AWS Certified Developer Associate Practice Test 5

Correct answer - "Use parallel scans" : In order to give you the ability to retrieve data from your DynamoDB tables more rapidly, AWS introduced a new parallel scan model. To make use of this feature, you will need to run multiple worker threads or processes in parallel. Each worker will be able to scan a separate partition of a table concurrently with the other workers.

"Use a ProjectionExpression" - A projection expression is a string that identifies the attributes you want. To retrieve a single attribute, specify its name. For multiple attributes, the names must be comma-separated

"Use a FilterExpression" - The ProjectionExpression property specifies the attributes to be returned

"Use a Query" - For faster response times, design your tables and indexes so that your applications can use Query instead of Scan. Alternatively, you can design your application to use Scan operations in a way that minimizes the impact on your request. Scans are limited to one partition at a time and parallel scans are the solution to that

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