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Prep plan
Updated weekly · Last refresh Aug 30

Oak Ridge National Laboratory Software Engineer Interview Questions

The questions to prepare for a Oak Ridge National Laboratory Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

47questions
~9htotal time
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1
CodingStart here. 14 questions · ~157 min
Merge Overlapping IntervalsEasy
Practice

Merge overlapping intervals in a list of intervals.

ArraysSearchingSortingOak Ridge National Laboratory
Reverse a Linked List In PlaceEasy
Practice

Reverse a singly linked list in place using pointer manipulation in O(n) time and O(1) space.

RecursionLinked ListspointersOak Ridge National Laboratory
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2
SQL & Data Manipulation3 questions + 1 drill · ~44 min
Monthly Active Users QueryEasy
Practice

Use a CTE, join, date truncation, and distinct user logic to calculate monthly active users in TransUnion CreditVision.

Date FunctionsGroup ByAggregationsOak Ridge National Laboratory
Top Paid Per DepartmentEasy
Practice

Find the top 3 highest-paid employees in each department using window functions.

Window FunctionsRankingOak Ridge National Laboratory
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
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3
System Design3 questions · ~34 min
Design Cold Start RecommendationsHard

Design a recommendation system strategy for new users and new items when interaction history is sparse or missing.

Cold StartFeature StoreRecommendation SystemsOak Ridge National Laboratory
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4
Execution3 questions · ~34 min
Refactor vs Rebuild DecisionMedium

Assesses your ability to evaluate technical debt, risk, and cost when evolving software.

refactoringOak Ridge National Laboratory
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5
Behavioral & Leadership21 questions · ~235 min
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6
More topics3 questions · ~34 min
Backfilling Missing Pipeline DataMedium

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQualityOak Ridge National Laboratory
Explain Circuit Drawings Under ConditionsMedium

Evaluates your ability to interpret circuit behavior and explain it clearly.

Oak Ridge National Laboratory
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The finish line: interview-readyComplete all 47 questions plus 1 hands-on drill to finish this plan.