Mỗi chủ đề học bạn hãy làm khoảng 20 câu quiz. Làm và tự có lý giải riêng của mình để hiểu bản chất nhé. Sau đó khi ôn tập thì làm một số đề thi thử xáo trộn các chủ đề với nhau và giới hạn thời gian làm bài. Chúc mọi người thi tốt nhé !
Dưới đây là một số câu quiz luyện thi chứng chỉ AWS chủ đề ElastiCache
Mọi người tự làm trước, đáp án và video giải thích ở cuối bài nha.
1. A Developer is migrating an on-premises web application to the AWS Cloud. The application currently runs on a 32-processor server and stores session state in memory. On Friday afternoons the server runs at 75% CPU utilization, but only about 5% CPU utilization at other times.
How should the Developer change to code to better take advantage of running in the cloud?
A. Compress the session state data in memory.
B. Store session state on EC2 instance Store.
C. Encrypt the session state data in memory.
D. Store session state in an ElastiCache cluster.
2. A company wants to add geospatial capabilities to the cache layer, along with query capabilities and an ability to horizontally scale. The company uses Amazon RDS as the database tier.
Which solution is optimal for this use-case?
A. Leverage the capabilities offered by ElastiCache for Redis with cluster mode enabled
B. Leverage the capabilities offered by ElastiCache for Redis with cluster mode disabled
C. Use CloudFront caching to cater to demands of increasing workloads
D. Migrate to Amazon DynamoDB to utilize the automatically integrated DynamoDB Accelerator (DAX) along with query capability features
3. An IT company uses a blue/green deployment policy to provision new Amazon EC2 instances in an Auto Scaling group behind a new Application Load Balancer for each new application version. The current set up requires the users to log in after every new deployment.
As a Developer Associate, what advice would you give to the company for resolving this issue?
A. Use ElastiCache to maintain user sessions
B. Use rolling updates instead of a blue/green deployment
C. Enable sticky sessions in the Application Load Balancer
D. Use multicast to replicate session information
4. The development team at a social media company is considering using Amazon ElastiCache to boost the performance of their existing databases.
As a Developer Associate, which of the following use-cases would you recommend as the BEST fit for ElastiCache? (Select two)
A. Use ElastiCache to improve latency and throughput for read-heavy application workloads
B. Use ElastiCache to improve latency and throughput for write-heavy application workloads
C. Use ElastiCache to improve performance of Extract-Transform-Load (ETL) workloads
D. Use ElastiCache to improve performance of compute-intensive workloads
E. Use ElastiCache to run highly complex JOIN queries
5. An application is currently in production that makes calls to an AWS RDS Instance. The database has recently been facing performance problems. It has been noticed that some static read queries are putting a strain on the database. Which of the following can be used to resolve the issue?
A. Place a CloudFront distribution in front of the database.
B. Enable Multi-AZ for the database.
C. Place an SQS queue in front of the database.
D. Place an ElastiCache in front of the database.
6. A development team is considering Amazon ElastiCache for Redis as its in-memory caching solution for its relational database.
Which of the following options are correct while configuring ElastiCache? (Select two)
A. All the nodes in a Redis cluster must reside in the same region
B. You can scale write capacity for Redis by adding replica nodes
C. While using Redis with cluster mode enabled, you cannot manually promote any of the replica nodes to primary
D. While using Redis with cluster mode enabled, asynchronous replication mechanisms are used to keep the read replicas synchronized with the primary. If cluster mode is disabled, the replication mechanism is done synchronously
E. If you have no replicas and a node fails, you experience no loss of data when using Redis with cluster mode enabled
Đáp án: 1D - 2A - 3A - 4A+D - 5D - 6A+C
Video giải thích trích từ record buổi học ElastiCache mọi người xem tại đây nhé : AWS: Quiz ElastiCache có giải đáp (P1) | Learn AWS the Hard Way | Techmaster
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