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Java: Which statement about HashMap Internals is the strongest interview answer?

Difficulty:

Easy

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which statement about HashMap Internals is the strongest interview answer?

  1. HashMap Internals is mostly a naming style choice and has little effect on runtime or design.
  2. HashMap Internals exists mainly to reduce the number of Java files in a project.
  3. HashMap uses a key's hash code to find a bucket and then uses equality checks to confirm the right entry.
  4. HashMap Internals matters only for frontend frameworks, not for core Java applications.

Hint

Start with the core rule behind HashMap Internals.

Answer and rationale

Correct answer: C. HashMap uses a key's hash code to find a bucket and then uses equality checks to confirm the right entry.

HashMap uses a key's hash code to find a bucket and then uses equality checks to confirm the right entry. This is the base concept interviewers commonly test first.

Track: Java