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Associate Certified Developer - Associate Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Associate Certified Developer - Associate flashcards as text

  1. A developer needs to ensure messages in an SQS queue are processed exactly once. Which SQS feature should they use?

    Answer: FIFO Queue with content-based deduplication

    FIFO queues with content-based deduplication use a SHA-256 hash of the message body to prevent duplicate processing.

  2. An application uses AWS Cognito for authentication. After a user signs in, which token is used to authorize API Gateway calls?

    Answer: Access token

    The access token contains scopes and groups and is used to authorize API calls, while the ID token contains user identity claims.

  3. A Lambda function must read configuration values that change infrequently. What is the MOST cost-effective approach?

    Answer: Store values in environment variables

    Environment variables are loaded at container initialization, avoiding per-invocation API calls and associated latency/cost.

  4. A developer is using the AWS SDK and receives a ThrottlingException. What retry strategy should be implemented?

    Answer: Retry with exponential backoff and jitter

    Exponential backoff with jitter reduces contention by spacing retries and randomizing intervals to avoid synchronized retry storms.

  5. Which DynamoDB feature allows a developer to read data with the lowest latency, accepting potentially stale data?

    Answer: Eventually consistent reads

    Eventually consistent reads use half the read capacity units of strongly consistent reads and may return slightly stale data.

  6. A developer wants to test a new Lambda function version without affecting existing traffic. Which approach accomplishes this?

    Answer: Use Lambda aliases with traffic shifting

    Lambda aliases support weighted traffic routing, allowing a percentage of traffic to be directed to the new version for canary testing.

  7. An S3 bucket policy must allow a specific IAM role to perform GetObject operations. Which element in the policy specifies the allowed action?

    Answer: Action

    The Action element specifies which S3 API operations are permitted, such as s3:GetObject.