MasterCard Interview Questions, Process, and Tips

Q1. Describe your project
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Q2. Java code to find numbe of repeated characters in String
Ans. 
Java code to find number of repeated characters in a String.
• Create a HashMap to store characters and their counts.

• Iterate through the String and update the counts in the HashMap.

• Count the characters with counts greater than 1 to find repeated characters.
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Q1. Describe design patterns in Microservice
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Design patterns in Microservices are reusable solutions to common problems encountered in designing and implementing microservices architecture.
• Design patterns help in structuring microservices for scalability, resilience, and maintainability.

• Some common design patterns in microservices include Service Registry, Circuit Breaker, API Gateway, and Event Sourcing.

• Service Registry pattern involves a central registry that a...read more
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Design discussion for use case

Q1. Describe your project
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Q1. Why do you want to join Mastercard
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Q1. Do you have knowledge about KPIs
Ans. 
Yes, KPIs are key performance indicators used to measure the success of a product or project.
• KPIs are specific metrics used to evaluate the performance of a product or project.

• They help track progress towards goals and objectives.

• Examples of KPIs include conversion rates, customer satisfaction scores, and revenue growth.

• KPIs should be aligned with the overall business strategy and objectives.
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Q2. How does a typical Agile product work
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Agile product development involves iterative and incremental development cycles to quickly deliver value to customers.
• Cross-functional teams work in short iterations called sprints

• Prioritize features based on customer feedback and business value

• Regularly review and adapt to changes in requirements

• Deliver working software frequently, typically every 2-4 weeks
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First round was screening of resume and few basic coding questions

In second round there is 3 panels at same day for 3 hours one after one all there round are technical and coding interviews level is hard one after another round. Situational questions and current project details in deep. Be prepare for coding.

Q1. Normal discussion in HR Round about company details and salary discussions.
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Q1. Recursion program
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Q2. System Design questions based on current project
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Q3. Micro service design patterns
Ans. 
Micro service design patterns are architectural patterns used to design and implement microservices.
• Service discovery

• Circuit breaker

• API gateway

• Event sourcing

• Saga pattern
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