SAA-C03 Anki Flashcards

Which AWS service can you use to set up your password rotation policy?

IAM

What are the caching engines supported by ElastiCache?

ElastiCache supports Memcache and Redis.

Does Route53 support MX records?

Yes.

Why is ElastiCache useful?

ElastiCache improves application performance by retrieving information from faster, managed, in-memory caches instead of relying on slower disk-based databases.

What is DMS used for?

Database Migration Service (DMS) allows you to migrate your production database to AWS.

What are the two different types of backups for AWS?

Automated Backups and Database Snapshots.

What is the retention period for 'Automated Backups'?

The retention period for Automated RDS backups can be between 1 and 35 days.

Where are the 'Automated Backups' of RDS stored?

They are stored in S3.

How do 'automated backups' and 'DB snapshots' differ?

Automated backups are enabled by default; DB snapshots are initiated manually.

Can you encrypt an existing RDS instance using AWS KMS?

No, existing instances cannot be encrypted.

What is the advantage of multi-AZ deployment?

Multi-AZ deployment provides failover to another AZ automatically in case of an instance failure.

When will AWS failover to the standby RDS instance?

During planned DB maintenance, instance failure or AZ failure.

Does multi-AZ RDS help in performance improvement?

False.

Read replicas are used for disaster recovery. True or False?

False.

Aurora supports multi-AZ by default. True or False?

True.

How many read replicas can you have of your main database?

Upto five.

Can you configure the secondary instance in a multi-AZ deployment to serve as the read replica?

No.

What types of data should be stored in ElastiCache?

Results of I/O intensive operations and computationally-intensive calculations.

What is DynamoDB's latency support?

Single-digit millisecond latency.

What media is DynamoDB stored on?

SSD storage.

How many areas is a DynamoDB instance spread across?

Three geographically distinct data centres.

What are the two consistency models available for DynamoDB?

Eventual Consistent Read and Strongly Consistent Read.

What is the disadvantage of using read replicas?

Latency might increase.

What are ephemeral ports?

Ports in the range of 1024-65535.

How does SQS long polling work?

Returns immediately in short polling, but does not return until a message arrives or the long poll times out.

What is the default visibility time out for messages in SQS?

12 hours.

What are CloudWatch logs used for?

Useful for application-level monitoring by storing and aggregating logs.

What does 'aws configure' do?

Configures credentials in the terminal window used to connect to EC2 instance.

What is the availability guarantee for Lambda?

99.99% availability.

What does CName stand for?

Canonical Name.

What is the charge if AWS terminates your spot instance?

You get the hour it was terminated in for free.