2024 Ultimate IT Operations Interview Questions: 400+ Shell, K8s, Docker & Jenkins

2024 IT Operations Interview Question Collection

Operations professionals often face information gaps in promotions, job changes, and interviews. To bridge this, we compiled over 400 up‑to‑date interview questions covering the most demanded topics in IT operations.

Question Breakdown

108 Shell script questions

128 Kubernetes (k8s) high‑frequency questions

51 Docker questions

88 Jenkins questions

Sample Shell Script Questions

What is a shell script and is it necessary?

How to change a user’s default login shell?

Which variable types can be used in a shell script?

How to redirect both stdout and stderr to the same location?

How to nest “if” statements in a shell script?

What does the “$?” variable represent?

How to compare two numbers in a shell script?

What does the “break” command do?

What does the “continue” command do?

Explain the syntax of a “case” statement.

Explain the syntax of a “while” loop.

How to make a script executable?

What is the purpose of “#!/bin/bash”?

Explain the syntax of a “for” loop.

How to debug a shell script?

How to compare strings in a shell script?

What special variables exist in Bash?

How to test a file in a shell script?

How to write comments in a shell script?

How to read input from the terminal?

How to unset a variable?

How to perform arithmetic operations?

What is the format of a do‑while loop?

How to define a function?

How to generate a random string or number?

How to create a color‑output function?

How to batch create users?

How to check if a package is installed?

How to check service status?

How to check host liveness?

How to monitor CPU, memory, and disk usage?

Kubernetes Sample Questions

Describe ETCD and its characteristics.

When is ETCD appropriate?

What is Kubernetes?

Relationship between Kubernetes and Docker.

Explain Minikube, Kubectl, and Kubelet.

Common deployment methods for Kubernetes.

How does Kubernetes manage clusters?

Advantages, scenarios, and features of Kubernetes.

Current limitations of Kubernetes.

Basic concepts of Kubernetes.

Key components of a Kubernetes cluster.

Mechanism of ReplicationController (RC).

Purpose of kube‑proxy.

How kube‑proxy works with iptables and ipvs.

Differences between iptables and ipvs in kube‑proxy.

What is a static Pod?

Possible Pod states.

Process of creating a Pod.

Pod restart policies.

Pod health‑check methods.

Additional Resources

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