McKinsey & Company Software Developer Interview Questions and Answers

Q1. Basic Java questions
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Q2. Spring, Spring boot basics
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Q1. Microservices Communications
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Q2. Project level experiences
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Q1. What is dom? in javaScript
Ans. 
DOM stands for Document Object Model. It is a programming interface for web documents that allows scripts to dynamically access and update the content, structure, and style of a webpage.
• DOM is a tree-like structure that represents the elements of an HTML document.

• It allows developers to manipulate the content and structure of a webpage using JavaScript.

• Example: document.getElementById('myElement') allows you to access
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Q2. What is virtual dom in react js
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Virtual DOM is a lightweight copy of the actual DOM in React.js, used for efficient updates and rendering.
• Virtual DOM is a concept where a lightweight copy of the actual DOM is maintained by React.js.

• It allows React to efficiently update and render components by comparing the virtual DOM with the actual DOM.

• When changes are made to the virtual DOM, React calculates the most efficient way to update the actual DOM.

• This h...read more
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Basic aptitude questions. Could be done easily if practiced enough

Q1. Introduce yourself
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Q2. Array searching
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Q1. Java questions , stream api
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Q2. Whatever you have mention in resume
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Q1. When have you had a conflict with someone.
Ans. 
I had a conflict with a team member over project priorities.
• Miscommunication led to conflicting priorities

• Discussed the issue openly and found a compromise

• Learned the importance of clear communication in team projects
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Q2. Tell me you greatest project
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Developed a web-based project management tool for tracking tasks and deadlines
• Used React for front-end development

• Implemented user authentication and authorization using JWT tokens

• Utilized Node.js and Express for back-end development

• Integrated MongoDB for database storage
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Coding test was of two hours, and two difficult hard question was passed

In the group discussion, they asked the question based on the project

Challenging questions in mathematics.

A constructive discussion about the significance of various topics and additional aspects.

Q1. Questions based on Java , C++ , OOPs, cloud computing, one coding question, regarding previous projects, some behavioural questions.
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