Which is not an Altera primitive port identifier? clk ena clr prn

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Question
Which is not an Altera primitive port identifier?
Options
A. clk
B. ena
C. clr
D. prn

Correct Answer

clr

Flip-Flops problems

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1. The toggle condition in a master-slave J-K flip-flop means that Q and will switch to their ________ state(s) at the ________.
Options
A. opposite, active clock edge
B. inverted, positive clock edge
C. quiescent, negative clock edge
D. reset, synchronous clock edge

4. A push-button switch is used to input data to a register. The output of the register is erratic. What could be causing the problem?
Options
A. The power supply is probably noisy.
B. The switch contacts are bouncing.
C. The socket contacts on the register IC are corroded.
D. The register IC is intermittent and failure is imminent.

6. What is the difference between a 7490 and a 7492?
Options
A. 7490 is a MOD-12, 7492 is a MOD-10
B. 7490 is a MOD-12, 7492 is a MOD-16
C. 7490 is a MOD-16, 7492 is a MOD-10
D. 7490 is a MOD-10, 7492 is a MOD-12

7. List the state of each output pin of a 7447 if RBI = 0, LT = 1, A₀ = 1, A₁ = 0, A₂ = 0, and A₃ = 1.
Options
A. RBO = 0, a = 0, b = 0, c = 0, d = 1, e = 1, f = 0, g = 0
B. RBO = 1, a = 0, b = 0, c = 0, d = 1, e = 1, f = 0, g = 0
C. RBO = 0, a = 0, b = 0, c = 0, d = 0, e = 1, f = 0, g = 0
D. RBO = 1, a = 0, b = 0, c = 0, d = 0, e = 1, f = 0, g = 0

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