AWS Certified DevOps Engineer Professional Exam Questions 2019

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Amazon AWS Certified DevOps Engineer - Professional Exam

Questions & Answers


Question: 1

What method should I use to author automation if I want to wait for a CloudFormation stack to finish completing in a script?

A. Event subscription using SQS.

B. Event subscription using SNS.

C. Poll using <code>ListStacks</code> / <code>list-stacks</code>.

D. Poll using <code>GetStackStatus</code> / <code>get-stack-status</code>.

Answer: C

Question: 2

Your application consists of 10% writes and 90% reads. You currently service all requests through a Route53 Alias Record directed towards an AWS ELB, which sits in front of an EC2 Auto Scaling Group. Your system is getting very expensive when there are large traffic spikes during certain news events, during which many more people request to read similar data all at the same time. What is the simplest and cheapest way to reduce costs and scale with spikes like this?

A. Create an S3 bucket and asynchronously replicate common requests responses into S3 objects. When a request comes in for a precomputed response, redirect to AWS S3.

B. Create another ELB and Auto Scaling Group layer mounted on top of the other system, adding a tier to the system. Serve most read requests out of the top layer.

C. Create a CloudFront Distribution and direct Route53 to the Distribution. Use the ELB as an Origin and specify Cache Behaviours to proxy cache requests which can be served late.

D. Create a Memcached cluster in AWS ElastiCache. Create cache logic to serve requests which can be served late from the in-memory cache for increased performance.

Answer: C

Question: 3

You need to perform ad-hoc business analytics queries on well-structured data. Data comes in constantly at a high velocity. Your business intelligence team can understand SQL. What AWS service(s) should you look to first?

A. Kinesis Firehose + RDS

B. Kinesis Firehose + RedShift

C. EMR using Hive

D. EMR running Apache Spark

Answer: B

Question: 4

You are building a game high score table in DynamoDB. You will store each user's highest score for each game, with many games, all of which have relatively similar usage levels and numbers of players. You need to be able to look up the highest score for any game. What's the best DynamoDB key structure?

A. HighestScore as the hash / only key.

B. GameID as the hash key, HighestScore as the range key.

C. GameID as the hash / only key.

D. GameID as the range / only key.

Answer: B

Question: 5

What is server immutability?

A. Not updating a server after creation.

B. The ability to change server counts.

C. Updating a server after creation.

D. The inability to change server counts.

Answer: A

Question: 6

You run a clustered NoSQL database on AWS EC2 using AWS EBS. You need to reduce latency for database response times. Performance is the most important concern, not availability. You did not perform the initial setup, someone without much AWS knowledge did, so you are not sure if they configured everything optimally. Which of the following is NOT likely to be an issue contributing to increased latency?

A. The EC2 instances are not EBS Optimized.

B. The database and requesting system are both in the wrong Availability Zone.

C. The EBS Volumes are not using PIOPS.

D. The database is not running in a placement group.

Answer: B

Question: 7

Fill the blanks: __________ helps us track AWS API calls and transitions, _________ helps to understand what resources we have now, and ________ allows auditing credentials and logins.

A. AWS Config, CloudTrail, IAM Credential Reports

B. CloudTrail, IAM Credential Reports, AWS Config

C. CloudTrail, AWS Config, IAM Credential Reports

D. AWS Config, IAM Credential Reports, CloudTrail

Answer: C

Question: 8

You are creating an application which stores extremely sensitive financial information. All information in the system must be encrypted at rest and in transit. Which of these is a violation of this policy?

A. ELB SSL termination.

B. ELB Using Proxy Protocol v1.

C. CloudFront Viewer Protocol Policy set to HTTPS redirection.

D. Telling S3 to use AES256 on the server-side.

Answer: A

Question: 9

You need to scale an RDS deployment. You are operating at 10% writes and 90% reads, based on your logging. How best can you scale this in a simple way?

A. Create a second master RDS instance and peer the RDS groups.

B. Cache all the database responses on the read side with CloudFront.

C. Create read replicas for RDS since the load is mostly reads.

D. Create a Multi-AZ RDS installs and route read traffic to standby.

Answer: C

Question: 10

When thinking of AWS Elastic Beanstalk, the 'Swap Environment URLs' feature most directly aids in what?

A. Immutable Rolling Deployments

B. Mutable Rolling Deployments

C. Canary Deployments

D. Blue-Green Deployments

Answer: D