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NEW QUESTION 47
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?

A. Create a custom alarm with a unique metric name for each application.B. Create a custom namespace with a unique metric name for each application.C. Create a custom dimension with a unique metric name for each application.D. Create a custom event with a unique metric name for each application.

Answer: B

Explanation:
Explanation
https://aws.amazon.com/premiumsupport/knowledge-center/cloudwatch-custom-metrics/

 

NEW QUESTION 48
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?

A. Use a dedicated Amazon RDS instance for caching profile data. Use a write-through caching strategy.B. Create an ElastiCache cluster to cache the user profile data. Use a write-through caching strategy.C. Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.D. Create a new Amazon EC2 Instance and run a NoSQL database on it. Cache the profile data within this database using the write-through caching strategy.

Answer: C

 

NEW QUESTION 49
How can software determine the public and private IP addresses of the Amazon EC2 instance that it is running on?

A. Query the appropriate Amazon CloudWatch metric.B. Query the local instance metadata.C. Query the local instance userdata.D. Use ipconfig or ifconfig command.

Answer: B

 

NEW QUESTION 50
An application reads data from an Amazon DynamoDB table. Several times a day, for a period of 15 seconds, the application receives multiple ProvisionedThroughputExceeded errors.
How should this exception be handled?

A. Retry the failed read requests with exponential backoff.B. Immediately retry the failed read requests.C. Use the DynamoDB "UpdateItem" API to increase the provisioned throughput capacity of the table.D. Create a new global secondary index for the table to help with the additional requests.

Answer: A

Explanation:
Reference:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.Errors.html

 

NEW QUESTION 51
A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key (user_id) and a sort key (sport_name). The table design is shown below:

(Note: Not all table attributes are shown)
A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name.
What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?

A. Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.B. Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.C. Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.D. Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results

Answer: D

Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SecondaryIndexes.html
https://docs.aws.amazon.com/zh_cn/amazondynamodb/latest/developerguide/GSI.html

 

NEW QUESTION 52
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