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Java: What deeper point about Two-Dimensional Arrays should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Two-Dimensional Arrays should a senior Java developer mention?

  1. At senior level, the right answer is that Two-Dimensional Arrays exists mostly for historical syntax reasons.
  2. A strong answer notes that Java's array-of-arrays model affects bounds checks, traversal safety, and how memory is actually laid out.
  3. At senior level, the JVM removes the tradeoffs around Two-Dimensional Arrays, so design choices barely matter.
  4. At senior level, any approach to Two-Dimensional Arrays 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. A strong answer notes that Java's array-of-arrays model affects bounds checks, traversal safety, and how memory is actually laid out.

A strong answer notes that Java's array-of-arrays model affects bounds checks, traversal safety, and how memory is actually laid out. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java