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Describing Logic Circuits problems

1. The special software application that translates from HDL into a grid of 1's and 0's, which can be loaded into a PLD, is called a:
Options
A. formatter.
B. compiler.
C. programmable wiring.
D. CPU.

Correct Answer: compiler.

2. In VHDL, the mode of a port does not define:
Options
A. an input.
B. an output.
C. both an input and an output.
D. the TYPE of the bit.

Correct Answer: the TYPE of the bit.

3. For a three-input NOR gate, with the input waveforms as shown below, which output waveform is correct?
Options
A. a
B. b
C. c
D. d

Correct Answer: a

4. An OR gate with inverted inputs functions as:
Options
A. an AND gate.
B. a NAND gate.
C. a NOR gate.
D. an inverter.

Correct Answer: a NAND gate.

5. Which of the examples below expresses the associative law of addition:
Options
A. A + (B + C) = (A + B) + C
B. A + (B + C) = A + (BC)
C. A(BC) = (AB) + C
D. ABC = A + B + C

Correct Answer: A + (B + C) = (A + B) + C

6. Which of the following is a form of DeMorgan's theorem?
Options
A.
B.
C.
D.

Correct Answer:

7. Which of the symbols shown below represents an AND gate?
Options
A. a
B. b
C. c
D. d

Also asked in:

Correct Answer: d

8. Which of the figures (a to d) is the DeMorgan equivalent of Figure (e)?
Options
A. a
B. b
C. c
D. d

Also asked in:

Correct Answer: a

9. The logic gate that will have HIGH or "1" at its output when any one of its inputs is HIGH is a(n):
Options
A. NOR gate
B. OR gate
C. AND gate
D. NOT operation

Correct Answer: OR gate

10. For a three-input AND gate, with the input waveforms as shown below, which output waveform is correct?
Options
A. a
B. b
C. c
D. d

Also asked in:

Correct Answer: c

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More in Digital Electronics:

Boolean Algebra and Logic Simplification Code Converters and Multiplexers Combinational Logic Analysis Combinational Logic Circuits Computers Counters Describing Logic Circuits Digital Arithmetic Operations and Circuits Digital Concepts Digital Design Digital Signal Processing Digital System Projects Using HDL Ex-OR and Ex-NOR Gates Flip-Flops Integrated-Circuit Logic Families Integrated Circuit Technologies Interfacing to the Analog World Logic Families and Their Characteristics Logic Gates Memory and Storage Microprocessor Fundamentals MSI Logic Circuits Multivibrators and 555 Timer Number Systems and Codes Programmable Logic Device Shift Registers Signals and Switches The 8051 Microcontroller

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