XK0-006 Automation, Orchestration, and Scripting Practice Test 4 — 15 Questions

Question 1

An administrator is troubleshooting a Pod in a Kubernetes cluster that is not starting. Which TWO kubectl commands are most useful for diagnosing the issue? (Choose TWO.)

Accepted Answer

kubectl logs <pod-name>. kubectl describe pod provides detailed event and status information, and kubectl logs retrieves container logs.

Answer

kubectl get nodes

Answer

kubectl apply -f pod.yaml

Answer

kubectl delete pod <pod-name>

Question 2

A Linux administrator wants to ensure a Bash script exits immediately if any command fails. Which directive should be included at the beginning of the script?

Accepted Answer

set -e. The set -e command tells the shell to exit if any command exits with a non-zero status.

Answer

set -o pipefail

Answer

set -u

Answer

set -x

Question 3

A developer is writing a Bash script that needs to parse command-line options with arguments, such as -f filename and -v. Which built-in command should be used to handle these options?

Accepted Answer

getopts. getopts is the standard Bash built-in for parsing short options with or without arguments.

Answer

getopt

Answer

case

Answer

shift

Question 4

A Linux administrator needs to run a Docker container in detached mode with port mapping from host port 8080 to container port 80, and mount a host directory /data to /app/data inside the container. Which command achieves this?

Accepted Answer

docker run -d -p 8080:80 -v /data:/app/data --name webapp nginx. docker run -d -p 8080:80 -v /data:/app/data --name webapp nginx runs the container detached, maps ports, and mounts a bind volume.

Answer

docker run -it -p 8080:80 -v /data:/app/data --name webapp nginx

Answer

docker run -d -P -v /data:/app/data --name webapp nginx

Answer

docker start -d -p 8080:80 -v /data:/app/data webapp

Question 5

An administrator is writing a Dockerfile. They need to set a default command that can be overridden when running the container. Which instruction should be used?

Accepted Answer

CMD. CMD provides defaults that can be overridden by command-line arguments, while ENTRYPOINT cannot be easily overridden without --entrypoint.

Answer

RUN

Answer

ENTRYPOINT

Answer

EXPOSE

Question 6

In a Bash script, what is the correct way to check if a file named '/etc/passwd' exists and is a regular file?

Accepted Answer

if [ -f /etc/passwd ]. The -f file test operator returns true if the file exists and is a regular file.

Answer

if [ -r /etc/passwd ]

Answer

if [ -e /etc/passwd ]

Answer

if [ -s /etc/passwd ]

Question 7

A system administrator needs to update a configuration file on multiple servers using Ansible. The playbook must ensure the line 'MaxAuthTries 3' is present in /etc/ssh/sshd_config. Which Ansible module is most appropriate?

Accepted Answer

lineinfile. The lineinfile module ensures a specific line is present in a file, ideal for configuration management.

Answer

template

Answer

shell

Answer

copy

Question 8

A DevOps engineer is writing a Bash script that iterates over all items in an array. The array is declared as 'fruits=("apple" "banana" "cherry")'. Which loop correctly iterates over each element?

Accepted Answer

for fruit in "${fruits[@]}"; do ... done. To iterate over array elements, use "${fruits[@]}" with quotes. The @ expands to all elements.

Answer

for (i=0; i<${#fruits[@]}; i++); do ... done

Answer

for fruit in ${fruits[*]}; do ... done

Answer

for fruit in $fruits; do ... done

Question 9

A container is running and a technician needs to execute an interactive shell inside it. The container was started with 'docker run -d --name myapp myimage'. Which command will achieve this?

Accepted Answer

docker exec -it myapp /bin/bash. docker exec -it myapp /bin/bash runs an interactive shell inside the running container.

Answer

docker attach myapp

Answer

docker run -it --name myapp myimage /bin/bash

Answer

docker logs -f myapp

Question 10

In a Bash script, what is the purpose of the shebang '#!/bin/bash'?

Accepted Answer

It specifies the path to the Bash executable that should run the script.. The shebang tells the system which interpreter to use to execute the script.

Answer

It defines a variable for the Bash version.

Answer

It sets the script's permissions to executable.

Answer

It enables debug mode for the script.

Question 11

An administrator is investigating a Bash script that is failing unexpectedly. They want to see each command as it is executed to debug the script. Which command should be added to the script?

Accepted Answer

set -x. set -x enables a trace of commands and their arguments as they are executed.

Answer

set -v

Answer

set -e

Answer

set -o xtrace

Question 12

A Kubernetes administrator needs to expose a deployment named 'webapp' as a service accessible externally on port 80. Which kubectl command should be used?

Accepted Answer

kubectl expose deployment webapp --type=NodePort --port=80. kubectl expose deployment webapp --type=NodePort --port=80 creates a service that exposes the deployment externally.

Answer

kubectl port-forward deployment/webapp 80:80

Answer

kubectl run webapp --port=80

Answer

kubectl create service clusterip webapp --port=80

Question 13

In a Bash script, what is the difference between single quotes and double quotes?

Accepted Answer

Single quotes prevent variable expansion; double quotes allow it.. Single quotes preserve the literal value of each character, while double quotes allow variable expansion and command substitution.

Answer

Both behave the same.

Answer

Single quotes allow variable expansion; double quotes do not.

Answer

Double quotes prevent all substitutions; single quotes allow command substitution.

Question 14

A Linux administrator is writing a Bash script that uses a function. Which two statements about Bash functions are correct? (Choose TWO.)

Accepted Answer

Functions are called by their name without parentheses.. Bash functions must be defined before use and are called by name without parentheses.

Answer

Function definitions must be placed at the beginning of the script.

Answer

Functions cannot accept arguments.

Answer

Functions can be called before they are defined.

Question 15

A DevOps engineer is building a Docker image for a web application. They want to ensure the image is as small as possible and that sensitive data is not left in layers. Which two practices help achieve these goals? (Choose TWO.)

Accepted Answer

Using multi-stage builds to separate build and runtime environments.. Combining RUN commands reduces layers, and using multi-stage builds avoids including build tools in the final image.

Answer

Using the ADD instruction instead of COPY.

Answer

Using the latest tag for base images.

Answer

Installing all packages in a single layer.