How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a easy difficulty Coding & Algorithms question, commonly asked during Onsite rounds at Google.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Google during technical interviews.

Find Common Free Time Slots Across Calendars

Last updated: Jul 1, 2026

Quick Overview

This question evaluates a candidate's ability to work with interval merging and sweep-line techniques over multiple overlapping schedules. It tests practical coding skill in handling edge cases like half-open intervals, boundary touching, and multi-way set intersection, a common pattern in coding and algorithms interviews. The question requires applying array and interval-processing concepts at an implementation level rather than purely conceptual understanding.