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Java: What deeper point about Lambdas and Functional Interfaces should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Lambdas and Functional Interfaces should a senior Java developer mention?

  1. At senior level, the right answer is that Lambdas and Functional Interfaces exists mostly for historical syntax reasons.
  2. At senior level, the JVM removes the tradeoffs around Lambdas and Functional Interfaces, so design choices barely matter.
  3. At senior level, any approach to Lambdas and Functional Interfaces is equally correct if it compiles and passes a small test.
  4. Lambdas work best when the surrounding types already communicate intent clearly, so brevity does not come at the cost of readability.

Hint

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

Answer and rationale

Correct answer: D. Lambdas work best when the surrounding types already communicate intent clearly, so brevity does not come at the cost of readability.

Lambdas work best when the surrounding types already communicate intent clearly, so brevity does not come at the cost of readability. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java