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31 Terms
1
Which AWS service can you use to set up your password rotation policy?
IAM
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2
What are the caching engines supported by ElastiCache?
ElastiCache supports Memcache and Redis.
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3
Does Route53 support MX records?
Yes.
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4
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.
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5
What is DMS used for?
Database Migration Service (DMS) allows you to migrate your production database to AWS.
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6
What are the two different types of backups for AWS?
Automated Backups and Database Snapshots.
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7
What is the retention period for 'Automated Backups'?
The retention period for Automated RDS backups can be between 1 and 35 days.
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8
Where are the 'Automated Backups' of RDS stored?
They are stored in S3.
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9
How do 'automated backups' and 'DB snapshots' differ?
Automated backups are enabled by default; DB snapshots are initiated manually.
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10
Can you encrypt an existing RDS instance using AWS KMS?
No, existing instances cannot be encrypted.
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11
What is the advantage of multi-AZ deployment?
Multi-AZ deployment provides failover to another AZ automatically in case of an instance failure.
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12
When will AWS failover to the standby RDS instance?
During planned DB maintenance, instance failure or AZ failure.
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13
Does multi-AZ RDS help in performance improvement?
False.
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14
Read replicas are used for disaster recovery. True or False?
False.
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15
Aurora supports multi-AZ by default. True or False?
True.
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16
How many read replicas can you have of your main database?
Upto five.
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17
Can you configure the secondary instance in a multi-AZ deployment to serve as the read replica?
No.
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18
What types of data should be stored in ElastiCache?
Results of I/O intensive operations and computationally-intensive calculations.
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19
What is DynamoDB's latency support?
Single-digit millisecond latency.
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20
What media is DynamoDB stored on?
SSD storage.
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21
How many areas is a DynamoDB instance spread across?
Three geographically distinct data centres.
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22
What are the two consistency models available for DynamoDB?
Eventual Consistent Read and Strongly Consistent Read.
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23
What is the disadvantage of using read replicas?
Latency might increase.
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24
What are ephemeral ports?
Ports in the range of 1024-65535.
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25
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.
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26
What is the default visibility time out for messages in SQS?
12 hours.
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27
What are CloudWatch logs used for?
Useful for application-level monitoring by storing and aggregating logs.
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28
What does 'aws configure' do?
Configures credentials in the terminal window used to connect to EC2 instance.
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29
What is the availability guarantee for Lambda?
99.99% availability.
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30
What does CName stand for?
Canonical Name.
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31
What is the charge if AWS terminates your spot instance?
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