Validate parentheses and find k-th largest
Company: Meta
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: medium
Interview Round: Technical Screen
Quick Answer: This pair of problems evaluates mastery of fundamental data structures and algorithmic techniques: Problem A tests understanding of stack-based parsing and bracket-matching invariants for validating nested delimiters, while Problem B assesses proficiency with selection algorithms and heap-based priority queues for finding the k-th largest element.