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Warner Bros. Discovery Software Engineer Interview Questions

The questions to prepare for a Warner Bros. Discovery Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~8htotal time
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1
CodingStart here. 20 questions · ~197 min
Search in Rotated Sorted ArrayEasy
Practice
Recently asked

Find a target in a rotated sorted array using modified binary search in O(log n) time.

RecursionArraysSearchingWarner Bros. Discovery
Design an LRU CacheEasy
Practice
Recently asked

Implement an LRU cache in O(1) average time using a hash table and doubly linked list.

Hash TablesQueueLinked ListsWarner Bros. Discovery
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2
Execution6 questions · ~59 min
Scalable URL ShortenerHard
Recently asked

Tests data modeling, caching strategy, and performance under mixed read-write load.

Trade-offsperformancecachingWarner Bros. Discovery
Global Real-Time ChatHard
Recently asked

Tests distributed systems thinking for concurrency, delivery guarantees, and storage.

Technical FluencythroughputCloudWarner Bros. Discovery
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3
System Design13 questions · ~128 min
Recommendation Engine for OTTHard
Recently asked

Tests system design trade-offs for low-latency personalization at scale.

RetrievalModel ServingRecommendation SystemsWarner Bros. Discovery
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4
Security & Infrastructure4 questions · ~39 min
Implement a GPOMedium

Assesses practical security and infrastructure knowledge for enterprise policy management.

Warner Bros. Discovery
Traceroute in Cisco CMLMedium

Evaluates understanding of network diagnostics in a lab or emulated environment.

NetworkingWarner Bros. Discovery
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5
Behavioral & Leadership6 questions · ~59 min
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6
More topics1 question · ~10 min
Relational Schema for Video CommentsMedium
Recently asked

Tests schema design, indexing strategy, and query efficiency for user-centric access.

star schemaJoinsData ModelingWarner Bros. Discovery

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Analyzing Operations Bottlenecks with SQLHard
Practice
Practice drill

Use multi-level CTEs, joins, and LAG to identify Samsung regional inventory shortages and late deliveries.

JoinsperformanceAggregationsSamsung ElectronicsApeel Sciences
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.