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Java: What deeper point about Doubly Linked Lists should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Doubly Linked Lists should a senior Java developer mention?

  1. At senior level, the right answer is that Doubly Linked Lists exists mostly for historical syntax reasons.
  2. At senior level, the JVM removes the tradeoffs around Doubly Linked Lists, so design choices barely matter.
  3. At senior level, any approach to Doubly Linked Lists is equally correct if it compiles and passes a small test.
  4. The strong interview answer is that doubly linked lists buy constant-time node splicing only if you already hold the node reference.

Hint

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

Answer and rationale

Correct answer: D. The strong interview answer is that doubly linked lists buy constant-time node splicing only if you already hold the node reference.

The strong interview answer is that doubly linked lists buy constant-time node splicing only if you already hold the node reference. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java