Flip-Flops & Counters MCQ Practice

What is the main function of a flip-flop?

• Counting pulses

• Storing a single bit of data

• Amplifying signals

• Converting analog to digital

Which flip-flop has a "prohibited state"?

• D Flip-Flop

• JK Flip-Flop

• RS Flip-Flop

• T Flip-Flop

What are the two outputs of a flip-flop?

• Q and T

• Q and R

• Q and Q̅ (not Q)

• R and S

Which type of flip-flop eliminates the invalid state problem in RS flip-flops?

• SR Latch

• JK Flip-Flop

• D Flip-Flop

• T Flip-Flop

The D in D Flip-Flop stands for:

• Direct

• Delay/Data

• Device

• Digital

In a D Flip-Flop, if D = 1 and a rising clock edge occurs, what is Q?

• 0

• 1

• No change

• Toggle

What does "edge-triggered" mean in flip-flops?

• Responds to input only

• Responds continuously

• Responds only during a clock transition

• No response to the clock

What is the output of a JK Flip-Flop when J = K = 1 on a rising clock edge?

• Reset

• Set

• No change

• Toggle

What is the output state when RS = 00 in a NAND RS Flip-Flop?

• Reset

• Set

• No change

• Invalid/Prohibited

What is a major advantage of clocked flip-flops over unclocked ones?

• Cheaper

• Smaller

• More stable and synchronized output

• Can be used without power