Instance states (running, stopped, terminated) in AWS - Cheat Sheet & Quick Revision

Recall & Review

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What does the running state mean for an AWS EC2 instance?

The instance is powered on and ready to use. It can accept network traffic and run applications.

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What happens when an EC2 instance is in the stopped state?

The instance is powered off but still exists. You are not charged for instance usage, but storage costs apply. You can start it again later.

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What does the terminated state mean for an EC2 instance?

The instance is permanently deleted. You cannot start it again. All associated resources like storage may be deleted depending on settings.

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Can you restart an EC2 instance that is terminated?

No, once an instance is terminated, it is permanently deleted and cannot be restarted.

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What is the difference between stopping and terminating an EC2 instance?

Stopping powers off the instance but keeps it for later use. Terminating deletes the instance permanently.

What state is an EC2 instance in when it is powered on and ready to use?

A Running

B Stopped

C Terminated

D Pending

The running state means the instance is powered on and ready to accept traffic.

Which instance state means the instance is permanently deleted?

A Stopped

B Running

C Terminated

D Pending

Terminated means the instance is deleted and cannot be restarted.

If you want to pause an instance but keep it for later use, which state should you put it in?

A Stopped

B Running

C Terminated

D Shutting-down

Stopped means the instance is powered off but can be started again later.

Are you charged for instance usage when an EC2 instance is stopped?

A Yes, full charges apply

B Charges depend on instance type

C No charges at all

D No, you are not charged for instance usage but storage costs apply

When stopped, you don't pay for instance runtime but still pay for storage.

Can you restart an EC2 instance after it has been terminated?

A Yes, anytime

B No, terminated instances cannot be restarted

C Only within 24 hours

D Only if backed up

Terminated instances are permanently deleted and cannot be restarted.

Explain the differences between the running, stopped, and terminated states of an EC2 instance.

Think about what happens to the instance and your ability to use it in each state.

What are the cost implications of stopping versus terminating an EC2 instance?

Consider what you pay for when the instance is stopped versus terminated.