AWS DEV: Quizzes, Cheat Sheets, Flash Cards, Mock Exams, FAQs

1

AWS Lambda: Layers
Users can configure an AWS Lambda function to pull in additional code and content in the form of layers. A layer is a .zip archive that contains libraries, a custom runtime, or other dependencies. With layers, users can use libraries in a function without needing to include the libraries in a deployment package.

2

Amazon API Gateway: Stages
With deployment stages in Amazon API Gateway, users can manage multiple release stages for each API, such as alpha, beta, and production. Using stage variables that can be configured, an API deployment stage can interact with different backend endpoints. Users can use API Gateway stage variables to reference a single AWS Lambda function with multiple versions and aliases.

3

EBS Provisioned IOPS SSD
EBS Provisioned IOPS SSD provides sustained performance for mission-critical low-latency workloads. EBS General Purpose SSD can provide bursts of performance up to 3,000 IOPS and have a maximum baseline performance of 10,000 IOPS for volume sizes greater than 3.3 TB. The 2 HDD options are lower cost, high throughput volumes.

4

Amazon Redshift Cluster: Security group
A security group can grant access to traffic from the allowed networks via the CIDR range for each network. VPC peering and VPN are connectivity services and cannot control traffic for security. Amazon Redshift user accounts address authentication and authorization at the user level and have no control over network traffic.

5

AWS Auto Scaling
AWS Auto Scaling continually monitors your applications to make sure that they are operating at your desired performance levels. When demand spikes, AWS Auto Scaling automatically increases the capacity of constrained resources so you maintain a high quality of service.

6

Elastic IP cost
Elastic IPs are static, and, as long as you use them, there is no charge

7

HA: Instance Reservation
For any instances that need to be available consistently, instance reservation makes sense. This is a potential way to reduce costs. Multi-AZ is generally not worth the additional costs for dev environments.

8

Reduce database costs:
Aurora Serverless can scale down to zero instances during periods of no load. There is a brief startup time, but because of the shared storage, it happens in less than a minute.
Configure a lambda to be invoked by a Cloud Watch metric for the application and have the lambda function shut down and start up the RDS instance when needed.

9

You have a collection of several million JSON documents. You want to store their data within AWS. The data needs to be searchable based on a unique ID in the JSON, and the searches need to be available from a public endpoint. The data is important, so it needs to be able to survive an AZ failure in AWS, and the data latency needs to be in the low milliseconds. What service should you suggest?
DynamoDB offers low latency, can store data for querying, and replicates data across AZs in the region the table is created in.

10

DAX
DAX is a DynamoDB-compatible caching service that enables you to benefit from fast in-memory performance for demanding applications. DAX addresses three core scenarios:
1) As an in-memory cache, DAX reduces the response times of eventually-consistent read workloads by an order of magnitude, from single-digit milliseconds to microseconds.
2) DAX reduces operational and application complexity by providing a managed service that is API-compatible with Amazon DynamoDB, and thus requires only minimal functional changes to use with an existing application.
3) For read-heavy or bursty workloads, DAX provides increased throughput and potential operational cost savings by reducing the need to over-provision read capacity units. This is especially beneficial for applications that require repeated reads for individual keys.

11

What is IaC? How you will achieve this?
Infrastructure as Code (IaC) is the management of infrastructure (networks, virtual machines, load balancers, and connection topology) in a descriptive model, using the same versioning as DevOps team uses for source code. This will be achieved by using the tools such as CloudFormation, Chef, Puppet and Ansible etc

12

What is multifactor authentication? What is the use of it?
Multifactor authentication (MFA) is a security system that requires more than one method of authentication from independent categories of credentials to verify the user’s identity for a login or other transaction.
- Security for every enterprise user — end & privileged users, internal and external

- Protect across enterprise resources — cloud & on-prem apps, VPNs, endpoints, servers, privilege elevation and more

- Reduce cost & complexity with an integrated identity platform

13

How do you handle the merge conflicts in git?
Follow the steps
1. Create Pull request

2. Modify according to the requirement by sitting with developers

3. Commit the correct file to the branch

4. Merge the current branch with master branch.

14

How to deploy docker container to aws?
Amazon provides the service called Amazon Elastic Container Service; By using this creating and configuring the task definition and services we will launch the applications

15

What is the job Of HTTP REST API in DevOps?
As DevOps is absolutely centers around Automating your framework and gives changes over the pipeline to various stages like an every CI/CD pipeline will have stages like form, test, mental soundness test, UAT, Deployment to Prod condition similarly as with each phase there are diverse devices is utilized and distinctive innovation stack is displayed and there should be an approach to incorporate with various instrument for finishing an arrangement toolchain, there comes a requirement for HTTP API , where each apparatus speaks with various devices utilizing API , and even client can likewise utilize SDK to interface with various devices like BOTOX for Python to contact AWS API’s for robotization dependent on occasions , these days its not cluster handling any longer , it is generally occasion driven pipelines