AWS DocumentDB Interview Preparation: Top 10 Questions

I can provide you with a list of the top 10 AWS DocumentDB interview questions along with their answers:

1. Q: What is AWS DocumentDB?
   A: AWS DocumentDB is a fully managed, MongoDB-compatible document database service that provides fast, scalable, and highly available storage for your applications.

2. Q: What are the key features of AWS DocumentDB?
   A: AWS DocumentDB offers features like scalability, automatic backups, point-in-time recovery, multi-AZ deployments, encryption at rest, and compatibility with MongoDB applications.

3. Q: How does AWS DocumentDB handle scalability?
   A: AWS DocumentDB uses a distributed, fault-tolerant architecture that automatically scales storage capacity up to 64 TB. It also supports read scaling by allowing you to create up to 15 read replicas.

4. Q: Can I migrate my existing MongoDB applications to AWS DocumentDB?
   A: Yes, AWS DocumentDB is designed to be compatible with existing MongoDB applications. You can easily migrate your data and applications to AWS DocumentDB without making significant code changes.

5. Q: How does backup and recovery work in AWS DocumentDB?
   A: AWS DocumentDB automatically backs up your database and stores backups for a specified retention period. You can also create manual snapshots for longer-term backups or point-in-time recovery.

6. Q: Can I enable encryption for data at rest in AWS DocumentDB?
   A: Yes, AWS DocumentDB supports encryption at rest. You can enable encryption during the cluster creation process, and it uses AWS Key Management Service (KMS) to manage the encryption keys.

7. Q: What is the difference between AWS DocumentDB and Amazon DynamoDB? A: AWS DocumentDB is a document database service that is compatible with MongoDB, while Amazon DynamoDB is a NoSQL database service that offers key-value and document data models.

8. Q: How can I secure access to AWS DocumentDB?
   A: You can secure access to AWS DocumentDB by using AWS Identity and Access Management (IAM) roles, which allow you to control who can access your clusters and what actions they can perform.

9. Q: How do I monitor the performance of my AWS DocumentDB clusters?
   A: AWS DocumentDB provides metrics and logs that can be monitored using Amazon CloudWatch. You can set up alarms based on these metrics to get notifications for any performance issues.

10. Q: Can I integrate AWS DocumentDB with other AWS services?

    A: Yes, AWS DocumentDB can be integrated with other AWS services like AWS Lambda, Amazon VPC, AWS PrivateLink, AWS CloudFormation, and AWS Data Pipeline, among others, to build scalable and flexible applications.

Remember, these questions serve as a starting point for your preparation. It's essential to dive deeper into each topic, explore related concepts, and practice hands-on with AWS DocumentDB to gain a comprehensive understanding.