Glean Coding Interview Questions
25 Glean coding interview problems with full optimal solutions — 8 easy, 12 medium, 5 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Glean interviewer values, and a FAQ section.
Showing 3 problems of 25
- #1easyvery frequently asked
1. Two Sum
Glean uses this as a warm-up to test whether candidates think in hash maps first — the same O(1) lookup pattern that powers their inverted-index search engine at the core.
- #70easysometimes asked
70. Climbing Stairs
Glean uses this to probe dynamic programming intuition — recognizing that the answer is just Fibonacci reveals whether a candidate spots optimal substructure without prompting, a skill that translates directly to ranking-function design.
- #217easysometimes asked
217. Contains Duplicate
Glean uses this as a fast filter to test whether candidates reach for a set before a nested loop — the exact reasoning behind deduplication in search indexing pipelines.