CLF-C02 practice questions: Cloud Technology and Services

D is correct. Task Statement 3.3 states that candidates should recognize that auto scaling provides elasticity. The Amazon EC2 Auto Scaling user guide states that 'You can specify the minimum number of instances in each Auto Scaling group,' 'the maximum number,' and that 'If you specify scaling policies, then Amazon EC2 Auto Scaling can launch or terminate instances as demand on your application increases or decreases.' It adds that 'Using auto scaling allows you to maintain application availability and reduce costs by adding capacity to handle peak loads and removing capacity when demand is lower.'
↗ AWS CLF-C02 Exam Guide — Domain 3: Cloud Technology and Services

D is correct. Task Statement 3.6 asks candidates to identify file services. The Amazon EFS user guide states that it 'provides serverless, fully elastic file storage so that you can share file data without provisioning or managing storage capacity and performance' and that it is 'built to scale on demand to petabytes without disrupting applications, growing and shrinking automatically as you add and remove files'. The Amazon EBS user guide states that Multi-Attach lets you attach a single Provisioned IOPS SSD volume 'to multiple instances that are in the same Availability Zone'. Amazon FSx for Windows File Server is described as built on Microsoft Windows Server with 'native support for Windows file system features and for the industry-standard Server Message Block (SMB) protocol', and the S3 File Gateway guide describes a gateway deployed 'into your on-premises environment'.
↗ AWS CLF-C02 Exam Guide — Domain 3: Cloud Technology and Services

B is correct. Task Statement 3.1 asks candidates to decide between programmatic access, the console and infrastructure as code. AWS service guides describe the AWS CLI as 'a unified tool that you can use to interact with' a service 'from the command line,' and state that the command line tools 'are also useful if you want to build scripts that perform tasks.' The same guides describe the AWS Management Console as 'a browser-based interface,' and the AWS Systems Manager user guide describes Systems Manager as a way to 'centrally view, manage, and operate nodes at scale.'
↗ AWS CLF-C02 Exam Guide — Domain 3: Cloud Technology and Services

B is correct. Task Statement 3.4 asks candidates to identify memory-based databases, naming Amazon ElastiCache. The Amazon ElastiCache user guide states that it 'is a web service that makes it easy to set up, manage, and scale a distributed in-memory data store or cache environment in the cloud. It provides a high-performance, scalable, and cost-effective caching solution. At the same time, it helps remove the complexity associated with deploying and managing a distributed cache environment.' The distractors are the relational, NoSQL and object options a candidate may reach for instead.
↗ AWS CLF-C02 Exam Guide — Domain 3: Cloud Technology and Services

D is correct. Task Statement 3.8 asks candidates to identify the tools to develop, deploy and troubleshoot applications, and the CLF-C02 in-scope services list names AWS X-Ray under Developer Tools. The AWS X-Ray developer guide states that X-Ray 'is a service that collects data about requests that your application serves, and provides tools that you can use to view, filter, and gain insights into that data', that 'For any traced request to your application, you can see detailed information not only about the request and response, but also about calls that your application makes to downstream AWS resources, microservices, databases, and web APIs', and that you should 'Use the trace map to identify bottlenecks, latency spikes, and other issues'.
↗ AWS CLF-C02 Exam Guide — Domain 3: Cloud Technology and Services