AWS Serverless Microservices with Patterns and Best Practices - Amazon SQS Queue Types - Standard Queues and FIFO Queues

The video tutorial explains Amazon SQS queue types: standard and FIFO. Standard queues offer unlimited throughput, best-effort ordering, and at least once delivery, but may deliver duplicate messages. FIFO queues ensure first-in-first-out ordering and exactly-once delivery, with limited throughput. The tutorial compares these queues based on message ordering, delivery guarantees, and throughput, highlighting their use cases. Standard queues are suitable for applications that can handle duplicates and out-of-order messages, while FIFO queues are ideal for scenarios requiring strict message order and no duplicates.

What is the default queue type offered by Amazon SQS?

• Priority queue

• Batch queue

• Standard queue

• FIFO queue

How does a FIFO queue ensure message delivery?

• Best-effort ordering

• Random ordering

• At least once delivery

• First in, first out delivery

Which queue type guarantees at least once delivery but may deliver duplicates?

• Batch queue

• Priority queue

• Standard queue

• FIFO queue

What is the maximum throughput of a FIFO queue without batching?

• 500 transactions per second

• 1000 transactions per second

• 300 transactions per second

• Unlimited transactions per second

When should you use a FIFO queue over a Standard queue?

• When duplicates are acceptable

• When message order is not important

• When message order must be preserved

• When unlimited throughput is required