CloudWatch Logs in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is AWS CloudWatch Logs used for?

AWS CloudWatch Logs is used to collect, monitor, and store log files from AWS resources and applications. It helps you track system and application behavior in real time.

beginner

What is a Log Group in CloudWatch Logs?

A Log Group is a collection of log streams that share the same retention, monitoring, and access control settings. Think of it like a folder that organizes related logs.

beginner

What is a Log Stream in CloudWatch Logs?

A Log Stream is a sequence of log events from the same source, like a single server or application instance. It’s like a timeline of logs from one source.

intermediate

How does CloudWatch Logs help with troubleshooting?

CloudWatch Logs lets you search and filter logs to find errors or unusual activity quickly. You can also set alarms to get notified when specific patterns appear in logs.

beginner

What is the purpose of retention settings in CloudWatch Logs?

Retention settings control how long logs are stored before they are deleted. This helps manage storage costs and keeps only the logs you need.

What does a CloudWatch Log Group represent?

A A dashboard for monitoring metrics

B A single log event

C A collection of log streams with shared settings

D An AWS resource like an EC2 instance

A Log Group organizes multiple log streams that share retention and access settings.

Which of the following is a Log Stream?

A A timeline of logs from one source

B A group of AWS accounts

C A metric alarm

D A storage bucket

A Log Stream is a sequence of log events from a single source.

How can CloudWatch Logs notify you about specific log events?

A By setting alarms on metric filters

B By sending logs to S3

C By creating EC2 instances

D By changing IAM roles

You can create metric filters on logs and set alarms to get notifications.

What happens when log retention period expires in CloudWatch Logs?

A Logs are encrypted

B Logs are archived to Glacier

C Logs are sent to CloudTrail

D Logs are automatically deleted

Logs are deleted after the retention period to save storage.

Which AWS service is primarily used to collect and store logs?

A S3

B CloudWatch Logs

C EC2

D Lambda

CloudWatch Logs is designed to collect and store logs from AWS resources.

Explain how CloudWatch Logs organizes and stores log data.

Think about folders and files to organize logs.

Describe how you can use CloudWatch Logs to detect and respond to errors in your application.

Consider how alerts help you act quickly.