10+ Associate DevOps Engineer Interview Questions and Answers

Yes, AWS Lambda can be integrated with Amazon ECR to deploy containerized applications.

• AWS Lambda supports container images, allowing you to package your code and dependencies in a Docker container.

• You can push your container images to Amazon ECR, which serves as a fully managed Docker container registry.

• To deploy a Lambda function using an ECR image, specify the image URI in the Lambda function configuration.

• Example: Use the AWS CLI command 'aws lambda create-function' with ...read more

Implementing security measures on Azure accounts is crucial for protecting sensitive data and resources.

• Enable Multi-Factor Authentication (MFA) to add an extra layer of security.

• Use Azure Active Directory (AAD) for identity management and access control.

• Implement Role-Based Access Control (RBAC) to restrict permissions based on user roles.

• Regularly review and audit access logs to monitor for suspicious activities.

• Utilize Azure Security Center for continuous security assessme...read more

Implemented various cost optimization strategies to enhance efficiency and reduce expenses in cloud infrastructure and operations.

• Utilized auto-scaling features to adjust resources based on demand, reducing costs during low-traffic periods.

• Migrated to serverless architecture for certain applications, which eliminated the need for provisioning and managing servers.

• Conducted regular audits of cloud resource usage, identifying and terminating underutilized instances to save cost...read more

Integrating Kubernetes and Docker with Jenkins enables automated CI/CD workflows for containerized applications.

• 1. Install Jenkins and required plugins: Ensure Jenkins is installed and add plugins like 'Kubernetes' and 'Docker Pipeline'.

• 2. Configure Docker: Set up Docker on the Jenkins server to build and manage container images.

• 3. Set up Kubernetes: Configure a Kubernetes cluster where Jenkins can deploy applications.

• 4. Create Jenkins Pipeline: Use a Jenkinsfile to define th...read more

Plugins in Jenkins extend its functionality, allowing integration with various tools and services for CI/CD processes.

• Plugins are modular components that enhance Jenkins capabilities.

• They allow integration with version control systems like Git and SVN.

• Examples include the Git plugin for source code management and the Docker plugin for container management.

• Plugins can be installed from the Jenkins Plugin Manager or manually.

• They support various functionalities such as notifica...read more

Amazon S3 lifecycle manages object storage through automated transitions and deletions based on defined policies.

• Lifecycle policies can transition objects to different storage classes (e.g., S3 Standard to S3 Glacier).

• Objects can be automatically deleted after a specified period (e.g., delete objects after 365 days).

• You can set rules based on object creation date or last modified date.

• Example: Move infrequently accessed data to S3 Infrequent Access after 30 days.

• Lifecycle rul...read more

GitHub Actions is a CI/CD tool that automates workflows directly in GitHub repositories.

• Automates software workflows: GitHub Actions allows you to automate tasks like testing, building, and deploying code.

• Event-driven: Workflows can be triggered by GitHub events such as push, pull requests, or issues.

• Customizable workflows: You can define workflows using YAML files, specifying jobs and steps.

• Integration with GitHub: Seamlessly integrates with GitHub repositories, making it ea...read more

Assigning the Contributor role in Azure allows users to manage resources without granting full access.

• Navigate to the Azure portal and select the subscription or resource group.

• Click on 'Access control (IAM)' in the left menu.

• Select 'Add role assignment' to open the role assignment pane.

• Choose 'Contributor' from the role list.

• Select the user, group, or service principal to assign the role to.

• Click 'Save' to apply the changes.

Elastic MapReduce (EMR) is a cloud-based big data platform for processing large datasets using frameworks like Hadoop and Spark.

• EMR simplifies running big data frameworks like Apache Hadoop, Apache Spark, and Presto.

• It allows for scalable processing of vast amounts of data across multiple EC2 instances.

• Users can easily spin up clusters, configure them, and terminate them when not needed, optimizing costs.

• EMR integrates with other AWS services like S3 for storage and RDS for d...read more

Git is a version control system used for tracking changes in code. It has various commands for managing repositories.

• Git is used for version control and collaboration in software development.

• Common commands include git add, git commit, git push, and git pull.

• Git branches allow for parallel development and merging of code.

• Git can be integrated with continuous integration and deployment tools.

• Git also has features for managing conflicts and reverting changes.

Largest Common Subsequence DP problem involves finding the longest subsequence that is common to two given strings.

• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the lengths of common subsequences of substrings.

• Traverse the array to find the length of the largest common subsequence.

• Example: Given strings 'ABCD' and 'ACD', the largest common subsequence is 'ACD'.

SQL and Lambdas can be connected through triggers or stored procedures.

• SQL triggers can be used to automatically invoke a Lambda function when certain events occur in a database.

• Stored procedures in SQL can call Lambda functions to perform specific tasks.

• AWS provides services like AWS Lambda and Amazon RDS that can be integrated to connect SQL and Lambdas.

Check if a string contains any palindromes

• Iterate through each string in the array

• Reverse the string and compare it with the original string to check for palindrome

• Return true if any palindrome is found, false otherwise

Storage classes are different types of storage options available for data management.

• Standard storage class: General purpose storage for frequently accessed data.

• Infrequent access storage class: Lower cost storage for data accessed less frequently.

• Archive storage class: Lowest cost storage for data that is rarely accessed.

• Cold storage class: Storage for data that is rarely accessed but needs to be retained for compliance or legal reasons.

SQL is a traditional relational database management system, while NoSQL is a non-relational database system.

• SQL is structured, uses tables with rows and columns, and follows ACID properties.

• NoSQL is unstructured, uses collections of documents, key-value pairs, or graphs, and is horizontally scalable.

• SQL is better for complex queries and transactions, while NoSQL is better for large amounts of data and flexible schemas.