Top 21 Amazon AWS Interview Questions and answers for 2018

AWS Certified Solutions Architect wins the classification of top 15 high-wage IT certification trainings, as Forbes reported. AWS Solution Architect position is one of the most sought after amongst IT jobs. After the completion of our AWS training certification course, we want you to crack the interview in any IT firm with ease, and that’s why we are here with the set of top AWS interview questions. Here are top 21 AWS interview questions to test your skills.

Below are the top AWS Amazon web service interview question and answer

1) Explain what is AWS?

AWS stands for Amazon Web Service. It is a platform which provides secure cloud services, database storage, offerings to compute power, content delivery, and other services to help business level and develop. It is a collection of remote computing services also known as cloud computing platform.  This new domain of cloud computing is also known as IaaS or Infrastructure as a Service.

2) Write in brief about S3?

S3 stands for Simple Storage Service. You can use S3 interface to store and retrieve any amount of data, at any time and from anywhere on the web. S3 uses “pay as you go” payment model.  According to Amazon, S3 is storage for the Internet. They define it as a, “simple storage service that offers software developers a highly-scalable, reliable, and low-latency data storage infrastructure at very low costs”.

3) What are the different layers of cloud computing?

The three layers are:

  • Infrastructure as a Service (IaaS)
  • Platform as a Service (PaaS)
  • Software as a Service (SaaS)

4) What do you mean by AMI in terms of AWS?

AMI stands for Amazon Machine Image.  It’s a template that gives the information, which is required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud.  You can launch samples from as numerous different AMIs as you need.

5) How is buffer important in AWS?

A buffer is capable of synchronizing different components and makes the arrangement additional elastic to a burst of load or traffic. The components are likely to work in an unstable way of receiving and organizing the requests. The buffer creates the balance by linking various apparatus and crafts them effort at the identical rate to supply more rapid services.

6) What is Redshift?

Redshift is easy, scalable, fully configured, petabyte size data warehouse service. Its features makes it easier and cost-efficient to analyze your entire data with the existing business intelligence tools.

7) Explain few features of Amazon EC2?

Virtual computing environments, known as instances

  • Multiple physical locations for your resources, such as instances and Amazon EBS volumes, known as regions and Availability zones.
  • A firewall that enables you to specify the protocols, ports, and source IP ranges that can reach your instances using security groups.
  • Static IPv4 addresses for dynamic cloud computing, known as Elastic IP addresses
  • Metadata, known as tags, that you can create and assign to your Amazon EC2 resources.

8) How can you differentiate between EC2 and Amazon S3?

  • EC2 is a cloud web service used for hosting your application
  • Amazon S3 is a data storage system where any amount of data can be stored
  • EC2 is like a huge computer machine that can run on both Linux and Windows. It is capable of handling applications like PHP, Python, Apache or any databases
  • Amazon S3 has a REST interface and uses secure HMAC-SHA1 authentication keys

9) State the difference between flexibility and scalability.

The flair of any scheme is to intensify the tasks on hand on its present hardware resources to grip inconsistency in direction is known as scalability. The capability of a scheme to augment the in-hand task on its current and supplementary hardware property is recognized as flexibility, hence enabling the industry to convene command devoid of putting in the infrastructure at all.

10) How can you secure your data while carrying in the cloud?

One thing must be ensured that no one should seize the information in the cloud while data is moving from point one to another and also there should not be any leakage with the security concerns from several storerooms associated in the cloud. Collaboration of information from other companies’ information and then encrypting it by means of approved methods is one of the options.

11) What type of network interpretation framework can you expect when you launch instances in your cluster placement group?

The network performance of the cluster placement depends on the instance type and network performance specification, only if it is launched in a placement group, then you can expect up to

  • 10 Gbps in a single-flow,
  • 20 Gbps in multiflow i.e., full duplex
  • Network traffic that you calculate outside the placement group will be limited to 5 Gbps(full duplex).

12) Where do you think AMI fits in designing architecture for solution?

AMIs(Amazon Machine Images) are like templates of virtual machines and an instance is derived from an AMI. AWS offers unique sample AMIs, out of which you can choose the favorable for you, while you are launching an instance. Some AMIs are not free, therefore can be purchased from the AWS Marketplace. You can always choose to create your custom AMI that would help you save space on AWS. For example if you don’t need a set of software on your installation, you can customize your AMI to do that. This makes it cost efficient, since you are removing the unwanted things.

13) What is auto scaling and how does it work?

The feature of AWS like autoscaling enables you to create and automatically provision and spinup new instances, without your intervention. You can do this by setting thresholds and metrics to monitor. Once the thresholds are crossed, you can opt for a new instance of your choice will be spun up, configured, and rolled into the load balancer pool.

14) Is it possible to change the private IP addresses of an EC2 while it is running/stopped in a VPC?

Primary private IP address is attached with the instance throughout its lifetime and cannot be changed, however secondary private addresses can be unassigned, assigned or moved between interfaces or instances at any point.

15) Which AWS services will you use to collect and process e-commerce data for near real-time analysis?

Amazon Dynamo DB and Amazon Red shift are used to process e-commerce data for real time analysis. Dynamo DB is a fully managed No SQL database service. Dynamo DB, therefore can be fed any type of unstructured data, which can be data from e-commerce websites as well, and later, an analysis can be done on them using Amazon Red shift. We are not using Elastic Map Reduce, since a near real time analyses is needed.

16) What happens to my backups and DB Snapshots if I delete my DB Instance?

When you delete a DB instance, you have an option of creating a final DB snapshot, if you do that you can restore your database from that snapshot. RDS retains this user-created DB snapshot along with all other manually created DB snapshots after the instance is deleted, also automated backups are deleted and only manually created DB Snapshots are retained.

17) What automation tools can you use to spinup servers?

Any of the following tools can be used:

  • Roll-your-own scripts, and use the AWS API tools.  Such scripts could be written in bash, perl or other language or your choice.
  • Use a configuration management and provisioning tool like puppet or its successor Opscode Chef.  You can also use a tool like Scalr.
  • Use a managed solution such as Right scale.

18) What are lifecycle hooks used for in Auto Scaling?

Lifecycle hooks are used for putting wait time before any lifecycle action i.e launching or terminating an instance happens. The purpose of this wait time, can be anything from extracting log files before terminating an instance or installing the necessary softwares in an instance before launching it.

19) What is relation between instance and AMI?

An Amazon Machine Image (AMI) is a template that contains a software configuration (for example, an operating system, an application server, and applications). From an AMI, you launch an instance, which is a copy of the AMI running as a virtual server in the cloud.

You can launch different types of instances from a single AMI. An instance type determines the hardware of the host computer used for your instance. Each instance type offers different compute and memory capabilities.

20) How many data centers are deployed for cloud computing? What are they?

There are two data centers in cloud computing:

  • Containerized Data centers
  • Low Density Data centers

21) What happens if my application stops responding to requests in beanstalk?

AWS Beanstalk applications have a system in place for avoiding failures in the underlying infrastructure. If an Amazon EC2 instance fails for any reason, Beanstalk will use Auto Scaling to automatically launch a new instance. Beanstalk can also detect if your application is not responding on the custom link, even though the infrastructure appears healthy, it will be logged as an environmental event( e.g a bad version was deployed) so you can take an appropriate action.

Hope the above AWS cloud interview question and answer will help to get your dream job in aws cloud field

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