DevOps DevOps 3

Question 1

What is the purpose of a 'blue-green deployment'?

Accepted Answer

Maintaining two identical environments to switch traffic with zero downtime

Answer

Blue-green deployment keeps two production environments so traffic can switch instantly with minimal downtime.

Question 2

In Docker, what is the difference between an image and a container?

Accepted Answer

An image is a static template; a container is a running instance of it

Answer

An image is the immutable blueprint, and a container is a live running instance created from it.

Question 3

Which metric is part of the DORA 'Four Key Metrics' for DevOps performance?

Accepted Answer

Deployment frequency

Answer

Deployment frequency is one of the four DORA metrics measuring software delivery performance.

Question 4

What does 'observability' primarily rely on?

Accepted Answer

Logs, metrics, and traces

Answer

Observability is built on the three pillars of logs, metrics, and traces to understand system internal state.

Question 5

In a pipeline, what is a 'gate' or 'approval step' used for?

Accepted Answer

Requiring a condition or human sign-off before promoting to the next stage

Answer

A gate pauses the pipeline until a condition is met or approval is granted before continuing.

DevOps Practice Test