MasterCard Lead Software Engineer Interview Questions and Answers

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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Q1. DSA round containing 2 coding questions along with some Java Questions
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Q1. Design Round along with some puzzles
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Q1. Managerial Round
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Q1. Explain Concurrency
Ans. 
Concurrency is the ability of a system to execute multiple tasks simultaneously.
• Concurrency allows multiple tasks to run concurrently, improving performance and efficiency.

• Concurrency can be achieved through multithreading or multiprocessing.

• Example: A web server handling multiple requests simultaneously using multithreading.
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Q2. Explain Acid principles
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ACID principles are a set of properties that guarantee database transactions are processed reliably.
• Atomicity: Transactions are all or nothing. If one part of the transaction fails, the entire transaction is rolled back.

• Consistency: Transactions bring the database from one valid state to another. All constraints are satisfied.

• Isolation: Transactions are isolated from each other until they are completed.

• Durability: Once...read more
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Write a script in python to test json

Q1. Oops concepts ML topics
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Map question with frequency in a vector

Q1. Discussion on the test plus a logical puzzle also
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It was on mettle, had 3 coding qns, MCQs on DBMS, CN, Aptitude etc

It was on a quote by FB saying everyone wants to become like Musk, it went on for 30 mins

Q1. It was basic behavioral questions
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Q1. Tell me about yourself and about previous organisation.
Ans. 
I am a software developer with 5 years of experience. I previously worked at XYZ Company as a full-stack developer.
• 5 years of experience in software development

• Previous role as a full-stack developer at XYZ Company

• Proficient in programming languages such as Java, Python, and JavaScript
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Q2. Basic technical questions about the framework and the specific language.
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Q1. More technical questions
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SQL and coding questions

Q1. Salary negotiation
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