Difficulty: Easy
Correct Answer: flip flop
Explanation:
Introduction / Context:At the heart of sequential logic is a circuit that can store one bit of information reliably. Understanding which component provides this function is critical for designing registers, state machines, and memory structures.
Given Data / Assumptions:
Concept / Approach:A flip-flop (e.g., SR, JK, D, T) is a bistable sequential element with two stable states, capable of latching a single bit. Other components like multiplexers, encoders, and decoders process data but do not inherently store state without additional feedback.
Step-by-Step Solution:
Flip-flop provides two stable states (logic 0 and 1) with clocked or level-sensitive control.Counters are cascaded flip-flops; they store multiple bits, but the fundamental element inside is still a flip-flop.Multiplexers, encoders, decoders are combinational and do not store state.Verification / Alternative check:Check any register design: it is a bank of D flip-flops, each storing one bit and controlled by a clock and enable/reset as needed.
Why Other Options Are Wrong:
Counter: stores multiple bits but is built from flip-flops; not the atomic storage element.Multiplexer/encoder/decoder: routing/encoding functions only.Common Pitfalls:
Confusing a multi-bit structure (counter) with the base single-bit storage element (flip-flop).Final Answer:
flip flop
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