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

Increasing the CPU of a single pod

Answer

Moving pods to faster nodes

Answer

Encrypting pod storage

Question 2

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

Accepted Answer

Frequently merged into a single main branch in small increments

Answer

Held in long-lived feature branches for months

Answer

Only merged during quarterly releases

Answer

Never merged, kept as forks

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

Identifying who to fire

Answer

Avoiding documentation

Answer

Speeding up the next deployment

Question 4

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

Accepted Answer

Prometheus

Answer

Git

Answer

Jira

Answer

Nginx

Question 5

What does a 'rolling update' deployment do?

Accepted Answer

Gradually replaces old instances with new ones to avoid downtime

Answer

Deletes all instances then recreates them

Answer

Updates only the database schema

Answer

Reverts to the previous version

Question 6

In CI/CD, why is 'pipeline as code' preferred over manually configured jobs?

Accepted Answer

It is version controlled, reviewable, and reproducible

Answer

It runs without any compute resources

Answer

It removes the need for tests

Answer

It hides the configuration from developers

Question 7

What is the function of a 'reverse proxy' in a typical deployment?

Accepted Answer

Routing client requests to backend services and load balancing

Answer

Compiling application code

Answer

Storing container images

Answer

Running database migrations