S–R flip-flop — typical application Which of the following is a representative and practical use of an S–R (Set–Reset) flip-flop in digital electronics?

Introduction / Context:
The S–R flip-flop is the simplest form of a bistable memory element built from cross-coupled gates. It stores one bit of information until inputs command a change. Knowing where an S–R flip-flop fits among common digital building blocks helps in recognizing appropriate use cases and in avoiding misuse where edge-triggered devices are required.

Given Data / Assumptions:

• S–R flip-flop can hold a logic 0 or logic 1 stably.
• Inputs S and R control set and reset actions (active-HIGH in NOR version, active-LOW in NAND version).
• No clocking is required in the basic latch configuration.

Concept / Approach:
Because the S–R flip-flop maintains a stable state until commanded otherwise, it naturally serves as a 1-bit storage cell. By combining several S–R (or derived) flip-flops, designers form registers that store multi-bit values. Oscillators and pulse generators require specific feedback timing and are not direct applications of a stand-alone S–R latch.

Step-by-Step Solution:

Verification / Alternative check:
Look at register files and state machines where set/reset actions initialize or store state; the S–R mechanism underlies many synchronous elements when properly gated or clocked.

Why Other Options Are Wrong:

• Racer: not a standard digital component; likely refers to race conditions, which are undesirable.
• Astable oscillator: requires timing networks and feedback not provided by a bare S–R latch.
• Transition pulse generator: typically uses differentiators/monostables, not a static S–R latch alone.

Common Pitfalls:
Using an S–R latch where a clocked D or JK flip-flop is required, leading to asynchronous hazards and metastability.

Final Answer:
binary storage register