Flip-Flops and Timers - General Questions Online Exam Quiz

Flip-Flops and Timers - General Questions GK Quiz. Question and Answers related to Flip-Flops and Timers - General Questions. MCQ (Multiple Choice Questions with answers about Flip-Flops and Timers - General Questions

Which of the following is correct for a gated D-type flip-flop?


A : The Q output is either SET or RESET as soon as the D input goes HIGH or LOW.

B : The output complement follows the input when enabled.

C : Only one of the inputs can be HIGH at a time.

D : The output toggles if one of the inputs is held HIGH.

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When both inputs of a J-K flip-flop cycle, the output will:


A : be invalid

B : not change

C : change

D : toggle

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Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?


A : asynchronous operation

B : low input voltages

C : gate impedance

D : cross coupling

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The 555 timer can be used in which of the following configurations?


A : astable, monostable

B : monostable, bistable

C : astable, toggled

D : bistable, tristable

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A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?


A : AND or OR gates

B : XOR or XNOR gates

C : NOR or NAND gates

D : AND or NOR gates

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One example of the use of an S-R flip-flop is as a(n):


A : transition pulse generator

B : astable oscillator

C : racer

D : switch debouncer

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If both inputs of an S-R NAND latch are LOW, what will happen to the output?


A : The output would become unpredictable.

B : The output will toggle.

C : The output will reset.

D : No change will occur in the output.

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The equation for the output frequency of a 555 timer operating in the astable mode is: . What value of C 1 will be required if R 1 = 1 k , R 2 = 1 k , and f = 1 kHz?


A : 0.33 F

B : 0.48 F

C : 480 F

D : 33 nF

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An astable multivibrator is a circuit that:


A : has two stable states

B : is free-running

C : produces a continuous output signal

D : is free-running and produces a continuous output signal

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What is another name for a one-shot?


A : monostable

B : bistable

C : astable

D : tristable

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