Digital System Projects Using HDL Questions and Answers

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Showing 10 of 58 questions
Q1
In a frequency counter, what happens at high frequencies when the sampling interval is too long?
  • A The counter works fine.
  • B The counter undercounts the frequency.
  • C The measurement is less precise.
  • D The counter overflows.
Answer: Option D
Q2
In the digital clock project, when does the PM indicator go high?
  • A Never
  • B Going from 11:59:59 to 12:00:00
  • C Going from 12:59:59 to 01:00:00
  • D On the falling edge of the clock after enable goes high
Answer: Option B
Q3
How is the output frequency related to the sampling interval of a frequency counter?
  • A Directly with the sampling interval
  • B Inversely with the sampling interval
  • C More precision with longer sampling interval
  • D Less precision with longer sampling interval
Answer: Option C
Q4
In an HDL application of a stepper motor, after an up/down counter is built what is done next?
  • A Build the sequencer
  • B Test it on a simulator
  • C Test the decoder
  • D Design an intermediate integer variable
Answer: Option B
Q5
In a digital clock application, the basic frequency must be divided down to:
  • A 1 Hz.
  • B 60 Hz.
  • C 100 Hz.
  • D 1000 Hz.
Answer: Option A
Q6
In the keypad application, what does the data signal define?
  • A The row and column encoded data
  • B The ring encoded data
  • C The freeze locator data
  • D The ring counter data
Answer: Option A
Q7
What does the ring counter in the HDL keypad application do when a key is pressed?
  • A Count to find the row
  • B Freeze
  • C Count to find the column
  • D Start the D flip-flop
Answer: Option B
Q8
In the digital clock project, the purpose of the frequency prescaler is to:
  • A find the basic frequency.
  • B transform a 60 pps input to a 1 pps timing signal.
  • C prevent the clock from exceeding 12:59:59.
  • D allow the BCD display to have a value from 00–59.
Answer: Option B
Q9
Which is not a step that should be followed in project management?
  • A Overall definition
  • B System documentation
  • C Synthesis and testing
  • D System integration
Answer: Option B
Q10
In the keypad application, what does the preset state of the ring counter define?
  • A The proper output of the column encoder
  • B The NANDing of the rows
  • C The NANDing of the columns
  • D The proper output of the row encoder
Answer: Option C

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