Ellie Mae Senior Software Engineer Interview Questions and Answers

Use SQL query with GROUP BY and HAVING clause to find duplicates in a table.

• Use GROUP BY clause to group rows with same values

• Use HAVING clause to filter out groups with count greater than 1

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name HAVING COUNT(*) > 1

Designing Youtube involves creating a platform for users to upload, share, and view videos.

• Allow users to create accounts and upload videos

• Implement a recommendation system based on user preferences

• Include features like comments, likes, and subscriptions

• Ensure scalability and high availability of the platform

• Consider implementing monetization options for content creators

Iterate through a map and write code to perform operations on each key-value pair.

• Use a for loop to iterate through the map

• Access the key and value of each pair using the iterator

• Perform desired operations on the key-value pairs

Grep command is used to search for specific patterns in text files.

• Use 'grep' followed by the pattern you want to search for and the file name

• Use '-i' flag for case-insensitive search

• Use '-r' flag for recursive search in directories

• Use '-v' flag to invert the match and show lines that do not match the pattern

Projects are specific tasks or assignments that require a team to work together to achieve a common goal.

• Projects involve a defined scope, timeline, and budget.

• They require a team of individuals with different skills and expertise.

• Examples include developing a new software application, implementing a new system, or conducting a research study.

I have worked on a variety of tech stacks including Java Spring, React, Node.js, and MongoDB.

• Java Spring

• React

• Node.js

• MongoDB

Lambda function is an anonymous function used for short tasks. Threads allow for concurrent execution in a program.

• Lambda function is a concise way to define small functions without a name.

• Threads allow multiple tasks to run concurrently in a program.

• Lambda functions are often used in functional programming and for callbacks.

• Threads can improve performance by utilizing multiple cores of a CPU.

• Example of lambda function...read more

CI/CD stands for Continuous Integration/Continuous Deployment, a practice in software development to automate the process of testing and deploying code changes.

• CI/CD automates the process of integrating code changes from multiple developers into a shared repository.

• It includes automated testing to ensure that code changes do not break existing functionality.

• CI/CD also automates the deployment of code changes to product...read more