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Java: What deeper point about Java Memory Model, volatile, and synchronized should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Java Memory Model, volatile, and synchronized should a senior Java developer mention?

  1. At senior level, the right answer is that Java Memory Model, volatile, and synchronized exists mostly for historical syntax reasons.
  2. Most concurrency bugs come from broken visibility and violated invariants, not just from forgetting one lock keyword.
  3. At senior level, the JVM removes the tradeoffs around Java Memory Model, volatile, and synchronized, so design choices barely matter.
  4. At senior level, any approach to Java Memory Model, volatile, and synchronized is equally correct if it compiles and passes a small test.

Hint

Look beyond syntax and explain the runtime, API, or design consequence.

Answer and rationale

Correct answer: B. Most concurrency bugs come from broken visibility and violated invariants, not just from forgetting one lock keyword.

Most concurrency bugs come from broken visibility and violated invariants, not just from forgetting one lock keyword. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java