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Java: What deeper point about Comparable vs Comparator should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Comparable vs Comparator should a senior Java developer mention?

  1. Good comparators are transitive, predictable, and explicit about null handling because ordering bugs spread quickly through collection behavior.
  2. At senior level, the right answer is that Comparable vs Comparator exists mostly for historical syntax reasons.
  3. At senior level, the JVM removes the tradeoffs around Comparable vs Comparator, so design choices barely matter.
  4. At senior level, any approach to Comparable vs Comparator 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: A. Good comparators are transitive, predictable, and explicit about null handling because ordering bugs spread quickly through collection behavior.

Good comparators are transitive, predictable, and explicit about null handling because ordering bugs spread quickly through collection behavior. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java