XK0-006 Automation, Orchestration, and Scripting Practice Test 2 — 15 Questions

Question 1

A Kubernetes administrator is creating a deployment YAML manifest. Which THREE fields are required in a Deployment spec? (Select THREE.)

Accepted Answer

apiVersion. In a Kubernetes Deployment manifest, the three required top-level fields for object identification are apiVersion, kind, and metadata. While spec is also mandatory for a Deployment, the question asks for three required fields and the standard required set is apiVersion, kind, and metadata.

Answer

replicas

Answer

spec

Question 2

An Ansible playbook is being written to manage web servers. Which TWO modules can be used to ensure a package is installed? (Select TWO.)

Accepted Answer

apt. The apt module is for Debian-based systems, and yum is for Red Hat-based systems. Both manage packages.

Answer

copy

Answer

service

Answer

template

Question 3

A Linux administrator writes a Bash script and includes the line `#!/bin/bash` at the top. What is the purpose of this line?

Accepted Answer

It specifies the interpreter to execute the script.. The shebang line tells the system which interpreter to use to execute the script. In this case, it specifies the Bash shell.

Answer

It sets the script to run in the background.

Answer

It enables debugging mode.

Answer

It defines a variable for the script.

Question 4

A developer is writing a Bash script that needs to test whether a file exists and is readable. Which of the following conditionals correctly performs this check?

Accepted Answer

if [[ -f $file && -r $file ]]; then. The -f test checks for a regular file, and -r checks if it is readable. Both must be true, so they are combined with &&.

Answer

if test -f $file || test -r $file; then

Answer

if [ -f $file -a -r $file ]; then

Answer

if [ -f $file -o -r $file ]; then

Question 5

A Linux administrator is troubleshooting a Bash script that unexpectedly terminates when a command fails. The script uses `#!/bin/bash`. Which of the following commands, if placed at the beginning of the script, would cause it to exit on any command failure?

Accepted Answer

set -e. The `set -e` option makes the shell exit immediately if a command exits with a non-zero status.

Answer

set -u

Answer

trap 'exit 1' ERR

Answer

set -o pipefail

Question 6

A user wants to run a Docker container in detached mode, remove it automatically after it stops, and map host port 8080 to container port 80. Which command accomplishes this?

Accepted Answer

docker run -d --rm -p 8080:80 image. docker run --rm -d -p 8080:80 image runs in detached mode (-d), auto-removes (--rm), and maps port 8080 to 80.

Answer

docker run -it --rm -p 80:8080 image

Answer

docker create --rm -p 8080:80 image

Answer

docker start -d -p 8080:80 image

Question 7

A DevOps engineer is writing a Dockerfile. The application requires environment variables to be set at runtime from a file. Which Dockerfile instruction should be used to achieve this?

Accepted Answer

ENV. The ENV instruction sets environment variables in the Dockerfile, but for runtime from a file, the --env-file option is used with docker run. However, within the Dockerfile, ENV is the instruction to set environment variables.

Answer

CMD export

Answer

ARG

Answer

RUN export

Question 8

An administrator is managing a Kubernetes cluster. A pod is running but not responding as expected. The administrator wants to view the standard output logs from the pod's main container. Which kubectl command should be used?

Accepted Answer

kubectl logs . kubectl logs retrieves the logs from the specified pod.

Answer

kubectl exec <pod-name> -- cat /var/log/app.log

Answer

kubectl get pod <pod-name> -o yaml

Answer

kubectl describe pod <pod-name>

Question 9

An Ansible playbook is being written to install the Nginx web server on a group of Ubuntu servers. Which module should be used in the playbook to install the package?

Accepted Answer

apt. The apt module is used for package management on Debian/Ubuntu systems.

Answer

command

Answer

package

Answer

yum

Question 10

A Bash script contains the following function:

```bash
myfunc() {
  local result="$(( $1 + $2 ))"
  echo "$result"
}
```

If the script calls `myfunc 5 10`, what is the output?

Accepted Answer

15. The function adds the two arguments (5+10=15) and echoes the result, which is 15.

Answer

510

Answer

5+10

Answer

the function returns nothing

Question 11

Which of the following is a key difference between Docker and Podman?

Accepted Answer

Podman can run containers without root privileges.. Podman is daemonless and can run containers rootless, while Docker typically runs with a daemon and root privileges.

Answer

Docker does not support container images.

Answer

Podman requires a daemon to run containers.

Answer

Docker can only run on Linux.

Question 12

A system administrator wants to create a bind mount in Docker to share a host directory `/data` with a container at `/mnt/data`. Which of the following docker run options should be used?

Accepted Answer

-v /data:/mnt/data. Bind mounts are specified with -v or --mount. The -v syntax is host-path:container-path.

Answer

--mount type=volume,source=/data,target=/mnt/data

Answer

-v /data:ro

Answer

-v /mnt/data:/data

Question 13

A Kubernetes YAML manifest defines a Deployment with 3 replicas. The administrator runs `kubectl get pods` and sees 3 running pods. They then run `kubectl scale deployment mydeployment --replicas=5`. What command would confirm the new number of replicas?

Accepted Answer

kubectl get deployment mydeployment. kubectl get deployment mydeployment shows the current replicas, desired replicas, and status.

Answer

kubectl get replicasets

Answer

kubectl get pods | wc -l

Answer

kubectl describe deployment mydeployment

Question 14

Which of the following Bash variable expansions will result in the string "Hello World"?

Accepted Answer

${GREETING:-'Hello World'} when GREETING is unset. ${var:-default} expands to the value of var if var is set and not null; otherwise, it expands to default. In option C, GREETING is unset, so ${GREETING:-'Hello World'} expands to 'Hello World'. Option A: ${GREETING:+World} with GREETING=Hello expands to 'World' because + uses alternate value when var is set. Option B: ${GREETING:-World} with GREETING=Hello expands to 'Hello' because var is set. Option D: ${GREETING:=World} with GREETING unset assigns 'World' to GREETING and expands to 'World', not 'Hello World'. Therefore, only option C yields 'Hello World'.

Answer

${GREETING:+World} when GREETING=Hello

Answer

${GREETING:-World} when GREETING=Hello

Answer

${GREETING:=World} when GREETING is unset

Question 15

A Linux administrator is writing a Bash script that must accept command-line options for an input file (-i) and an output file (-o). Which of the following are valid methods to parse these options? (Choose TWO.)

Accepted Answer

Using the getopt command. getopts is a built-in for parsing options, and getopt is an external command. Both can be used.

Answer

Using positional parameters $1, $2 directly

Answer

Using a here-document

Answer

Using the shift command only