Answer two coding questions (SQL and DP)

Q: How do I practice coding and algorithm questions?

Use PracHub's coding console to write, test, and debug your solutions in Python or JavaScript. View hints, test against sample inputs, and compare with official solutions.

Q: What difficulty level is this coding question?

This is a medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Amazon.

Q: What role is this question designed for?

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

Question

Answer two coding questions (SQL and DP)

PracHub · Accepted Answer

This multi-part question evaluates SQL query skills (handling distinct values, aggregation and edge-case NULL results) and algorithmic proficiency in dynamic programming on strings, specifically counting distinct palindromic subsequences under modular arithmetic.

Quick Overview

Answer two coding questions (SQL and DP)