How should I use these Application Deployment and Security practice questions?

Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

200-901 · topic practice

Application Deployment and Security practice questions

Q: Can I practise just Application Deployment and Security questions in a focused session?

Yes — use the session launcher on this page to start a 10-, 20-, 30- or 50-question session drawn entirely from the Application Deployment and Security domain.

Practise Cisco DevNet Associate 200-901 Application Deployment and Security practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Application Deployment and Security

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What the exam tests

What to know about Application Deployment and Security

Application Deployment and Security questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Application Deployment and Security exam traps

▸Answering from memory before reading the full scenario.
▸Missing a constraint such as cost, availability, security, scope or command context.
▸Choosing a broad answer when the question asks for the most specific fix.
▸Ignoring why the wrong options are tempting.

Practice set

Application Deployment and Security questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice

Study the full Python automation breakdown →

A developer creates a Dockerfile for a Python web application. Which instruction should be used to copy the application source code into the container image?

Trap 1: CMD

CMD provides defaults for executing container, not copying files.

Trap 2: RUN

RUN executes commands during build, not for copying files.

Trap 3: EXPOSE

EXPOSE documents ports, does not copy files.

Study all Application Deployment and Security common traps →

A
CMD
Why wrong: CMD provides defaults for executing container, not copying files.
B
COPY
COPY is the correct instruction to copy files into the image.
C
RUN
Why wrong: RUN executes commands during build, not for copying files.
D
EXPOSE
Why wrong: EXPOSE documents ports, does not copy files.

Application Deployment and Security practice questions

What to know about Application Deployment and Security

Common Application Deployment and Security exam traps

Application Deployment and Security questions

A developer creates a Dockerfile for a Python web application. Which instruction should be used to copy the application source code into the container image?

A Docker container needs to be started in detached mode with port mapping from host port 8080 to container port 80. Which command accomplishes this?

In a docker-compose.yaml file, which key is used to define the container image to be built from a Dockerfile in the current directory?

A company deploys a microservice using Kubernetes. The service must be accessible externally via a stable IP address and load-balanced across pods. Which Service type should be used?

A CI/CD pipeline has a stage that runs security vulnerability scans on dependencies. Which tool is specifically designed to scan Python packages for known vulnerabilities?

A developer is writing a Dockerfile for a Node.js application. They want to set a build-time variable for the application version that can be changed without modifying the Dockerfile. Which instruction should be used?

A Kubernetes pod needs to read configuration data such as database hostname, which is non-sensitive and may change across environments. Which resource should be used to store this data and inject it into the pod?

A developer needs to apply a Kubernetes deployment manifest from a file named 'deployment.yaml'. Which kubectl command should be used?

In a Docker bridge network, two containers can communicate with each other using which identifier by default?

A developer needs to view the logs of a running Docker container with ID 'abc123'. Which command should be used?

A Kubernetes Deployment is configured with rolling update strategy. A new version of the image is pushed, and the deployment is updated. During the rollout, the new pods are failing health checks. Which command can be used to pause the rollout and prevent further updates?

A CI/CD pipeline using GitHub Actions needs to build a Docker image and push it to Docker Hub. Which event trigger should be used to run the workflow only when code is pushed to the main branch?

A developer is implementing secure coding practices to prevent SQL injection. Which approach is most effective when building a SQL query with user input?

In a Docker Compose file with multiple services, one service depends on another to be healthy before starting. Which key should be used to express this dependency and ensure the dependent service is started first?

A Kubernetes pod needs to run a database that requires persistent storage. Which volume type should be used to store data that persists beyond the pod lifecycle?

Which TWO actions are best practices for managing secrets in a CI/CD pipeline?

Which TWO Docker network drivers allow a container to communicate with the host's network stack directly?

Which THREE options are valid methods to expose a Kubernetes service to external traffic?

A developer creates a Dockerfile with the following content: FROM python:3.9-slim, COPY app.py /app/, RUN pip install flask, EXPOSE 5000, CMD ["python", "/app/app.py"]. When building the image with 'docker build -t myapp .', what is the purpose of the EXPOSE instruction?

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