Question
What are the two types of basic adder circuits?
Options
A. sum and carry
B. half-adder and full-adder
C. asynchronous and synchronous
D. one- and two's-complement
Correct Answer
half-adder and full-adder
More questions
1. In a real project, the first step of definition often involves some ________ on the part of the project manager.
Options
A. time
B. skill
C. research
D. management
Show Answer
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Discuss
Correct Answer: research
2. The control and arithmetic/logic units are often considered as one unit called the ________.
Options
A. central processing unit
B. inputs and outputs
C. microcomputer
D. arithmetic/logic unit
Show Answer
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Discuss
Correct Answer: central processing unit
3. The basic comparator evaluates two binary strings bit by bit and always outputs a 1.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
4. The proliferation of small handheld consumer equipment such as digital video cameras, cellular phones, handheld computers (________), portable audio systems, and other devices has created a need for logic circuits in very small packages.
Options
A. HDLs
B. GDAs
C. PDAs
D. TTLs
Show Answer
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Discuss
Correct Answer: PDAs
5. The given circuit is a(n) ________.
Options
A. three-bit synchronous binary counter
B. eight-bit asynchronous binary flip-flop
C. two-bit asynchronous binary counter
D. four-bit asynchronous binary counter
Show Answer
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Discuss
Correct Answer: four-bit asynchronous binary counter
6. The process of designing a synchronous counter that will count in a nonbinary manner is primarily based on:
Options
A. external logic circuits that decode the various states of the counter to apply the correct logic levels to the
J-K
inputs
B. modifying BCD counters to change states on every second input clock pulse
C. modifying asynchronous counters to change states on every second input clock pulse
D. elimination of the counter stages and the addition of combinational logic circuits to produce the desired counts
Show Answer
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Discuss
Correct Answer: external logic circuits that decode the various states of the counter to apply the correct logic levels to the
J-K
inputs
7. Which of the following is not a basic Boolean operation?
Options
A. OR
B. NOT
C. AND
D. FOR
Show Answer
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Discuss
Correct Answer: FOR
8. The two's complement of 00001111 is ________.
Options
A. 11111111
B. 11110000
C. 11110001
D. 11110111
Show Answer
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Discuss
Correct Answer: 11110001
9. A type of memory that is accessed serially (one location after the other) is a ________.
Options
A. ROM
B. read/write memory
C. shift register
D. PLD
Show Answer
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Discuss
Correct Answer: shift register
10. Dynamic RAMs store information by using ________.
Options
A. magnetism
B. flip-flops
C. latches
D. capacitors
Show Answer
Scratch Pad
Discuss
Correct Answer: capacitors
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