What is AWS Storage Gateway?
A file gateway that supports a file interface into Amazon S3 and combines a service and a virtual software appliance. By using this combination, you can store and retrieve objects in S3 using industry-standard file protocols such as NFS and SMB.
Can an AMI be be launched from any region?
No, AMI are region specific.
What is IAM Policy Simulator?
- Lets you test IAM policies before you commit them to production
- Validate that the policy works as expected
- Can also test policies attached to existing users - great for troubleshooting
Your mission-critical web application needs to store its session state so that it can be accessed quickly and is highly available. Which service should you use?
DynamoDB
Which of the following AWS services do not use key-value pair?
- SWF
- SNS
- Route53
- DynamoDB
Route53
Name three attacks that AWS WAF (Web Application Firewall) protects against.
- Cross-site scripting attacks
- SQL injection attacks
- Attacks from known bad IP addresses
What attack does AWS Shield protect against?
- Mainly Distributed Denial of Service.
- AWS Shield operates at layer 3 and 4 of the ISO network model
What is the purpose of Amazon Macie?
Tackles problems related to Data Loss Prevention and protects sensitive data.
You are using a Classic Load Balancer, and suddenly it starts responding with an 504 error. What is the cause?
- The application is having issues, either at the web server layer or the database layer.
- This error has nothing to do with the ELB itself
- Identify where the application is failing, and scale it up or out where possible
What is Route53?
Amazon’s DNS service.
Route53 allows you to map your domain names to …?
- EC2 instances
- Load Balancers
- S3 buckets
What are the two types of Elasticache?
- Memcached
- No persistence
- Individual nodes are expendable
- Automatic node replacement and Auto Discovery
- For object caching
- Simple
- Scales horizontally
- Good when you planning on running large cache nodes, and require multithreaded performance with utilization of multiple cores
- Redis
- Supports data structures such as sorted sets and lists
- Support Master/Slave replication
- Multi-AZ
- Redis ElastiCache clusters are managed as stateful entities that include failover
- Replication, persistence
- Good for sorting and ranking, such as leader boards
Give five examples of what the origin of CloudFront can be.
- S3 bucket
- EC2 running a website
- Elastic Load Balancer
- Route53
- Your own non-AWS origin server
In CloudFront, name the two types of distribution.
- Web distribution
- Typically used for websites
- RTMP (Real-Time Messaging Protocol)
- Used for media streaming
Can you serve Adobe Flash multimedia content from a web distribution (CloudFront)?
No, for that you will need RTMP distribution.
What is Transfer Acceleration?
- It enables fast, easy and secure transfers of files over long distances between your end user and an S3 bucket.
- It takes advantage of CloudFront’s globally distributed edge locations to transfer the data to S3 over an optimised network path.
Which are the AWS compute services?
- EC2
- Lightsail
- Lambda
- Batch
- Elastic Beanstalk
- Serverless Application Repository
- AWS Outposts
- EC2 Image Builder
Name four AWS services that are serverless.
- Lambda
- API Gateway
- S3
- DynamoDB
What is ElastiCache?
- An in-memory cache in the cloud.
- It improves performance of web applications
- It sits between the application and the database
- Takes the load off your database
- Good for read heavy applications as well as I/O intensive database queries
- E.g. good for Social Networking, gaming media sharing, Q&A portals, recommendation engines
What caching strategies exists for Elasticache?
- Lazy loading
- Write-Through
