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Updated weekly · Last refresh Nov 1

Top 50 databases Interview Questions

The most frequently asked databases questions across all roles and companies, ranked by real interview frequency. Updated daily.

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171companies covered

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SQL & Data ManipulationStart here. 28 questions · ~342 min

Understanding Database SchemaEasy

Practice

Recently asked

Use PostgreSQL metadata to list the structure and column details of a database table.

database managementdatabasedatabases

Peraton

CATERPILLAR

MongoDB vs SQL and What You KnowEasy

Practice

Recently asked

Compare SQL and MongoDB characteristics by joining topic metadata with database-specific values.

nosqldatabasesdatabase concepts

MongoDB

Relational vs Non-Relational DatabasesEasy

Practice

Produce a structured SQL comparison of relational and non-relational database characteristics.

nosqldatabasesdatabase concepts

AlgoliaEEtech

Database-Focused Technical QuestionsMedium

Practice

Recently asked

Summarize database interview responses by topic, including unanswered topics and null scores.

databasesdatabase queryingAggregations

Goldman Sachs Asset & Wealth Management

Snowflake Scheduled TaskMedium

Practice

Recently asked

Write a Snowflake query to create and schedule a task that runs every hour. Asked in the Technical round 1 stage. Since the target database is PostgreSQL,...

Date Functionsdatabase managementdatabases

Accenture

Hash Tables and ImplementationsEasy

Practice

Use joins and aggregation to list common hash table implementations and their documented features.

Data Manipulationdatabasesdatabase concepts

Lockheed Martin

Build a User Input Form for a Data SchemaEasy

Practice

Persist validated React form fields into related PostgreSQL user tables and return the saved record.

Data Manipulationdatabasesdata validation

Rippling

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Coding6 questions · ~73 min

Core Database and Async FundamentalsHard

Practice

Recently asked

Simulate asynchronous task completion using an ID index, dependency counts, and a min-heap.

Data StructuresasynchronousdatabasesEEPAM India

EPAM Systems

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Security & Infrastructure4 questions · ~49 min

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System Design5 questions · ~61 min

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Behavioral & Leadership3 questions · ~37 min

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