Skip to content

Tracks

AI-assisted engineering Working with AI Agents System design Core systems Data and AI systems Coding Coding problems Code review On-call SQL

Practice

Paths Concept guides

FreeAd-supported

The plan adds AI feedback and removes ads.

Concept guides/Searching and sorting/Sorting algorithms

CodingSearching and sorting

Sorting algorithms

Easy3 min read

Questions it teaches

Symmetric differenceEasy11 min Return the k highest server loadsEasy10 min K shortest waitsEasy10 min Sum of k largestEasy10 min K-th largest elementEasy12 min K-th lowest distinct levelEasy12 min Merge sorted rostersEasy12 min Canonical coin changeEasy10 min

Related

Searching and sorting Arrays and strings Graphs and trees Performance review Designing data structures

Builds on: Arrays and strings

Arrays & in-place tricks3 min Hash maps & sets3 min

Leads to: Graphs and trees

Graph traversal (BFS & DFS)3 min Critical path scheduling4 min

Leads to: Performance review

Performance bugs3 min SQL query performance4 min

Related: Designing data structures

Queues, deques & ring buffers3 min Database deduplication3 min

© 2026 Prep Room·From California·AI can make mistakes.

About Legal Contact Cookies Your privacy choices

Home Review Tracks Paths