MasterCard Associate Software Engineer Interview Questions and Answers

Multiple questions on DSA, hiring for associate software Engineer but interviewed like they are hiring for software Engineer

Q1. Leetcode style question on summing 2 numbers
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Modify and explain code

Q1. Popular system design question
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Q1. Tell me about a time when...
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I successfully led a team project to develop a new feature for our company's website.
• Assigned tasks to team members based on their strengths and skills

• Held regular meetings to track progress and address any issues

• Collaborated with other departments to gather requirements and feedback

• Completed the project on time and within budget
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Q1. What are the best and worst solutions for the coding problem "Longest Substring Without Repeating Characters," including a detailed explanation of each solution along with their time and space complexity?
Ans. 
The Longest Substring Without Repeating Characters problem involves finding the length of the longest substring without any repeating characters.
• Best solution: Sliding Window approach with HashSet to track unique characters. Time complexity O(n), space complexity O(min(n, m)) where n is the length of the string and m is the size of the character set.

• Worst solution: Brute force approach checking all substrings for uniqu...read more
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Q1. Questions regarding Redis and cache eviction policies, and how would you implement a low-level design for the Least Recently Used (LRU) cache algorithm?
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A test that covers all fundamental topics, including networking, object-oriented programming (OOP), and data structures and algorithms (DSA).

Q1. Write code for quick sort
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Q2. Puzzle
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Q1. Explain the react lifecycle functions and how they work
Ans. 
React lifecycle functions are methods that are automatically called at specific points in a component's life cycle.
• Mounting: constructor, render, componentDidMount

• Updating: render, componentDidUpdate

• Unmounting: componentWillUnmount
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Q2. Css box model, difference between padding and margin
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Padding is the space inside the border of an element, while margin is the space outside the border.
• Padding is used to create space between the content and the border of an element.

• Margin is used to create space between the border of an element and other elements.

• Padding affects the size of the content area, while margin affects the positioning of the element.

• Example: padding: 10px will create 10 pixels of space inside ...read more
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Q1. What are your salary expectations in CTC and variables?
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Q2. Will you relocate to the location required?
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Data structures and algo. 2 ques were asked in hackerrank

Q1. Questions related to System design
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Q1. Basic question related to Spring and Java
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Java coding questions, basic Java questions.

Q1. Java basics questions.
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Q2. Live coding.
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Q1. Discussion on previous experience and projects.
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Q2. System design question
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Q1. Questions on SQL, Java advanced, personal projects, Java frameworks, UI based questions, Agile methodologies.
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Q2. Interview discussion with the whole team.
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Q1. Benefits discussion.
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Q2. Salary discussion.
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Asked 3 problem-solving questions

Q1. Asked about basic java concepts
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