Monday, March 25, 2024

Aws Interview Questions For Experienced Professionals

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Demonstration And Use Case: Lamp Stack On An Ec2 Instance

Important AWS Interview Questions Solved 2022 | Amazon Web Services Tutorial | SCALER

The final sections of the video demonstrate how to put AWS CloudFormation to work through two examples:

  • LAMP stack on an EC2 instance
  • Building a complicated environment that includes an elastic load balancer, auto-scaling, and an EC2 instance, which allows access to the website only through the load balancer and restricts access when accessed directly from the instance
  • What Is Elastic Transcoder

    In the AWS cloud, the Elastic Transcoder is used for converting media files into versions that can be run/played on devices such as Tablets, PCs, Smartphones, etc. It consists of advanced transcoding features with conversion rates starting from $ 0.0075 per minute.

    Learn more about in the blog by intellipaat.

    What Was The Most Difficult Interaction You Had With A Customer

    Sample Answer:

    The most difficult customer interaction that I have ever had was working at a call center for a cell phone company. I was helping a customer trying to upgrade his phone, but he was having trouble because his old phone was still under contract. He became extremely angry and began to shout at me. He accused me of being incompetent and of trying to cheat him. I felt like I would lose my temper, but I managed to stay calm and resolve the issue to his satisfaction.

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    Aws Database Interview Questions

  • Differentiate between reserved instances and on-demand DB instances.
  • Which scaling type is recommended for RDS?
  • Explain the concept of a maintenance window in Amazon RDS.
  • Is a DB instance available during maintenance events?
  • Describe the consistency models in DynamoDB.
  • Which query functionality is supported by DynamoDB?
  • Is It Possible To Use Amazon S3 With Ec2 Instances Please Elaborate

    AWS cloud support engineer interview questions  Learnersreference.com

    Yes, it is possible to use Amazon S3 with EC2 instances. It can be used for instances with root devices backed by the local instance storage. Amazon provides an array of tools to load the AMIs into Amazon S3 and to move them amongst Amazon S3 and Amazon EC2 instances.

    With , AWS developers enjoy accessing the same highly fast, reliable, inexpensive, and scalable data storage infrastructure used by Amazon to operate its very own global network of websites and services.

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    Your Companys Branch Offices Are All Over The World They Use A Software With A Multi

    The task is to run an hourly batch process and read data from every region to compute cross-regional reports which will be distributed to all the branches. This should be done in the shortest time possible. How will you build the DB architecture in order to meet the requirements?

  • For each regional deployment, use RDS MySQL with a master in the region and a read replica in the HQ region
  • For each regional deployment, use MySQL on EC2 with a master in the region and send hourly EBS snapshots to the HQ region
  • For each regional deployment, use RDS MySQL with a master in the region and send hourly RDS snapshots to the HQ region
  • For each regional deployment, use MySQL on EC2 with a master in the region and use S3 to copy data files hourly to the HQ region
  • Answer A.

    Explanation: For this we will take an RDS instance as a master, because it will manage our database for us and since we have to read from every region, well put a read replica of this instance in every region where the data has to be read from. Option C is not correct since putting a read replica would be more efficient than putting a snapshot, a read replica can be promoted if needed to an independent DB instance, but with a Db snapshot it becomes mandatory to launch a separate DB Instance.

    Stacks In Aws Cloudformation

    A collection of AWS resources is called a stack, and it can be managed in a single unit. CloudFormations template defines a stack in which the resources can be created, deleted or updated in a predictable way. A stack can have all the resources required to run a web application.

    A nested stack results in a hierarchy of stacks. Using the CloudFormation stack resource, you can create a nested stack within another stack.

    A Windows stack gives you the ability to update and configure your own stack in Windows instances. With AWS CloudFormation, you can create Microsoft Windows stacks for Amazon EC2s Windows AMI .

    Using an AWS CloudFormation template, you can define a StackSet that lets you create stacks in AWS accounts around the globe using a single template. After a StackSet is defined by you, creating, updating or deleting stacks in the target accounts and regions can also be specified.

    Do you think you are skilled enough to get certified as an AWS Solution Architect? Well, find out today by answering these AWS Certification Dumps!

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    In Cloudfront What Happens When Content Is Not Present At An Edge Location And A Request Is Made To It

  • An Error 404 not found is returned
  • CloudFront delivers the content directly from the origin server and stores it in the cache of the edge location
  • The request is kept on hold till content is delivered to the edge location
  • The request is routed to the next closest edge location
  • Answer B.

    Explanation: CloudFront is a content delivery system, which caches data to the nearest edge location from the user, to reduce latency. If data is not present at an edge location, the first time the data may get transferred from the original server, but from the next time, it will be served from the cached edge.

    In Aws Three Different Storage Services Are Available Such As Efs S3 And Ebs When Should I Use Amazon Efs Vs Amazon S3 Vs Amazon Elastic Block Store

    AWS Interview Questions | AWS Interview Questions And Answers 2022 | AWS Training | Simplilearn

    Amazon Web Services offers cloud storage services to support a wide range of storage workloads.

    Amazon EFS is a file storage service for use with Amazon compute and on-premises servers. Amazon EFS provides a file system interface, file system access semantics , and concurrently accessible storage for up to thousands of Amazon EC2 instances.

    is a block-level storage service for use with Amazon EC2. Amazon EBS can deliver performance for workloads that require the lowest latency access to data from a single EC2 instance.

    Amazon S3 is an object storage service. Amazon S3 makes data available through an Internet API that can be accessed anywhere

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    Differentiate Between Vertical And Horizontal Scaling In Aws

    The main difference between vertical and horizontal scaling is how you add compute resources to your infrastructure. In vertical scaling, more power is added to the existing machine. In contrast, in horizontal scaling, additional resources are added to the system with the addition of more machines into the network so that the workload and processing are shared among multiple devices. The best way to understand the difference is to imagine retiring your Toyota and buying a Ferrari because you need more horsepower. This is vertical scaling. Another way to get that added horsepower is not to ditch the Toyota for the Ferrari but buy another car. This can be related to horizontal scaling, where you drive several cars simultaneously.

    When the users are up to 100, an Amazon EC2 instance alone is enough to run the entire web application or the database until the traffic ramps up. Under such circumstances, when the traffic ramps up, it is better to scale vertically by increasing the capacity of the EC2 instance to meet the increasing demands of the application. AWS supports instances up to 128 virtual cores or 488GB RAM.

    When the users for your application grow up to 1000 or more, vertical cannot handle requests, and there is a need for horizontal scaling, which is achieved through a distributed file system, clustering, and load balancing.

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    What Is Amazon Ecs

    It is known as Amazon Elastic Container Registry . It provides high-performance hosting so that you can store your application images securely in ECR. Amazon ECS compresses and encrypts images and controls access to images. The images can be simply stored in containers also, they can be accessed from the containers without the support of any management tools.

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    When Would I Prefer Provisioned Iops Over Standard Rds Storage

  • If you have batch-oriented workloads
  • If you use production online transaction processing workloads.
  • If you have workloads that are not sensitive to consistent performance
  • All of the above
  • Answer A.

    Explanation: Provisioned IOPS deliver high IO rates but on the other hand it is expensive as well. Batch processing workloads do not require manual intervention they enable full utilization of systems, therefore a provisioned IOPS will be preferred for batch oriented workload.

    What Do You Understand By Aws Policies

    AWS Blog: AWS Hiring Advice

    In AWS, policies are objects that regulate the permissions of an entity or an AWS resource. In AWS, policies are saved as JSON objects. Identity-based policies, resource-based policies, permissions borders, Organizations SCPs, ACLs, and session policies are the six categories of policies that AWS offers.

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    What Is Amazon Virtual Private Cloud And How Does It Work

    A VPC is the most efficient way to connect to your cloud services from within your own data centre. When you link your datacenter to the VPC that contains your instances, each instance is allocated a private IP address that can be accessed from your datacenter. As a result, you may use public cloud services as if they were on your own private network.

    How Can You Add An Existing Instance To A New Auto Scaling Group

    Heres how you can add an existing instance to a new Auto Scaling group:

    • Open EC2 console
    • Select your instance under Instances
    • Choose Actions -> Instance Settings -> Attach to Auto Scaling Group
    • Select a new Auto Scaling group
    • Attach this group to the Instance
    • Edit the Instance if needed
    • Once done, you can successfully add the instance to a new Auto Scaling group

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    What Kind Of Careers Can You Pursue With The Background Of Cloud Computing

    With a cloud computing background, you can pursue a career as a Cloud administrator, Cloud architect, Cloud automation engineer, Cloud consultant, Cloud engineer, Cloud security analyst, and Cloud software engineer. You can simply opt for a cloud computing course or cloud architect certification, and you are good to pursue a lucrative career in cloud computing.

    If You Want To Launch Amazon Elastic Compute Cloud Instances And Assign Each Instance A Predetermined Private Ip Address You Should:

    AWS Interview Questions | AWS Interview Questions for Solutions Architect | Intellipaat
  • Launch the instance from a private Amazon Machine Image .
  • Assign a group of sequential Elastic IP address to the instances.
  • Launch the instances in the Amazon Virtual Private Cloud .
  • Launch the instances in a Placement Group.
  • Answer C.

    Explanation:The best way of connecting to your cloud resources from your own data center is a VPC. Once you connect your datacenter to the VPC in which your instances are present, each instance is assigned a private IP address which can be accessed from your datacenter. Hence, you can access your public cloud resources, as if they were on your own network.

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    Tell Me When You Took An Unpopular Stance In A Meeting With Peers And Your Leader And You Were The Outlier

    Sample Answer:

    I was the outlier in a meeting when working at my previous job. We discussed a new project, and I was the only one against it. My boss and coworkers were pushy and tried to convince me to go along with the project, but I stuck to my guns and said no. They went ahead with the project without me, and it failed miserably.

    I learned two things from that experience. First, always trust your gut instinct. If you don’t feel right about something, there’s probably a good reason for it. Second, it’s important to be assertive and stand up for what you believe in, even if it means going against the majority.

    What Is Amazon S3 Glacier

    It is a storage class built for data archiving, which helps retrieve data with high flexibility and performance. So, data can be accessed faster in milliseconds, and S3 Glacier offers a low-cost service. There are three S3 glacier storage classes Glacier instant retrieval storage, S3 Glacier flexible retrieval, and S3 Glacier deep archive.

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    What Are Elastic Load Balancing And Its Types

    Elastic Load Balancing automatically directs incoming application traffic to various destinations and virtual appliances. In fact, the destinations and virtual appliances may be in one or more availability zones. In this service, you can secure your applications using tools such as integrated certificate management, SSL/TLS decryption methods, and user authentication.

    There are three types of load balancers such as Application Load Balancer, Gateway Load Balancer, and Network Load Balancer.

    Mention The Differences Between Aws Lambda And Amazon Ecs

    Sapsmart Amazon Web Services (Aws) Online Interview Video Learning ...
    • AWS Lambda is a serverless and event-driven computing service that helps run codes without provisioning or managing servers. At the same time, Amazon manages servers, unlike Amazon Lambda.
    • AWS Lambda can support selective languages on the other hand, ECS can support any language to run codes on containers.
    • AWS Lambda will be helpful to run easy and quick functions, whereas ECS can be used to run any size of codes and complexity
    • In AWS Lambda scaling can be carried out automatically on the other hand, ECS container service requires managing servers and infrastructure according to the demands.

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    What Are The Pricing Models For Ec2 Instances

    There are four pricing models for EC2 instances:

    • On-Demand instance
    • On-Demand pricing is also known as pay-as-you-go. Pay-as-you-go is a pricing model that allows you to pay only for those resources that you use.
    • You need to pay for the compute capacity by per hour or per second that depends on which instances you run.
    • On-Demand instance does not require any upfront payments.
    • While using On-Demand instance, you can increase or decrease the compute capacity based on the requirements of your application.
    • On-Demand instances are recommended for those applications which are of short term and unpredictable workloads.
    • Users that want low cost and flexibility on EC2 instances with no upfront payments.
    • On-Demand instances are used for those applications which have been developed or tested on EC2 for the first time.
  • Reserved instance
  • Reserved instance is the second most important pricing model that reduces the overall cost of your AWS environment by making an upfront payment for those services that you know will be used in the future.
  • Reserved instances provide a discount of up to 75% as compared to On-Demand instance.
  • Reserved instances are assigned to a specific Availability zone that reserves the compute capacity for you so that you can use whenever you need.
  • Reserved instances are mainly recommended for those applications that have steady state and require reserve capacity.
  • Spot instances consist of unused capacity which is available at a highly discounted rate.
  • Mention What The Security Best Practices For Amazon Ec2 Are

    For secure Amazon EC2 best practices, follow the following steps

    • Use AWS identity and access management to control access to your AWS resources
    • Restrict access by allowing only trusted hosts or networks to access ports on your instance
    • Review the rules in your security groups regularly
    • Only open up permissions that you require
    • Disable password-based login, for example, launched from your AMI

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    What Do You Understand By Geo

    Geo-targeting in the CloudFront supports the creation of customized content for a target audience as suggested by demand and the needs of a specific geographical area. This helps businesses showcase their personalized content to the target audience in different geographic locations without changing its URL.

    Why Did You Leave Your Last Job

    Solutions Architect Interview Questions AWS

    The best way to answer these questions is, to be honest. Try not to forget to add your learnings from the situation and how you have overcome those problems.

    Take care of yourself not to speak ill of your former employer, colleagues, or the job. Your attempt and approach should be to make the answer as positive as you can. So, it will be beneficial to make a good impression on you.

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    How Is Stopping And Terminating An Instance Different From Each Other

    Starting, stopping and terminating are the three states in an EC2 instance, lets discuss them in detail:

    • Stopping and Starting an instance: When an instance is stopped, the instance performs a normal shutdown and then transitions to a stopped state. All of its Amazon EBS volumes remain attached, and you can start the instance again at a later time. You are not charged for additional instance hours while the instance is in a stopped state.
    • Terminating an instance: When an instance is terminated, the instance performs a normal shutdown, then the attached Amazon EBS volumes are deleted unless the volumes deleteOnTermination attribute is set to false. The instance itself is also deleted, and you cant start the instance again at a later time.

    What Are Regions And Availability Zones In Aws

    Regions: A region is a geographical area which consists of 2 or more availability zones. A region is a collection of data centers which are completely isolated from other regions.

    Availability zones: An Availability zone is a data center that can be somewhere in the country or city. Data center can have multiple servers, switches, firewalls, load balancing. The things through which you can interact with the cloud reside inside the Data center.

    If you want to know more about the Availability zone and region, then click on the link shown below:

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