Which of the following statement is CORRECT regarding FLIP-FLOPS? I. A…
2023
Which of the following statement is CORRECT regarding FLIP-FLOPS?
I. A FLIP-FLOP circuit can maintain a binary state indefinitely (as long as power is applied) until directed by an input signal to switch states. II. The major differences among various types of FLIP-FLOPS are in the number of inputs they possess and in the manner in which the inputs affect the binary state.
- A.
Only II
- B.
Neither I nor II
- C.
Only I
- D.
Both I and II
Attempted by 227 students.
Show answer & explanation
Correct answer: D
Concept
A flip-flop is a bistable sequential element: it has exactly two stable output states (0 and 1) and, once driven into one of them, it holds that state indefinitely while power is supplied — it only changes when a triggering input (or clock edge) commands a change. This memory behaviour is what distinguishes sequential logic from combinational logic.
The common flip-flop types differ purely in their input interface — how many control inputs they expose and how those inputs map onto the next state:
SR — separate Set and Reset inputs (set / reset / hold).
D — a single Data input that is stored on each clock edge.
JK — Set, Reset and an added toggle case for the J=K=1 input.
T — a single Toggle input that flips the stored state.
Applying it to each statement
Statement I describes the bistable/memory property: a flip-flop holds a binary state indefinitely while powered, until an input directs a switch. That is the defining property of the device, so this description matches a flip-flop.
Statement II describes how the types differ — by the number of inputs and the way those inputs drive the next state. The SR/D/JK/T list above is classified on exactly that basis, so this description also matches a flip-flop.
Cross-check
The two statements restate independent standard properties (memory/bistability, and input-defined type differences) and neither contradicts the other, so both fit the definition. The answer is Both I and II.