10+ DevOps Intern Interview Questions and Answers

The minimum number of towers required to cover all houses.

• Iterate through the houses and find the maximum distance between any two adjacent houses.

• Divide this maximum distance by the range of each tower to get the minimum number of towers required.

• If there is a remainder, add one to the result.

• Return the minimum number of towers.

Linux file system folders and their roles

• The / directory is the root directory

• The /bin directory contains essential command binaries

• The /etc directory contains configuration files

• The /home directory contains home directories for users

• The /lib directory contains shared library files

• The /tmp directory contains temporary files

• The /usr directory contains user binaries, libraries, documentation, and source-code

• The /var directory contains variable data files

Find minimum deletions to make a sequence sorted.

• Count the number of elements that are not in increasing order.

• Subtract the count from the length of the sequence to get the minimum deletions.

• Use dynamic programming to optimize the solution.

• Time complexity: O(nlogn) using binary search.

Automation script to set email alerts for memory consumption

• Use a monitoring tool like Nagios or Zabbix to track memory consumption

• Write a script to periodically check memory usage and compare it to a predefined threshold

• If memory usage exceeds the threshold, send an email alert to the specified recipients

Placement Group is a logical grouping of instances within a single Availability Zone.

• It helps to achieve low-latency network performance by grouping instances in a single rack.

• It is used to deploy a group of instances that need to be in close proximity to each other.

• It is only available for certain instance types and cannot span multiple Availability Zones.

To install an operating system, you need to boot from installation media and follow the on-screen instructions.

• Create a bootable installation media (USB, DVD, etc.)

• Insert the installation media into the computer

• Boot the computer from the installation media

• Follow the on-screen instructions to select language, partition the disk, and install the OS

• Reboot the computer after installation is complete

Containerisation is a method of packaging and running applications in isolated environments called containers.

• Containers are lightweight, portable, and can run on any platform that supports containerisation.

• Benefits include improved scalability, faster deployment, resource efficiency, and easier management.

• Containers help in achieving consistency across different environments and simplifying the development process.

• Popular containerisation tools include Docker, Kubernetes, an...read more

CI/CD pipeline is a set of automated processes for building, testing, and deploying software.

• CI/CD stands for Continuous Integration/Continuous Deployment

• It automates the process of integrating code changes, testing them, and deploying them to production

• Common tools used in CI/CD pipelines include Jenkins, GitLab CI, and CircleCI

• CI/CD pipelines help teams deliver software faster and with fewer errors

Jenkins CICD Pipeline is a tool that allows for the automation of building, testing, and deploying code changes.

• Jenkins CICD Pipeline is a series of steps that automate the software delivery process.

• It allows for continuous integration, continuous delivery, and continuous deployment.

• Pipeline stages can include building code, running tests, and deploying to production.

• Jenkins Pipeline can be defined using a Jenkinsfile, which is written in Groovy.

• It helps in reducing manual er...read more

Exam abstraction is the process of simplifying complex exam questions to make them easier to understand.

• Exam abstraction involves breaking down complex questions into simpler components

• It helps to identify the key concepts and ideas being tested

• It can be done by rephrasing the question or breaking it down into smaller parts

• Example: 'What is the impact of climate change on the environment?' can be abstracted to 'How does rising temperatures affect plant and animal life?'

The four pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.

• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions together and restricting access to them.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Using a single interface to represent different types of objects.

TensorFlow is an open-source machine learning framework developed by Google for building and training neural networks.

• TensorFlow is widely used for tasks such as image recognition, natural language processing, and more.

• It allows users to create complex neural network architectures using high-level APIs.

• TensorFlow provides tools for data visualization, model debugging, and deployment to production environments.

Optum values innovation, collaboration, integrity, and compassion in their work culture.

• Optum values innovation by constantly seeking new ways to improve healthcare services.

• Collaboration is important at Optum as teams work together to achieve common goals.

• Integrity is a core value at Optum, ensuring honesty and ethical behavior in all aspects of their work.

• Compassion is shown through a focus on improving patient outcomes and overall healthcare experiences.

Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.

• Kubernetes uses a master-slave architecture with a master node controlling multiple worker nodes.

• It allows for automatic scaling, self-healing, and rolling updates of applications.

• Kubernetes uses declarative configuration files (YAML or JSON) to define the desired state of the cluster.

• It provides features like service discovery, load b...read more

Projects are specific tasks or assignments that individuals or teams work on to achieve a particular goal or outcome.

• Projects have defined objectives and timelines

• They require resources such as time, money, and manpower

• Project management methodologies like Agile or Waterfall are often used to plan and execute projects