Standard vs FIFO queues in AWS - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Message ordering in AWS SQS queues

Which type of AWS SQS queue guarantees that messages are processed in the exact order they are sent?

A Standard queue

B FIFO queue

C Both Standard and FIFO queues

D Neither Standard nor FIFO queues

💡 Hint

Think about which queue type is designed for strict ordering.

FIFO queues guarantee that messages are processed in the exact order they are sent. Standard queues do not guarantee order.

❓ service_behavior

intermediate

Message duplication behavior in AWS SQS queues

Which AWS SQS queue type may deliver duplicate messages under high load?

A Standard queue

B FIFO queue

C Both FIFO and Standard queues

D Neither FIFO nor Standard queues

💡 Hint

Consider which queue type prioritizes throughput over exactly-once delivery.

Standard queues may deliver duplicate messages, especially under high load. FIFO queues provide exactly-once processing.

❓ Configuration

advanced

Correct AWS CLI command to create a FIFO queue

Which AWS CLI command correctly creates a FIFO queue named myqueue.fifo with content-based deduplication enabled?

A aws sqs create-queue --queue-name myqueue.fifo --attributes FifoQueue=false,ContentBasedDeduplication=true

B aws sqs create-queue --queue-name myqueue --attributes FifoQueue=true,ContentBasedDeduplication=true

C aws sqs create-queue --queue-name myqueue.fifo --attributes FifoQueue=true,ContentBasedDeduplication=true

D aws sqs create-queue --queue-name myqueue.fifo --attributes ContentBasedDeduplication=true

💡 Hint

Remember FIFO queues must have names ending with .fifo and the FifoQueue attribute set to true.

Option C correctly sets the queue name ending with .fifo and enables FIFO and content-based deduplication attributes.

❓ Architecture

advanced

Choosing queue type for high throughput and unordered processing

You need to design a system that processes millions of messages per second without strict ordering requirements. Which AWS SQS queue type should you choose?

A FIFO queue

B Use SNS instead of SQS

C Use both FIFO and Standard queues simultaneously

D Standard queue

💡 Hint

Think about which queue type supports the highest throughput without ordering constraints.

Standard queues support nearly unlimited throughput and do not guarantee ordering, making them suitable for high-volume unordered processing.

❓ security

expert

Ensuring exactly-once processing with AWS SQS FIFO queues

Which configuration is essential to ensure exactly-once message processing in an AWS SQS FIFO queue?

A Enable content-based deduplication and use message group IDs

B Use standard queue with long polling enabled

C Disable deduplication and use multiple message groups

D Use FIFO queue without message group IDs

💡 Hint

Consider how deduplication and grouping affect message processing guarantees.

Content-based deduplication prevents duplicate messages, and message group IDs ensure ordered processing within groups, enabling exactly-once processing.