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DSA · Lesson 4 · Code analysis

A flash sale drops stock by one. Which command keeps the decrement atomic?

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Aarav 2h

Why does DECR count as atomic but GET then SET does not?

DSA Lesson 4

Mira 1h

GET then SET is two separate steps, so another client can write in between and its value is lost. DECR is a single read-modify-write, so nothing can interleave.

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Continue where you left off Stacks and queues Lesson 4 of 12 · DSA · 7 questions left
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Continue Stacks and queues Lesson 4 of 12

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