Scripting, Containers, and Automation

A Linux administrator wants to ensure a bash script stops execution immediately if any command fails. Which line should be added to the script?

A developer is writing a Dockerfile. The application requires a configuration file that should be copied from the build context and the container should expose port 8080. Which combination of Dockerfile instructions is correct?

An administrator is writing a bash script that loops through all .log files in /var/log and prints the file name if the file is larger than 100 kilobytes. Which loop correctly implements this?

A team uses Ansible for configuration management. They want to ensure a service is running on all managed nodes. Which Ansible module should be used in the playbook?

A Docker container is running in the background. Which command allows the administrator to execute an interactive bash shell inside the running container named 'webapp'?

In a bash script, a developer needs to parse command-line options such as -f filename and -v (verbose). Which built-in command is best suited for this task?

An administrator is troubleshooting a Kubernetes deployment that is not receiving traffic. The deployment has one replica and the pod is running. The service is of type ClusterIP. Which command would help verify that the service endpoints are correctly associated with the pod?

A DevOps engineer wants to run a Docker container with a bind mount to make a host directory /data available at /mnt/data inside the container. Which command is correct?

In bash, what is the difference between single quotes and double quotes?

An administrator needs to create a Docker image from a Dockerfile located in the current directory and tag it as 'myapp:v1'. Which command should be used?

In a bash script, a variable is set as follows: myvar='Hello World'. Which of the following correctly prints the first 5 characters of the variable?

A Podman user wants to run a container that automatically removes itself after it stops, runs in detached mode, and maps host port 80 to container port 8080. Which command is correct?

A system administrator is writing a bash script that must check if a file exists and is readable before processing. Which TWO test expressions can be used in an if statement? (Select TWO.)

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

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

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

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?

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?

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?

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?

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?

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?

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?

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

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?

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?

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

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.)

A DevOps team is designing a containerized application using Docker Compose. They need to ensure that the database container is started before the application container. Which of the following Docker Compose directives can be used to control startup order? (Choose TWO.)

An administrator is creating an Ansible playbook to configure multiple web servers. Which of the following are valid ways to define variables for different groups of hosts? (Choose TWO.)

A Linux administrator is writing a bash script that must exit immediately if any command fails. Which of the following should be included at the beginning of the script?

A DevOps engineer needs to run a Docker container in the background with port mapping from host port 8080 to container port 80, and name the container 'webapp'. Which command accomplishes this?

An administrator writes a bash script that uses a function to check if a file exists and is readable. The function returns 0 if the file meets the conditions, and 1 otherwise. Which of the following correctly implements this function?

A system administrator needs to create a Dockerfile for a Python application. The application should be installed in the container, and when the container starts, it should run the command 'python app.py'. Which Dockerfile instruction should be used to specify the default command?

A Linux administrator is writing a bash script that needs to iterate over all files ending with .log in /var/log and output the number of lines in each file. Which loop construct should be used?

A DevOps team is using Ansible to manage configuration of web servers. They need to ensure that the Apache service is running and enabled at boot on all servers in the 'webservers' group. Which playbook task accomplishes this?

A containerized application uses a volume to persist data. The administrator needs to create a new volume named 'data-vol' and mount it to /app/data in the container. Which Docker command accomplishes this?

A Linux administrator is writing a bash script that accepts command-line options: -a for all, -f for file, and -o for output. Which of the following correctly uses getopts to parse these options?

In a Kubernetes cluster, a developer needs to create a Deployment that runs three replicas of a container image 'myapp:1.0' and exposes port 8080. Which YAML snippet correctly defines this Deployment?

A user wants to execute a command inside a running Docker container named 'db'. Which command should be used?

A bash script needs to test whether a string variable $NAME is non-empty and equals 'admin'. Which of the following conditionals is correct?

An administrator needs to create a Docker network of type 'bridge' so that containers can communicate with each other by name. Which command creates a user-defined bridge network named 'my-net'?

A Linux administrator is writing a bash script to process a list of usernames stored in an array. The script must iterate over each username and print a welcome message. Which TWO of the following loops will correctly iterate over the array 'users' and print 'Welcome, <username>'? (Choose TWO.)

A DevOps engineer is creating a Dockerfile for a Node.js application. Which THREE of the following instructions are valid and commonly used in a Dockerfile? (Choose THREE.)

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.)

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?

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?

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?

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?

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

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?

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?

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?

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

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?

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

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

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

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.)

A system administrator is writing an Ansible playbook to manage a web server. Which three of the following are valid Ansible modules for system administration? (Choose THREE.)

A Linux administrator wants to run a container that stops automatically after the main process exits. Which Docker run flag should be used?

A DevOps engineer is writing a Bash script that checks if a file exists and is readable. Which test condition should be used inside an if statement?

An administrator needs to deploy a set of microservices using Docker Compose. The services require configuration values that vary between development and production environments. Which approach allows the administrator to override values without modifying the docker-compose.yml file?

A Bash script contains the following line: set -e. What is the effect of this command?

Which Dockerfile instruction sets the command to run when the container starts, but allows the user to override it when using docker run?

A system administrator is writing a Bash script that needs to iterate over a list of IP addresses stored in a file, one per line. Which loop construct should be used?

A container is running a web server on port 8080 internally, and the administrator wants to access it on the host on port 80. Which Docker run option accomplishes this?

A Bash script uses getopts to parse command-line options. The script is invoked as: ./script -a -b value. Which getopts string should be used to correctly parse -a (no argument) and -b (requires an argument)?

Which Kubernetes resource is used to store non-sensitive configuration data as key-value pairs that can be consumed by pods?

An administrator wants to use Ansible to ensure a service is running on a remote host. Which Ansible module should be used in a playbook?

In a Bash script, the administrator wants to capture the output of a command into a variable. Which syntax should be used?

A Docker container needs to persistently store data that should survive container removal and be accessible by other containers. Which storage method should be used?

A Linux administrator is writing a Bash script that must handle errors gracefully. Which TWO of the following techniques ensure the script exits on error and provides debugging information? (Select TWO.)

An administrator needs to deploy an application stack that includes a web server and a database. The containers must be able to communicate with each other and be easily managed together. Which TWO tools or methods can accomplish this? (Select TWO.)

In a Bash script, which THREE of the following are valid ways to define a function? (Select THREE.)

A Linux administrator needs to write a Bash script that runs a series of commands and stops immediately if any command fails. Which directive should be included at the beginning of the script?

A DevOps engineer is writing a Dockerfile for a Python web application. The base image is python:3.9-slim. The application code is in the current directory, and the container should expose port 8080. Which Dockerfile instructions correctly build the image and run the application using python app.py?

A system administrator is creating an Ansible playbook to deploy a web server on a group of hosts. The playbook needs to install the nginx package, start the service, and ensure it is enabled on boot. Which playbook structure is correct?

A Bash script contains the following code: if [[ $# -eq 0 ]]; then echo 'No arguments'; fi. What does this code check?

A developer wants to run a containerized application using Podman in a rootless environment. Which of the following is a key difference between Podman and Docker that the developer should be aware of?

A Kubernetes administrator needs to expose a deployment named 'web-app' running on port 80 internally within the cluster. Which kubectl command creates a service of type ClusterIP that maps port 80 to the target port 8080 on the pods?

In a Bash script, a variable is assigned the output of a command using: result=$(ls -l). What is the purpose of the $() syntax?

A Docker container needs persistent storage that survives container restarts. Which of the following is the recommended method to achieve this?

An Ansible playbook includes a handler that restarts a service when a configuration file is changed. Which directive in a task triggers the handler?

A Bash script uses getopts to parse command-line options. The options are -a (requires an argument) and -b (flag). Which code correctly implements this and stores the argument for -a in $optarg?

A developer wants to view the logs from a running Docker container named 'myapp'. Which docker command should be used?

In a Bash script, the following array is defined: fruits=('apple' 'banana' 'cherry'). Which syntax correctly iterates over all elements of the array?

A cloud engineer is using Ansible to manage configuration across multiple servers. The engineer needs to store variable data that is specific to each host and sensitive database passwords. Which two Ansible features should be used for these purposes? (Choose two.)

A Kubernetes administrator is creating a YAML manifest for a Deployment. Which three fields are required in a valid Deployment specification? (Choose three.)

A system administrator is writing a Bash script that must check if a file exists and is readable. Which two test expressions can be used to achieve this? (Choose two.)

A Linux administrator writes a bash script that needs to exit immediately if any command fails. Which of the following should be included at the beginning of the script?

A developer creates a Dockerfile for a web application. Which instruction should be used to define the command that runs when the container starts, allowing the container to accept arguments from the docker run command?

An administrator wants to run a script on multiple remote servers using Ansible. The script requires a variable that differs per host. Where should the administrator define this variable to follow best practices?

A DevOps engineer needs to debug a bash script that unexpectedly fails when processing files. Which of the following should be added to the script to print each command before execution?

A containerized application uses a bind mount to persist logs. When the container is removed and recreated, the logs are missing. What is the most likely cause?

In a bash script, an administrator wants to check if a file exists and is readable. Which of the following test expressions accomplishes this?

A Kubernetes YAML manifest defines a Deployment. Which field specifies the number of pod replicas to run?

A systems administrator is writing a bash script that must accept command-line options: -f for a configuration file, -v for verbose mode, and -d for a directory. Which TWO of the following are correct ways to parse these options using getopts? (Select TWO).

A DevOps team uses Podman to run containers rootlessly. Which TWO of the following characteristics apply to rootless Podman compared to Docker? (Select TWO).

An administrator is debugging a Docker container that exits immediately after starting. Which THREE commands can help diagnose the issue? (Select THREE).

In an Ansible playbook, which THREE of the following are valid modules for managing files and packages? (Select THREE).

A bash script uses a loop to iterate over files in a directory. Which TWO of the following loop constructs will correctly iterate over each .txt file in the current directory? (Select TWO).

A Linux administrator wants to create a Docker image from a Dockerfile. Which TWO of the following commands are needed? (Select TWO).

In a bash script, a function is defined to calculate a value. Which TWO of the following are valid ways to return a value from the function to the caller? (Select TWO).

A Kubernetes administrator needs to expose a deployment externally using a Service. Which THREE of the following Service types can be used? (Select THREE).

A DevOps engineer is writing a Bash script to automate deployment of a containerized application. The script must: (1) exit immediately if any command fails, (2) build a Docker image with tag 'myapp:latest' from the current directory, (3) run a container from that image in detached mode with port mapping 8080:80, (4) set environment variable ENV=production inside the container, and (5) bind mount a host directory /data to /app/data inside the container. Which TWO of the following snippets should be included in the script to meet these requirements? (Choose TWO.)