EMT Practice Test

1. Question Content...

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Question1: A Developer wants to debug an application by searching and filtering log dat
a. The application logs are stored in Amazon CloudWatch Logs. The Developer creates a new metric filter to count exceptions in the application logs. However, no results are returned from the logs.
What is the reason that no filtered results are being returned?

Question2: A Developer is designing a new application that uses Amazon S3. To satisfy compliance requirements, the Developer must encrypt the data at rest.
How can the Developer accomplish this?

Question3: A Developer is writing an imaging micro service on AWS Lambda. The service is dependent on several libraries that are not available in the Lambda runtime environment.
Which strategy should the Developer follow to create the Lambda deployment package?

Question4: A company that has multiple offices uses an Amazon DynamoDB table to store employee payroll information.
Item attributes consist of employee names, office identifiers, and cumulative daily hours worked. The most frequently used query extracts a report of an alphabetical subset of employees for a specific office.
Which design of the DynamoDB table primary key will have the MINIMUM performance impact?

Question5: Which of the following solutions is not supported by DynamoDB:

Question6: An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table. The correct 1AM policy already exists. What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?

Question7: How can a developer use a debugger for AWS Lambda code that is deployed with AWS Serverless Application Model (AWS SAM)?

Question8: A company is developing an application that will run on several Amazon EC2 instances in an Auto Scaling group and can access a database running on Amazon EC2. The application needs to store secrets required to connect to the database. The application must allow for periodic secret rotation, and there should be no changes to the application when a secret changes.
What is the SAFEST way to meet these requirements?

Question9: A user is planning to make a mobile game which can be played online or offline and will be hosted on EC2. The user wants to ensure that if someone breaks the highest score or they achieve some milestone they can inform all their colleagues through email. Which of the below mentioned AWS services helps achieve this goal?

Question10: A web application is using Amazon Kinesis Streams for clickstream data that may not be consumed for up to
12 hours.
How can the Developer implement encryption at rest for data within the Kinesis Streams?

Question11: An organization has created 10 IAM users. The organization wants those users to work independently and access AWS. Which of the below mentioned options is not a possible solution?

Question12: A Developer created a new AWS account and must create a scalable AWS Lambda function that meets the following requirements for concurrent execution:
Average execution time of 100 seconds
50 requests per second
Which step must be taken prior to deployment to prevent errors?

Question13: You are providing AWS consulting services for a company developing a new mobile application that will be leveraging Amazon SNS Mobile Push for push notifications. In order to send direct notification messages to individual devices each device registration identifier or token needs to be registered with SNS; however the developers are not sure of the best way to do this.
You advise them to:

Question14: If a message is retrieved from a queue in Amazon SQS, how long is the message inaccessible to other users by default?

Question15: A user is trying to understand AWS SNS. To which of the below mentioned end points is SNS unable to send a notification?

Question16: A developer wants to modify the following AWS Cloud Formation template to embed another CloudFormation stack:

Which syntax should the developer add to the blank line of the CloudFormation template to meet this requirement?

Question17: A meteorological system monitors 600 temperature gauges, obtaining temperature samples every minute and saving each sample to a DynamoDB table. Each sample involves writing 1K of data and the writes are evenly distributed over time.
How much write throughput is required for the target table?

Question18: A website's page load times are gradually increasing as more users access the system at the same time.
Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data.
Which caching strategy will address this situation MOST efficiently?

Question19: An application ingests a large number of small messages and stores them in a database. The application uses AWS Lambda. A Development team is making change to the application's processing logic. In testing, it is taking more than 15 minutes to process each message. The team is concerned the current backend may time out.
Which changes should be made to the backend system to ensure each message is processed in the MOST scalable way?

Question20: In AWS Elastic Beanstalk, if the application returns any response other than 200 ,OK or there is no response within the configured InactivityTimeout period, __________________.

Question21: A developer has written a serverless application and wants to deploy it to AWS Lambda to leverage the function's multi-threaded execution to improve performance. Which action should the developer take to achieve these requirements?

Question22: A developer is building an application that processes a stream of user-supplied data The data stream must be consumed by multiple Amazon EC2 based processing applications in parallel and in real time. Each processor must be able to resume without losing data if there is a service interruption. The Application Architect plans to add other processors in the near future, and wants to minimize the amount of data duplication involved.
Which solution will satisfy these requirements?

Question23: A company needs to secure its existing website running behind an Elastic Load Balancer. The website's Amazon EC2 instances are CPU-constrained.
What should be done to secure the website while not increasing the CPU load on the EC2 web servers? (Select TWO.)

Question24: A company wants to containerize an existing three-tier web application and deploy it to Amazon ECS Fargate. The application is using session data to keep track of user activities. Which approach would provide the BEST user experience?

Question25: A static website is hosted in an Amazon S3 bucket. Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket. These images are not displayed when users browse the site.
What is the possible cause for the issue?

Question26: A company has an internal website that gives users the ability to access contract data that is stored in an Amazon RDS DB instance The number of contracts has increased, and several users have reported slow retrieval of the contract data.
The company wants to set up a cache to improve the latency A developer must create a solution that ensures data resiliency. The data must be encrypted and must be partitioned by department Which solution will meet these requirements?

Question27: How can software determine the public and private IP addresses of the Amazon EC2 instance that it is running on?

Question28: An application will ingest data at a very high throughput from many sources and must store the data in an Amazon S3 bucket. Which service would BEST accomplish this task?

Question29: A company is launching a poling application. The application will store the results of each pool an Amazon DynamoDB table. Management wants to remove pool data after a few data and store an archive of those records in Amazon S3.
Which approach would allow the application to archive each poll's data while keeping complexity to a MINIMUM?

Question30: A user is launching an AWS RDS instance with MySQL. The user wants to enable the Multi AZ feature. Which of the below mentioned parameters will not be allowed to configure by RDS?

Question31: A developer is using Amazon DynamoDB to store application data. The developer wants to further improve application performance by reducing response times for read and write operations.
Which DynamoDB feature should be used to meet these requirements?

Question32: A company needs a version control system for collaborative software development. Features of the system must include the following:
* Support for batches of changes across multiple files
* Parallel branching
* Version tracking
Which AWS service will meet these requirements?

Question33: A company needs to secure its existing website running behind an Elastic Load Balancer. The website's Amazon EC2 instances are CPU-constrained.
What should be done to secure the website while not increasing the CPU load on the EC2 web servers?
(Choose two.)

Question34: A developer is building an application integrating an Amazon API Gateway with an AWS Lambda function.
When calling the API, the developer receives the following error. Wed Nov 03 01:13:00 UTC 2017 : Method completed with status: 502 What should the developer do to resolve the error?

Question35: An application is running on a cluster of Amazon EC2 instance. While trying to read objects stored within a single Amazon S3 bucket that are encrypted with server-side encryption with AWS KMS managed keys (SSE-KMS), the application receives the following error:
Service : AWSKMS: Status Code: 400: Code : ThrottlingException
Which combination of steps should be taken to prevent this failure? (Select TWO.)

Question36: A Developer has implemented a Lambda function that needs to add new customers to an RDS database that is expected to run hundreds of times per hour. The Lambda function is configured to use 512MB of RAM and is based on the following pseudo code:

After testing the Lambda function, the Developer notices that the Lambda execution time is much longer than expected. What should the Developer do to improve performance?

Question37: An application runs on multiple EC2 instances behind an ELB.
Where is the session data best written so that it can be served reliably across multiple requests?

Question38: A developer supports an application that accesses data in an Amazon DynamoDB table One of the item attributes is expirationDate In the timestamp format. The application uses this attribute to find items archive them and remove them from the table based on the timestamp value The application will be decommissioned soon, and the developer must find another way to implement this functionality. The developer needs a solution that will require the least amount of code to write.
Which solution will meet these requirements?

Question39: A user has not enabled versioning on an S3 bucket. What will be the version ID of the object inside that bucket?

Question40: An account owner has created an IAM user with the name pass4test. The account owner wants to give EC2 access of only the US West region to that IAM user. How can the owner configure this?

Question41: A company's fleet of Amazon EC2 instances receives data from millions of users through an API. The servers batch the data, add an object for each user, and upload the objects to an S3 bucket to ensure high access rates The object attributes are Customer ID, Server ID, TS-Server (TimeStamp and Server ID) the size of the object, and a timestamp A developer wants to find all the objects for a given user collected during a specified time range
After creating an S3 object created event, how can the developer achieve this requirement^

Question42: A Developer has implemented a Lambda function that needs to add new customers to an RDS database that is expected to run hundreds of times per hour. The Lambda function is configured to use 512MB of RAM and is based on the following pseudo code:

After testing the Lambda function, the Developer notices that the Lambda execution time is much longer than expected. What should the Developer do to improve performance?

Question43: A Developer is writing a mobile application that allows users to view images from an S3 bucket. The users must be able to log in with their Amazon login, as well as Facebook and/or Google accounts.
How can the Developer provide this authentication functionality?

Question44: A developer is working on a Python application that runs on Amazon EC2 instances. The developer wants to enable tracing of application requests to debug performance issues in the code.
Which combination of actions should the developer take to achieve this goal? (Select TWO.)

Question45: A company is using AWS CodeBuild to compile a website from source code stored in AWS CodeCommit. A recent change to the source code has resulted in the CodeBuild project being unable to successfully compile the website.
How should the Developer identify the cause of the failures?

Question46: A startup s photo-sharing site is deployed in a VPC. An ELB distributes web traffic across two subnets. ELB session stickiness is configured to use the AWS-generated session cookie, with a session TTL of 5 minutes.
The webserver Auto Scaling Group is configured as: min-size=4, max-size=4.
The startups preparing for a public launch, by running load-testing software installed on a single EC2 instance running in us-west-2a. After 60 minutes of load-testing, the webserver logs show:
Which recommendations can help ensure load-testing HTTP requests are evenly distributed across the four webservers? Choose 2 answers

Question47: Which statements about DynamoDB are true? Choose 2 answers

Question48: A user is creating a snapshot of an EBS volume. Which of the below statements is incorrect in relation to the creation of an EBS snapshot?

Question49: An organization launched an IPv6-only web portal to support IPv6-native mobile clients. Front-end
instances launch in an Amazon VPC associated with an appropriate IPv6 CIDR. The VPC IPv4 CIDR is
fully utilized. A single subnet exists in each of two Availability Zones with appropriately configured IPv6
CIDR associations. Auto Scaling is properly configured, and no Elastic Load Balancing is used.
Customers say the service is unavailable during peak load times. The network engineer attempts to launch
an instance manually and receives the following message: "There are not enough free addresses in
subnet 'subnet-12345677' to satisfy the requested number of instances."
What action will resolve the availability problem?

Question50: A developer is building a WebSocket API using Amazon API Gateway. The payload sent to this API is JSON that includes an action key This key can have three different values create, update, and remove The developer must integrate with different routes based on the value of the action key of the incoming JSON payload How can the developer accomplish this task with the LEAST amount of configuration?

Question51: What is the maximum time messages can be stored in SQS?

Question52: A Developer must deploy a new AWS Lambda function using an AWS CloudFormation template.
Which procedures will deploy a Lambda function? (Select TWO.)

Question53: A company is building a scalable data management solution by using AWS services to improve the speed and agility of development. The solution will ingest large volumes of data from various sources and will process this data through multiple business rules and transformations.
The solution requires business rules to run in sequence and to handle reprocessing of data if errors occur when the business rules run. The company needs the solution to be scalable and to require the least possible maintenance.
Which AWS service should the company use to manage and automate the orchestration of the data flows to meet these requirements?

Question54: A user is planning to host data with RDS. Which of the below mentioned databases is not supported by RDS?

Question55: A developer converted an existing program to an AWS Lambda function in the console. The program runs properly on a local laptop, but shows an "Unable to import module" error when tested in the Lambda console.
Which of the following can fix the error?

Question56: An AWS Lambda function accesses two Amazon DynamoDB tables. A developer wants to improve the performance of the Lambda function by identifying bottlenecks in the function. How can the developer inspect the timing of the DynamoDB API calls?

Question57: A company is launching a poling application. The application will store the results of each pool an Amazon DynamoDB table.
Management wants to remove pool data after a few data and store an archive of those records in Amazon S3.
Which approach would allow the application to archive each poll's data while keeping complexity to a MINIMUM?

Question58: An EC2 instance has one additional EBS volume attached to it. How can a user attach the same volume
to another running instance in the same AZ?

Question59: A Development team has pushed out 10 applications running on several Amazon EC2 instances. The Operations team is asking for a graphical representation of one key performance metric for each application.
These metrics should be available on one screen for easy monitoring.
Which steps should the Developer take to accomplish this using Amazon CloudWatch?