Validate Nested Bracket Sequences Coding / DSA Interview

1. Problem Statement

2. Live Coding Format

3. Key Focus Areas

• 1
  Problem clarification and contract
• 2
  Approach exploration and optimality
• 3
  Think-aloud communication and pacing
• 4
  Implementation correctness
• 5
  Code quality and language fluency
• 6
  Handwritten tests and dry run
• 7
  Debugging and self-correction
• 8
  Complexity analysis
• 9
  Follow-up performance

4. What Strong Candidates Should Demonstrate

• ✓Clarify which characters count as brackets and how non-bracket characters are handled before coding.
• ✓Explain a naive repeated-removal baseline and improve to a single-pass stack solution.
• ✓Think aloud while implementing readable, correct matching logic.
• ✓Validate with explicit expected outputs and a top-to-bottom handwritten dry run.
• ✓Analyze time and space complexity and pace the easy core problem to leave room for a coding follow-up.