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Question 281

Which Git command creates a new branch and switches to it in one operation?

1. git branch –new
2. git checkout -b
3. git switch –copy
4. git create-branch

Correct Answer: 2

Explanation

The git checkout -b command creates a new branch and switches the working directory to that branch. This is useful when an administrator or developer wants to work on a new feature or configuration change without changing the main branch. Modern Git also provides git switch -c for the same general purpose. Branches help isolate changes and make collaboration safer. Before creating a branch, it is good practice to ensure that existing local changes are committed or intentionally preserved.

Question 282

Which Git command shows the branches that exist in the local repository?

1. git branch
2. git list
3. git branches
4. git show-branches

Correct Answer: 1

Explanation

The git branch command lists local Git branches when used without additional options. It also indicates the currently checked-out branch. Branches are useful for separating development work, infrastructure changes, experiments, and fixes. Administrators working with automation repositories should know which branch contains the approved configuration before making changes. Remote branches can be displayed with additional options. Keeping branch names organized makes collaboration and change tracking easier, especially when multiple people manage infrastructure.

Question 283

Which Git command combines changes from another branch into the current branch?

1. git join
2. git merge
3. git combine
4. git integrate

Correct Answer: 2

Explanation

The git merge command combines the changes from one branch into the currently checked-out branch. It is commonly used when completed work needs to be integrated into another branch. If conflicting changes affect the same parts of files, Git may report a merge conflict that must be resolved manually. Administrators should review changes carefully before merging infrastructure or automation code. After resolving conflicts, the resulting configuration should be tested before being deployed to production systems.

Question 284

Which Git command displays the changes that have been made but are not yet committed?

1. git diff
2. git changes
3. git compare-working
4. git modified

Correct Answer: 1

Explanation

The git diff command displays differences between versions of files, including changes in the working directory that have not been committed. This is useful for reviewing configuration files, scripts, and automation changes before committing them. Reviewing differences can help identify accidental edits, debugging code, credentials, or other unwanted changes. Administrators should avoid committing secrets or sensitive information into repositories. A careful git diff review is a simple but effective step before creating a commit.

Question 285

Which Bash construct is commonly used to test whether a file exists?

1. [ -f “$file” ]
2. [ -network “$file” ]
3. [ -file “$file” ]
4. [ -exists “$file” ]

Correct Answer: 1

Explanation

In Bash, [ -f “$file” ] tests whether the specified path exists and is a regular file. File tests are useful in scripts that need to validate configuration files, backups, logs, or input data before performing an operation. Other tests can check directories, permissions, or whether a path exists. Quoting variables such as “$file” is good practice because it prevents spaces or special characters in filenames from causing unexpected word splitting or command behavior.

Question 286

Which Bash construct is commonly used to test whether a directory exists?

1. [ -folder “$dir” ]
2. [ -d “$dir” ]
3. [ -directory “$dir” ]
4. [ -pathdir “$dir” ]

Correct Answer: 2

Explanation

The Bash test [ -d “$dir” ] checks whether the specified path exists and is a directory. This is useful in automation scripts that need to create directories, copy files, or perform operations only when a required directory is available. For example, a script can check for a backup directory before writing data to it. Proper quoting and error handling are important when using variables. File tests make shell scripts more reliable and reduce failures caused by missing paths.

Question 287

Which shell keyword is commonly used to handle an alternative condition when an if test is false?

1. else
2. otherwise
3. alternate
4. fallback

Correct Answer: 1

Explanation

The else keyword provides an alternative block of commands when the condition in a Bash if statement is false. For example, a script can check whether a service is active and run one set of commands if it is, while performing another action if it is not. Conditional logic is important in automation because scripts often need to respond differently depending on system state. Administrators should keep conditions simple and test scripts carefully before using them on production systems.

Question 288

Which Bash keyword is commonly used to stop a loop immediately?

1. exit-loop
2. stop
3. break
4. endloop

Correct Answer: 3

Explanation

The break statement terminates the current loop in Bash. It is useful when a script has found the required result or when continuing the loop is no longer necessary. For example, a script searching through files can use break after finding the first matching file. This can improve efficiency and make automation easier to understand. Administrators should make sure the condition that triggers break is correct, because an incorrect condition can cause a loop to stop earlier than intended.

Question 289

Which Python data type stores an ordered collection of items that can be changed after creation?

1. Tuple
2. Set
3. List
4. String

Correct Answer: 3

Explanation

A Python list is an ordered collection that can be modified after it is created. Items can be added, removed, or changed using operations such as append, remove, and indexing. Lists are useful in automation scripts for storing hostnames, package names, file paths, or other collections of values. Tuples are also ordered but are generally immutable, while sets are designed for unordered unique values. Choosing the correct data type makes scripts easier to write and maintain.

Question 290

Which Python keyword is used to handle exceptions in a script?

1. try
2. catch
3. error
4. handle

Correct Answer: 1

Explanation

Python uses the try statement together with except to handle exceptions. Code that might produce an error can be placed inside a try block, while the except block can respond to a specific failure. This is useful in automation scripts because files may be missing, network connections may fail, or commands may return unexpected results. Good exception handling prevents a script from failing silently or producing confusing output. Administrators should catch meaningful exceptions rather than hiding every possible error.

Question 291

Which Ansible file normally defines hosts and groups that Ansible can manage?

1. Inventory
2. Handler
3. Role
4. Template

Correct Answer: 1

Explanation

An Ansible inventory defines the hosts and groups that Ansible can manage. It can contain individual systems, host groups, connection information, and variables. Inventories may be written in formats such as INI or YAML, or they can be generated dynamically in larger environments. A well-organized inventory makes automation easier because playbooks can target groups rather than individual systems. Administrators should ensure that hostnames, connection methods, and credentials are configured securely before running automation against production machines.

Question 292

Which Ansible feature is designed to run a task only when a related task reports a change?

1. Variables
2. Handlers
3. Facts
4. Inventories

Correct Answer: 2

Explanation

Ansible handlers are tasks that run when they are notified by another task that reports a change. A common example is restarting a service only after its configuration file has actually changed. This avoids unnecessary service restarts and reduces disruption. Handlers are usually placed in the handlers section of a playbook or role. Proper use of handlers makes automation more efficient and predictable. Administrators should notify handlers only when the related change genuinely requires the follow-up action.

Question 293

Which Ansible feature allows the same configuration logic to be reused across multiple playbooks?

1. Roles
2. Inventory groups
3. Ad hoc commands
4. Facts

Correct Answer: 1

Explanation

Ansible roles provide a structured way to organize reusable automation content. A role can contain tasks, handlers, variables, templates, files, and other components required to configure a particular service or system function. Roles make large automation projects easier to maintain because related content is grouped together. For example, an organization can create a reusable web-server role and apply it to multiple environments. Proper role structure also makes testing and collaboration easier.

Question 294

What is the main purpose of an Ansible variable?

1. To store values that can be reused by tasks and templates.
2. To replace the Linux kernel.
3. To create physical network cables.
4. To encrypt every system file automatically.

Correct Answer: 1

Explanation

Ansible variables store values that can be reused by playbooks, tasks, templates, and roles. For example, a variable can contain a package name, service port, application version, or configuration path. Variables help make automation flexible because the same playbook can be used in different environments with different values. Administrators should organize variable definitions carefully and protect sensitive values. Secrets can be handled with tools such as Ansible Vault rather than storing passwords directly in plain-text playbooks.

Question 295

Which technology is commonly used to package an application together with its dependencies into a portable container image?

1. Docker
2. GRUB
3. Samba
4. LVM

Correct Answer: 1

Explanation

Docker is a widely used container technology that packages applications and their dependencies into images that can be run as containers. Containers share the host kernel while providing process and filesystem isolation. This makes them useful for consistent application deployment across development, testing, and production environments. Administrators should still apply security updates, limit container privileges, and use trusted images. Containers are not the same as full virtual machines because they do not normally include a separate guest kernel.

Question 296

Which Docker command downloads an image from a configured container registry?

1. docker fetch
2. docker pull
3. docker download
4. docker image-get

Correct Answer: 2

Explanation

The docker pull command downloads a container image from a configured registry. For example, an administrator can use it to retrieve an image before creating a container from that image. Image tags help identify versions, but relying only on mutable tags can make deployments less predictable. Production environments should use trusted images and appropriate version controls. Administrators should also consider image scanning and supply-chain security before deploying third-party container images.

Question 297

Which Docker feature limits and isolates processes from the host and other containers?

1. Namespaces
2. BIOS
3. RAID
4. Filesystem labels

Correct Answer: 1

Explanation

Linux namespaces provide isolation for resources such as processes, networking, mounts, and users. Container technologies such as Docker use namespaces to help separate containers from one another and from the host system. Containers also use control groups, or cgroups, to manage resource usage such as CPU and memory. Understanding these mechanisms helps administrators troubleshoot container behavior and security. Container isolation is useful, but it should not be treated as an absolute security boundary without additional controls.

Question 298

Which Kubernetes object is the smallest deployable unit that can contain one or more containers?

1. Cluster
2. Node
3. Pod
4. Namespace

Correct Answer: 3

Explanation

A Kubernetes Pod is the smallest deployable unit in Kubernetes and can contain one or more containers that share certain resources, such as networking and storage. Pods are normally managed indirectly through higher-level controllers such as Deployments. A Kubernetes cluster contains control-plane components and worker nodes that run workloads. Understanding the difference between Pods, nodes, and clusters is important when troubleshooting Kubernetes applications. Administrators should inspect Pod status, events, logs, and resource usage when diagnosing workload problems.

Question 299

Which Kubernetes object is commonly used to maintain a desired number of identical application Pods?

1. Deployment
2. ConfigMap
3. Secret
4. ServiceAccount

Correct Answer: 1

Explanation

A Kubernetes Deployment manages a desired number of replicated Pods and helps maintain the requested application state. If a Pod fails, the Deployment controller can create another Pod to maintain the desired replica count. Deployments also support controlled updates and rollbacks for applications. This declarative approach allows administrators to describe the desired state rather than manually managing every Pod. When troubleshooting a Deployment, administrators can inspect its status, ReplicaSets, Pods, events, and container logs.

Question 300

Which practice integrates security checks into the software development and delivery process instead of waiting until the final deployment stage?

1. DevSecOps
2. Cold booting
3. Disk mirroring
4. Manual patching

Correct Answer: 1

Explanation

DevSecOps integrates security practices throughout the development and delivery lifecycle. Security checks can include dependency scanning, static analysis, secret detection, container image scanning, and infrastructure validation. The goal is to identify security problems earlier, when they are generally easier and less expensive to fix. For Linux administrators, DevSecOps can involve securing automation code, CI/CD pipelines, containers, and infrastructure definitions. Security should be treated as part of normal engineering work rather than as a separate final-stage activity.