DevOps DevOps 4

Question 1

What is the purpose of 'horizontal pod autoscaling' in Kubernetes?

Accepted Answer

Adding or removing pod replicas based on observed load

Answer

Horizontal pod autoscaling adjusts the number of pod replicas to match demand.

Question 2

In trunk-based development, how are changes typically integrated?

Accepted Answer

Frequently merged into a single main branch in small increments

Answer

Trunk-based development emphasizes small, frequent merges into one main branch to reduce integration pain.

Question 3

What is the main goal of a 'post-incident review' (postmortem)?

Accepted Answer

Learning from failures without blaming individuals to prevent recurrence

Answer

A blameless postmortem focuses on systemic learning to prevent the same incident from recurring.

Question 4

Which tool is commonly used for collecting and querying time-series metrics?

Accepted Answer

Prometheus

Answer

Prometheus is a widely used open-source system for collecting and querying time-series metrics.

Question 5

What does a 'rolling update' deployment do?

Accepted Answer

Gradually replaces old instances with new ones to avoid downtime

Answer

A rolling update incrementally replaces old pods with new ones to keep the service available.

DevOps Practice Test