Digital Electronics-Combinational Logic Circuits

Digital Electronics-Combinational Logic Circuits
1. How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?
  • 1
  • 2
  • 4
  • 8
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2. Convert BCD 0001 0010 0110 to binary.
  • 1111110
  • 1111101
  • 1111000
  • 1111111
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3. Convert BCD 0001 0111 to binary.
  • 10101
  • 10010
  • 10001
  • 11000
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4. How many data select lines are required for selecting eight inputs?
  • 1
  • 2
  • 3
  • 4
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5. How many 1-of-16 decoders are required for decoding a 7-bit binary number?
  • 5
  • 6
  • 7
  • 8
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6. The implementation of simplified sum-of-products expressions may be easily implemented into actual logic circuits using all universal ________ gates with little or no increase in circuit complexity. (Select the response for the blank space that will BEST make the statement true.)
  • AND/OR
  • NAND
  • NOR
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7. Which of the following statements accurately represents the two BEST methods of logic circuit simplification?
  • Boolean algebra and Karnaugh mapping
  • Karnaugh mapping and circuit waveform analysis
  • Actual circuit trial and error evaluation and waveform analysis
  • Boolean algebra and actual circuit trial and error evaluation
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8. Which of the following combinations cannot be combined into K-map groups?
  • Corners in the same row
  • Corners in the same column
  • Diagonal corners
  • Overlapping combinations
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9. Which gate is best used as a basic comparator?
  • NOR
  • OR
  • Exclusive-OR
  • AND
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10. In VHDL, macrofunctions is/are:
  • digital circuits.
  • analog circuits.
  • a set of bit vectors.
  • preprogrammed TTL devices.
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Digital Electronics
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