DCA Data Analysis & Reporting 4

Question 1

Which open-source tool is commonly used to collect per-container resource metrics and expose them to Prometheus in a Docker environment?

Accepted Answer

cAdvisor

Answer

cAdvisor (Container Advisor) collects per-container CPU, memory, and network metrics and exposes a Prometheus endpoint.

Question 2

You run `docker logs --since 2h api`. What does this output?

Accepted Answer

Logs generated in the past 2 hours of wall-clock time

Answer

`--since 2h` filters logs to those produced within the last 2 hours of real (wall-clock) time.

Question 3

Which `docker events` filter would show only container die events?

Accepted Answer

--filter type=container --filter event=die

Answer

Combining `--filter type=container` and `--filter event=die` precisely targets container die events.

Question 4

What does the `PIDS` column in `docker stats` output represent?

Accepted Answer

Number of processes or threads running inside the container

Answer

The `PIDS` column shows how many processes or threads are currently running inside that container.

Question 5

When configuring the `awslogs` log driver, which option specifies the CloudWatch log group name?

Accepted Answer

awslogs-group

Answer

The `awslogs-group` option sets the CloudWatch Logs group where container logs are sent.

DCA - Docker Certified Associate Exam Practice Test