Quick Overview

Build reusable column indexes for an immutable numeric table, then answer range-filter queries that combine conditions with logical AND. The task tests binary-search boundaries, candidate intersection, duplicate row identity, deterministic output ordering, and honest preprocessing and query costs.

Query an Indexed In-Memory Numeric Table

Company: Retell AI

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: Build reusable column indexes for an immutable numeric table, then answer range-filter queries that combine conditions with logical AND. The task tests binary-search boundaries, candidate intersection, duplicate row identity, deterministic output ordering, and honest preprocessing and query costs.

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