MasterCard Senior System Administrator Interview Questions and Answers

Online test link given data structures were asked, array problem and string problem
Likewise Double Linked List was also asked

Q1. Spring boot API endpoint description
Ans. 
Spring Boot API endpoint is a URL that exposes the functionality of a web service.
• API endpoints are the entry points for the client to access the server's resources.

• Spring Boot provides a simple and easy way to create RESTful APIs.

• Endpoints can be secured using Spring Security.

• Endpoints can be documented using Swagger or Spring REST Docs.

• Examples: /users, /products, /orders
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Q2. CI CD pipeline, Docker Kubernetes
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Hacker rank test based on string manipulation questions

Q1. 2nd round will be technical
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Q2. Yes mostly coding and DS questions you can also expect one logical IQ question
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Q1. This round was mostly behavioural and culture fit round with Manager
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Q1. Salary negotiation
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Q2. Notice period discussions
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DSA round on graph . String questions were asked

Online assessment and coding test

Q1. System Design related question to understand e2e picture of a working system in prod.
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Q2. DS-Algo based question not remember now, but easy one
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Q1. Prior project based System Design and questions around it
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Q2. Design a custom data structure based on requirement
Ans. 
Custom data structure for array of strings
• Use a trie data structure to efficiently store and search for strings

• Implement methods for adding, removing, and searching for strings in the trie

• Consider optimizing the trie for memory usage and performance
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Q3. Internal working - of DB structures and indices etc
Ans. 
Understanding internal workings of DB structures and indices is crucial for optimizing database performance.
• DB structures refer to how data is organized within a database, such as tables, columns, and relationships.

• Indices are data structures that improve the speed of data retrieval operations by providing quick access to specific data values.

• Understanding how indices work can help in optimizing query performance by re...read more
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Q1. Past Experience based questions
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Q2. Behavioral/Attitude observational Questions
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Two string related questions were there. One was to use stream api and another one was just to do perform operations on top of that.

Q1. It was technical, mostly related to your tech stack and some questions on technology your are applying for
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Q1. Some basic techno managerial round. Mostly to check problem solving skills
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Q1. Easy question from leetcode.
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Q1. Just normal questions based on resume and previous projects
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Codility Test with leetcode medium questions

Q1. Built a react feature
Ans. 
Built a react feature
• Identify the specific feature to be built

• Design the component hierarchy and state management

• Implement the feature using React components and hooks

• Test the feature for functionality and user experience

• Refactor and optimize the code for performance
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Q2. Questions based around react
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Q3. How to implement timer
Ans. 
A timer can be implemented using a combination of system time and a loop that checks for elapsed time.
• Get the current system time at the start of the timer

• Enter a loop that continuously checks the difference between the current system time and the start time

• When the desired time has elapsed, perform the desired action or trigger an event
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Q4. How to implement useEffect
Ans. 
useEffect is a hook in React that allows you to perform side effects in functional components.
• useEffect is used to handle side effects in React components.

• It takes two arguments: a function and an optional array of dependencies.

• The function inside useEffect is executed after the component renders.

• The optional array of dependencies determines when the effect should run.

• If the array of dependencies is empty, the effect r...read more
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