oracle
20 interview questions available
Count closed islands in a grid
easy
Feb 18, 2026
Implement in-memory data structures and booking API
hard
Feb 12, 2026
Extend and optimize an existing CLI tool
medium
Feb 12, 2026
Apply operations efficiently using Command pattern
medium
Feb 12, 2026
How do you tackle unfamiliar problems?
medium
Jan 4, 2026
Maximize area between vertical lines
medium
Jan 4, 2026
Count anagram-based replacements per phrase
medium
Dec 15, 2025
Find users with at least one valid session
medium
Nov 11, 2025
Implement an LRU cache
medium
Nov 6, 2025
Design structure for first unique login user
easy
Oct 12, 2025