[Solved] Given this Python code snippet using boto3 to receive a message from... Given this Python code snippet using boto3 to receive a message from an SQS queue, what will be printed if the queue is empty? | AWS

AWS - SNS and SQS

Given this Python code snippet using boto3 to receive a message from an SQS queue, what will be printed if the queue is empty? ```python import boto3 sqs = boto3.client('sqs') response = sqs.receive_message(QueueUrl='https://sqs.region.amazonaws.com/123456789012/MyQueue') print(response.get('Messages')) ```

AA string 'No messages'

BAn empty list []

CA KeyError exception

DNone

Step-by-Step Solution

Solution:

Step 1: Understand boto3 receive_message behavior when no messages
If no messages are available, the 'Messages' key is not present in the response dictionary.
Step 2: Check what response.get('Messages') returns if key missing
The get method returns None if the key is missing, so print outputs None.
Final Answer:
None is printed because 'Messages' key is absent when queue is empty. -> Option D
Quick Check:
Empty queue receive_message = None [OK]

Quick Trick: response.get returns None if key missing [OK]

Common Mistakes:

Expecting empty list instead of None
Assuming KeyError is raised
Thinking a string message is returned

Master "SNS and SQS" in AWS

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More AWS Quizzes

Given this Python code snippet using boto3 to receive a message from an SQS queue, what will be printed if the queue is empty?

Step 1: Understand boto3 receive_message behavior when no messages

Step 2: Check what response.get('Messages') returns if key missing

Final Answer:

Quick Check:

Want More Practice?