Memory limits and reservations in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a memory limit of 500MB for a Docker container.

Docker

docker run --memory=[1] myapp

Drag options to blanks, or click blank then click option'

A500MB

B500mb

C500m

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'MB' which Docker does not recognize.

Omitting the suffix, which defaults to bytes and is too small.

The correct flag value is 500m which means 500 megabytes. Docker expects memory limits in bytes or with suffixes like 'm' for megabytes.

2fill in blank

medium

Complete the code to reserve 200MB of memory for a Docker container.

Docker

docker run --memory-reservation=[1] myapp

Drag options to blanks, or click blank then click option'

A200m

B200

C200mb

D200MB

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'MB' which is invalid.

Not specifying any suffix, which defaults to bytes.

The memory reservation flag expects a value like 200m for 200 megabytes.

3fill in blank

hard

Fix the error in the command to limit memory to 1GB.

Docker

docker run --memory=[1] myapp

Drag options to blanks, or click blank then click option'

A1g

B1G

C1GB

D1000m

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'GB' or 'G' which causes errors.

Using '1000m' which is 1000 megabytes, not exactly 1 gigabyte.

The correct suffix for gigabytes is lowercase 'g'. So 1g means 1 gigabyte.

4fill in blank

hard

Fill both blanks to set a memory limit of 750MB and a reservation of 500MB.

Docker

docker run --memory=[1] --memory-reservation=[2] myapp

Drag options to blanks, or click blank then click option'

A750m

B500m

C750MB

D500MB

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'MB' which Docker does not accept.

Mixing suffixes or omitting them.

Memory limits and reservations require lowercase suffixes like 'm' for megabytes. So 750m and 500m are correct.

5fill in blank

hard

Fill all three blanks to set a memory limit of 2GB, a reservation of 1GB, and swap memory limit of 3GB.

Docker

docker run --memory=[1] --memory-reservation=[2] --memory-swap=[3] myapp

Drag options to blanks, or click blank then click option'

A2g

B1g

C3g

D3000m

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'G' or 'GB' suffixes.

Using megabytes instead of gigabytes for large values.

Use lowercase 'g' suffix for gigabytes. So 2g, 1g, and 3g are correct for memory limits, reservation, and swap respectively.