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Java: Which practice avoids a common mistake with Circular Queue and Ring Buffer?

Difficulty:

Medium

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which practice avoids a common mistake with Circular Queue and Ring Buffer?

  1. Ignore the Circular Queue and Ring Buffer issue and rely on team discipline instead of APIs or contracts.
  2. Do not let head and tail equality mean both empty and full without an extra size or reserved-slot rule.
  3. Silence the Circular Queue and Ring Buffer problem by using raw types, broad catches, or shared mutable state.
  4. Prefer the version of Circular Queue and Ring Buffer that makes behavior less predictable as long as the code compiles.

Hint

Look for the option that protects correctness instead of hiding the problem.

Answer and rationale

Correct answer: B. Do not let head and tail equality mean both empty and full without an extra size or reserved-slot rule.

Do not let head and tail equality mean both empty and full without an extra size or reserved-slot rule. This is a common failure mode in real Java code and a frequent interview follow-up.

Track: Java