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Java: What deeper point about Dynamic Arrays and Resizing should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Dynamic Arrays and Resizing should a senior Java developer mention?

  1. At senior level, the right answer is that Dynamic Arrays and Resizing exists mostly for historical syntax reasons.
  2. At senior level, the JVM removes the tradeoffs around Dynamic Arrays and Resizing, so design choices barely matter.
  3. Interviewers expect amortized-analysis language here because growth cost is spread across many cheap appends rather than paid on every insert.
  4. At senior level, any approach to Dynamic Arrays and Resizing 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: C. Interviewers expect amortized-analysis language here because growth cost is spread across many cheap appends rather than paid on every insert.

Interviewers expect amortized-analysis language here because growth cost is spread across many cheap appends rather than paid on every insert. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java