Cosmos DB Interview Questions for Freshers
Preparing for your first Cosmos DB interviews? This set is curated for freshers and early-career developers (0–2 years): the 27 questions that come up most for entry-level roles, each with a clear answer, example code and follow-ups.
27 Cosmos DB questions
- 1What is the Analytical Store and Azure Synapse Link?Intermediate
- 2How do you handle Throttling (HTTP 429) in an application?Intermediate
- 3What is a Resource Token and when should you use it?Intermediate
- 4Explain the Cosmos DB SDK Connection Modes: Gateway vs Direct.Intermediate
- 5What are Stored Procedures in Cosmos DB and how do they differ from SQL Server?Intermediate
- 6How does Multi-Region replication work in Cosmos DB?Intermediate
- 7Explain Indexing Policies and how to exclude paths.Intermediate
- 8What is the difference between Point Reads and SQL Queries?Intermediate
- 9How do you choose an effective Partition Key for a read-heavy workload?Intermediate
- 10Explain the five Consistency Levels in Azure Cosmos DB.Intermediate
- 11What is the difference between a Container and a Database in Cosmos DB?Beginner
- 12What is the Azure Cosmos DB Change Feed?Beginner
- 13What is Time to Live (TTL) in Cosmos DB?Beginner
- 14Explain the role of Throughput (Provisioned vs Autoscale).Beginner
- 15What is the 'id' property in Cosmos DB and how is it used?Beginner
- 16What is the difference between Logical and Physical partitions?Beginner
- 17What is a Partition Key and why is it mandatory?Beginner
- 18What are the different APIs supported by Azure Cosmos DB?Beginner
- 19Explain Request Units (RUs) in Cosmos DB.Beginner
- 20What is Azure Cosmos DB and what are its key features?Beginner
- 21What is a Partition Key in Cosmos DB?Beginner
- 22What is Azure Cosmos DB?Beginner
- 23What is indexing in Cosmos DB and why is it important?Intermediate
- 24What is Request Unit (RU) in Cosmos DB?Intermediate
- 25Cosmos DB Advanced Interview Question 10Beginner
- 26Cosmos DB Advanced Interview Question 8Intermediate
- 27Cosmos DB Advanced Interview Question 7Beginner
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Frequently asked questions
Which Cosmos DB questions do freshers (0–2 years) get asked?
This page collects 27 Cosmos DB interview questions aligned with freshers (0–2 years), ranging across the difficulty levels that match that experience band.
How do I prepare for a Cosmos DB interview with my experience level?
Work through these questions in order, make sure you can explain each answer out loud, and pay attention to the real-world examples and follow-ups — interviewers at this level care as much about reasoning as the final answer.
Do the answers include code and examples?
Yes — answers include explanations, code examples where relevant, common mistakes to avoid and follow-up questions so you are ready for the full interview conversation.