19 December 2025

#Azure_Cosmos_DB

#Azure_Cosmos_DB

Key Concepts


S.No Topic Sub-Topics
1 Introduction to Azure Cosmos DB What is Cosmos DB?, Features, Advantages, Global distribution, Use cases
2 Cosmos DB Architecture Database account, Containers, Partitioning, Replication, Consistency models
3 Cosmos DB APIs SQL API, MongoDB API, Cassandra API, Gremlin API, Table API
4 Setting Up Cosmos DB Creating account, Configuring database, Creating containers, Keys and connection strings, Portal overview
5 Data Modeling Document structure, JSON schema, Container design, Partition key selection, Best practices
6 CRUD Operations Create item, Read item, Update item, Delete item, Bulk operations
7 Querying Data SQL queries, Parameterized queries, Filtering, Sorting, Pagination
8 Partitioning Logical partitions, Physical partitions, Partition key design, Performance impact, Repartitioning
9 Indexing Automatic indexing, Custom indexing policies, Composite indexes, Spatial indexes, Indexing best practices
10 Consistency Models Strong, Bounded staleness, Session, Consistent prefix, Eventual consistency
11 Throughput & Request Units Provisioned throughput, Autoscale, RU calculation, Scaling, Monitoring RU consumption
12 Change Feed Overview, Enabling change feed, Event processing, Azure Functions integration, Use cases
13 Cosmos DB SDKs .NET SDK, Java SDK, Python SDK, Node.js SDK, CRUD operations
14 Transactional Batch Batch operations, ACID transactions, Atomicity, Limitations, Use cases
15 Stored Procedures Creating stored procedures, JavaScript support, Parameters, Error handling, Execution
16 Triggers Pre-triggers, Post-triggers, JavaScript triggers, Execution order, Use cases
17 User Defined Functions (UDFs) Creating UDFs, JavaScript functions, Query integration, Return types, Use cases
18 Security & Authentication Access keys, Role-based access control, Managed identities, IP firewalls, Encryption
19 Backup & Restore Automatic backups, Point-in-time restore, Geo-backup, Recovery options, Best practices
20 Monitoring & Metrics Azure Monitor, Metrics, Logs, Alerts, Performance tracking
21 Scaling & Performance Horizontal scaling, Vertical scaling, Partitioning impact, Throughput tuning, Latency optimization
22 Multi-region Distribution Global distribution, Read regions, Write regions, Failover policies, Replication latency
23 Cosmos DB Emulator Installation, Local development, API support, Testing, Limitations
24 Data Migration Azure Data Factory, BCP tool, Migration from MongoDB, CSV/JSON import, Bulk import
25 Integration with Azure Services Azure Functions, Logic Apps, Event Grid, Synapse Analytics, Stream Analytics
26 Cosmos DB & Microservices Event sourcing, CQRS pattern, Cache integration, Messaging, Real-time processing
27 Cost Management Estimating RUs, Autoscale costs, Reserved capacity, Cost monitoring, Optimization
28 Troubleshooting Common errors, Connectivity issues, Query performance, Partition issues, Logging
29 Best Practices Partition key selection, Indexing strategy, Throughput optimization, Global distribution, Security practices
30 Projects & Labs CRUD project, Change feed project, Global distribution lab, Cosmos DB + Functions, Performance testing lab

Interview question

📘 Basic Level

  1. What is Azure Cosmos DB?
  2. What are the key features of Cosmos DB?
  3. What is a multi-model database?
  4. How is Cosmos DB different from traditional SQL databases?
  5. What are the supported APIs in Cosmos DB?
  6. What is a database account in Cosmos DB?
  7. What is a container in Cosmos DB?
  8. What is an item/document in Cosmos DB?
  9. What is a partition key?
  10. What is logical partition vs physical partition?
  11. What is Request Unit (RU)?
  12. What are the consistency levels supported in Cosmos DB?
  13. What is strong consistency?
  14. What is eventual consistency?
  15. What is session consistency?
  16. What is bounded staleness consistency?
  17. What is consistent prefix consistency?
  18. How do you create a database in Cosmos DB?
  19. How do you create a container in Cosmos DB?
  20. What are Cosmos DB throughput models?
  21. What is serverless mode in Cosmos DB?
  22. What is provisioned throughput in Cosmos DB?
  23. What is automatic indexing?
  24. How do you query documents using SQL API?
  25. What SDKs are supported by Cosmos DB?

📗 Intermediate Level

  1. How does Cosmos DB handle global distribution?
  2. How do you add a region to Cosmos DB account?
  3. How does multi-master replication work?
  4. What is a composite index in Cosmos DB?
  5. What is a spatial index in Cosmos DB?
  6. How do you optimize RU usage?
  7. What are stored procedures in Cosmos DB?
  8. How do triggers work in Cosmos DB?
  9. What is a User Defined Function (UDF)?
  10. How do transactions work in Cosmos DB?
  11. How does Cosmos DB handle large data volumes?
  12. What is the change feed in Cosmos DB?
  13. How do you use change feed processor?
  14. How does Cosmos DB ensure low latency?
  15. What is the difference between single-region and multi-region writes?
  16. What is failover priority in Cosmos DB?
  17. How do you monitor Cosmos DB performance?
  18. How do you set alerts in Cosmos DB?
  19. What is indexing policy in Cosmos DB?
  20. How do you handle TTL (Time-to-Live) in Cosmos DB?
  21. How do you delete data using TTL?
  22. How do you handle large queries in Cosmos DB?
  23. How do you use LINQ queries with Cosmos DB SDK?
  24. How do you migrate data into Cosmos DB?
  25. How do you handle conflicts in multi-master Cosmos DB?

📕 Advanced Level

  1. How do you design partition strategy for high-scale workloads?
  2. How do you optimize queries for RU efficiency?
  3. How do you design globally distributed applications with Cosmos DB?
  4. How does Cosmos DB handle multi-region replication conflicts?
  5. What is analytical store in Cosmos DB?
  6. How does Cosmos DB Synapse Link work?
  7. How do you perform bulk import/export in Cosmos DB?
  8. How do you manage throughput across multiple containers?
  9. How do you implement geo-redundancy in Cosmos DB?
  10. What are the trade-offs between single-region and multi-region writes?
  11. How do you configure consistency level at query time?
  12. How do you implement change data capture using change feed?
  13. How do you handle schema evolution in Cosmos DB?
  14. How do you use Cosmos DB for real-time analytics?
  15. How do you design Cosmos DB for IoT workloads?
  16. How do you implement pagination in Cosmos DB queries?
  17. How do you monitor indexing metrics?
  18. How do you handle hot partitions in Cosmos DB?
  19. How do you optimize container design for high write workloads?
  20. How do you implement security using resource tokens?
  21. How do you use managed identities with Cosmos DB?
  22. How do you handle backups and restores in Cosmos DB?
  23. How do you implement auditing and logging in Cosmos DB?
  24. How do you scale Cosmos DB throughput dynamically?
  25. How do you tune queries for multi-region applications?

📓 Expert Level

  1. How do you design multi-tenant Cosmos DB architecture?
  2. How do you design Cosmos DB for mission-critical SLA compliance?
  3. How do you optimize cost while maintaining high availability?
  4. How do you implement distributed transactions across multiple containers?
  5. How do you design Cosmos DB for AI/ML pipelines?
  6. How do you optimize Cosmos DB for microservices architecture?
  7. How do you implement cross-region failover testing?
  8. How do you monitor Cosmos DB at enterprise scale?
  9. How do you handle disaster recovery in Cosmos DB?
  10. How do you implement schema-less data modeling best practices?
  11. How do you optimize Cosmos DB queries for heavy analytical workloads?
  12. How do you integrate Cosmos DB with Azure Event Hub and Functions?
  13. How do you implement real-time streaming using Cosmos DB change feed?
  14. How do you implement vector search in Cosmos DB?
  15. How do you manage RU sharing across multiple applications?
  16. How do you implement advanced security policies for sensitive data?
  17. How do you use Cosmos DB with Synapse Analytics for BI reporting?
  18. How do you implement caching strategies with Cosmos DB?
  19. How do you handle eventual consistency in critical applications?
  20. How do you implement cross-region data synchronization?
  21. How do you optimize Cosmos DB for hybrid cloud scenarios?
  22. How do you monitor and tune multi-master write conflicts?
  23. How do you design Cosmos DB for high-frequency IoT ingestion?
  24. How do you implement AI-based recommendations using Cosmos DB?
  25. What are emerging features and best practices for future-proof Cosmos DB architecture?

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