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Java: Which practice avoids a common mistake with Binary Tree Traversals?

Difficulty:

Medium

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which practice avoids a common mistake with Binary Tree Traversals?

  1. Do not memorize traversal names without understanding what work happens before, between, or after recursive child visits.
  2. Ignore the Binary Tree Traversals issue and rely on team discipline instead of APIs or contracts.
  3. Silence the Binary Tree Traversals problem by using raw types, broad catches, or shared mutable state.
  4. Prefer the version of Binary Tree Traversals that makes behavior less predictable as long as the code compiles.

Hint

Look for the option that protects correctness instead of hiding the problem.

Answer and rationale

Correct answer: A. Do not memorize traversal names without understanding what work happens before, between, or after recursive child visits.

Do not memorize traversal names without understanding what work happens before, between, or after recursive child visits. This is a common failure mode in real Java code and a frequent interview follow-up.

Track: Java