Exam Simulator: Development with AWS Services

You just noticed that some of your requests that your application makes to the database and HTTP web API take an enormous amount of time without affecting other aspects of your app.

Which of the following AWS service should you use to troubleshoot the issue?

Your project manager instructs you to collect all the segments generated by the POST and GET requests that travel through a load balancer, hits your application code, and generates downstream calls to other AWS services. Then he will be able to track the latency of the requests.

Which of the following AWS X-Ray tools should you use to meet the requirement?

You are developing an Amazon Kinesis Data Streams that performs calculations on the stream of stock data. You need to adjust the number of shards in your stream to adapt to changes in the rate of data flow through the stream.

Which of the following resharding operation should you use to double the stream’s capacity?

Your company just migrated to AWS due to the limitations of the on-premises data center. Your manager then assigned you a task to build a new serverless architecture to automate the building, testing, and deployment of the serverless applications.

Which of the following AWS service should you use to meet the requirements?

The manager instructs you to use Amazon RDS on AWS Outposts to automated maintenance, backups, and upgrades of DB instances.

Which of the following features are NOT supported on Amazon RDS with AWS Outposts? (Choose all that apply.)

You need to create a workflow that runs a group of Lambda functions (steps) in a specific order. One Lambda function’s output passes to the next Lambda function’s input. The last step in your workflow gives a result.

Which of the following AWS services should you use to see how each step in your workflow interacts with one another, so you can make sure that each step performs its intended function?

You have just developed a new social media web application using NodeJS and ReactJS. Now you are in the process of developing a native mobile application for the social media web-app using React Native.

Which of the following services should you use to synchronize user profile data across mobile devices and web applications?

Which of the following Cluster query expressions selects instances in the us-east-1a or us-east-1b Availability Zone?

On ExamsDigest we are using Amazon DynamoDB to store all the courses as it is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability.

Which of the following AWS CLI commands shows how to read an item from the ExamsDigestCourses table?

Consider a table named GameScores that tracks users and scores for a mobile gaming application. Each item in GameScores is identified by a partition key (UserId) and a sort key (GameTitle). The following diagram shows how the items in the table would be organized. (Not all of the attributes are shown.)

Now suppose that you wanted to write a leaderboard application to display top scores for each game. What you can do to speed up the queries?

Imagine that you have customers from all over the world that upload files to a centralized bucket. You need to provide fast, easy, and secure transfer of the files over long distances between your clients and an S3 bucket.

Which of the following tool should you use to meet the requirement?

Your online educational app is uploading a huge amount of files (courses, practice exam tests, assignments) in the S3 bucket. The size of the objects is over 150MB. The time required to upload the objects to the bucket in a single operation is not acceptable.

Which of the following tools should you use to improve the throughput and optimize the upload time?

You are building a serverless application using AWS Lambda to send and receive messages to and from individual users or groups of users in a chat room.

Which AWS service should you use in conjunction with the AWS Lambda to build the app?

You are developing an application that stores data to an Amazon DynamoDB table. You have enabled DynamoDB Streams as the application automatically sends notifications to the mobile devices of all friends in a group as soon as one friend uploads a new picture.

Assuming your AWS components are set up in Europe (Frankfurt). Which of the following endpoints you will use to access DynamoDB Streams?

You have created an Amazon Simple Workflow Service (Amazon SWF) workflow for your e-commerce app. Amazon SWF coordinates and manages the e-commerce order-processing workflow, from verifying the order to saving the order details if the order is shipped. You need to test a new implementation of a workflow while keeping the existing workflow in production.

Which of the following SWF options will you use to test the new implementation of a workflow while keeping the current in production?

You are designing the cloud architecture of an application that will be used by a company that has a hundred employees. The company needs to ensure that the architecture is elastic enough to adequately match the supply of resources to the demand while maintaining its cost-effectiveness.

Which of the following services can make the architecture elastic enough to meet the requirement? (Choose all that apply.)

In a NoSQL database such as DynamoDB, data can be queried flexibly, but queries are relatively expensive and don’t scale well in high-traffic situations.

You want to declare stage variables for two deployment stages of a sample API by using the Amazon API Gateway console. You have already signed in to the API Gateway console at https://console.aws.amazon.com/apigateway.

Which of the following is the next step in order to declare stage variables?

You are working for an eCommerce multi-vendor marketplace startup. You have been tasked to create the business process workflow associate with an order fulfillment system and track ordering system.

What AWS service can assist with coordinating tasks across distributed application components?

You are working on a bookkeeping accountant application for a startup. Your project manager asked you to have the ability to automatically transfer obsolete data from their S3 bucket to a low-cost storage system in AWS.

Which of the following solution will you use to meet the requirement?