Why DynamoDB for NoSQL in AWS - Quick Recap

Recall & Review

beginner

What type of database is DynamoDB?

DynamoDB is a fully managed NoSQL database service that supports key-value and document data models.

beginner

How does DynamoDB handle scaling?

DynamoDB automatically scales throughput capacity to meet application demands without downtime or manual intervention.

intermediate

Why is DynamoDB considered highly available?

DynamoDB stores data across multiple servers and Availability Zones, ensuring continuous availability and fault tolerance.

beginner

What is a key benefit of DynamoDB's managed service model?

It removes the need to manage hardware, software, or setup, letting developers focus on building applications.

intermediate

How does DynamoDB support fast data access?

DynamoDB uses SSD storage and in-memory caching with DAX to provide low-latency responses for high-performance applications.

What data models does DynamoDB support?

A Key-value and document

B Relational and graph

C Columnar and relational

D Graph and document

DynamoDB supports key-value and document data models, making it flexible for many NoSQL use cases.

Which feature helps DynamoDB handle sudden traffic spikes?

A Manual scaling

B Automatic scaling

C Scheduled backups

D Data sharding

DynamoDB automatically adjusts throughput capacity to handle traffic spikes without downtime.

What ensures DynamoDB's high availability?

A Data replication across multiple Availability Zones

B Single data center storage

C Manual failover

D Local backups only

DynamoDB replicates data across multiple Availability Zones and servers to ensure availability and fault tolerance.

What is a key advantage of DynamoDB being fully managed?

A You must install software manually

B You manage hardware yourself

C Requires manual backups

D No need to manage infrastructure

Being fully managed means AWS handles infrastructure, so developers focus on application logic.

How does DynamoDB achieve low latency for reads?

A Batch processing

B Using HDD storage

C In-memory caching with DAX

D Manual indexing

DynamoDB Accelerator (DAX) provides in-memory caching to speed up read operations.

Explain why DynamoDB is a good choice for NoSQL applications.

Think about ease of use, performance, and reliability.

Describe how DynamoDB handles scaling and availability.

Focus on how DynamoDB keeps apps running smoothly under load.