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NEW QUESTION 47
A company is managing a NoSQL database on-premises to host a critical component of an application, which is starting to have scaling issues. The company wants to migrate the application to Amazon DynamoDB with the following considerations:
* Optimize frequent queries
* Reduce read latencies
* Plan for frequent queries on certain key attributes of the table
Which solution would help achieve these objectives?

  • A. Create DynamoDB global tables to speed up query responses Use a scan to fetch data from the table.
  • B. Create global secondary indexes on keys that are frequently queried Add the necessary attributes into the indexes.
  • C. Create an AWS Auto Scaling policy for the DynamoDB table
  • D. Create local secondary indexes on keys that are frequently queried DynamoDB will fetch needed attributes from the table .

Answer: B

 

NEW QUESTION 48
A developer is building a new application that uses an Amazon DynamoDB table. The specification states that all items that are older than 48 hours must be removed Which solution will meet this requirement?

  • A. Create a new attribute that has the Number data type Add a local secondary index (LSI) for this attribute and enable TTL with an expiration of 48 hours In the application code, set the value of this attribute to the current timestamp for each new item that is being inserted.
  • B. Create a new attribute that has the Number data type Enable TTL on the DynamoDB table for this attribute in the application code set the value of this attribute to the current timestamp plus 48 hours for each new item that is being inserted
  • C. Create a new attribute that has the String data type Enable TTL on the DynamoDB table for this attribute In the application code set the value of this attribute to the current timestamp plus 48 hours for each new item that is being inserted
  • D. Create a new attribute that has the String data type Add a local secondary index (LSI) for this attribute and enable TTL with an expiration of 48 hours In the application code, set the value of this attribute to the current timestamp for each new item that is being inserted.

Answer: B

 

NEW QUESTION 49
A company has an AWS Lambda function that runs hourly, reads log files that are stored in Amazon S3, and forwards alerts to Amazon Simple Notification Service (Amazon SNS) topics based on content A developer wants to add a custom metric to the Lambda function to track the number of alerts of each type for each run The developer needs to log this information in Amazon CloudWatch in a metric that is named Lambda/AlertCounts How should the developer modify the Lambda function to meet this requirement with the LEAST operational overhead''

  • A. Add a call to the PutMetncAlarm API operation Pass an array of alerts in the metrics member with the namespace of "Lambda/AlertCounts"
  • B. Add a call to the PutDashboard API operation Pass an array of alerts in the metrics member with the namespace of "Lambda/AlertCounts"
  • C. Add a call to the PutMetricData API operation Pass an array for alerts and the number of occurrences in the Values and Counts fields with a namespace of "Lambda/AlertCounts"
  • D. Add a print statement to standard out for each alert and the number of occurrences

Answer: A

 

NEW QUESTION 50
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