MSys Tech India Full Stack Software Developer Interview Questions and Answers

Q1. Very basic top 50 questions on internet, basic java, inheritance, oops, solid, collections
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Q2. Diff between abstract and interface, method overloading, overriding, microservices, how do microservice communicate
Ans. 
Abstract class is a class that cannot be instantiated, while an interface is a blueprint of a class with only abstract methods.
• Abstract class cannot be instantiated, but can have both abstract and non-abstract methods.

• Interface can only have abstract methods and cannot have method implementations.

• Method overloading is having multiple methods in the same class with the same name but different parameters.

• Method overridin...read more
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Q3. Spring boot annotations, DI, hibernate, bean scopes
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Q4. Fibonacci series print
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Q1. Singliton class
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Q2. Immutable class
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Q3. Most occured letter in string ? Problem to code
Ans. 
Find the most occurred letter in a given string.
• Iterate through the string and count the occurrences of each letter

• Store the counts in a map or array

• Find the letter with the highest count
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Q4. Global exception handler ?
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Q5. Design principle?
Ans. 
Design principle is a set of guidelines that help software developers create maintainable and scalable code.
• Design principles help in creating code that is easy to understand, modify, and maintain.

• Examples of design principles include SOLID principles, DRY (Don't Repeat Yourself), KISS (Keep It Simple, Stupid), and YAGNI (You Aren't Gonna Need It).
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Q1. Design patterns
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Q2. OOPS Concept
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Q1. Questions from JavaScript, React and Node. 1st round. 2 coding questions on String and Array. Questions on Past employment experiece.
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Q1. Event Loop, SQL queries. 2 coding questions on Array and Strings.
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Q2. JavaScript and Node questions
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Q1. Why Oracle Cerner etc....
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Q1. Project, Oops Concept, Java , which technology u have used ? Framework
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Q2. Framework, Explain Long Polling ,
Ans. 
Long polling is a web technique where the client sends a request to the server and the server holds the connection open until new data is available.
• Long polling is a variation of the traditional polling technique where the client sends a request to the server and the server keeps the connection open until new data is available.

• It is often used in web applications to simulate real-time updates without the need for const...read more
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Q3. GraphQL Vs Rest
Ans. 
GraphQL is a query language for APIs that allows clients to request only the data they need, while REST is an architectural style for designing networked applications.
• GraphQL allows clients to request specific data in a single request, reducing over-fetching and under-fetching of data.

• REST uses multiple endpoints for different resources, leading to multiple requests for related data.

• GraphQL provides a strongly typed sc...read more
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Synonyms,math, opposite words english, reasoning,

Oops, table,star,inverse,array, method overloading, overriding

Round duration - 90 minutes
Round difficulty - Hard

Test was conducted on Hackerearth. 
Test consist of 3 questions (1 medium strings related question + 1 hard digit dp question + 1 hard lazy segment tree question)

Q1. 
Next Smallest Palindrome Problem Statement
Given a string representation of a number 'S', determine the smallest palindrome that is strictly greater than this number 'N'.
Example:
Input:
3
2
99
3
123
4
4567
...read more
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Q2. 
Count Subarrays with Sum Divisible by K
Given an array ARR and an integer K, your task is to count all subarrays whose sum is divisible by the given integer K.
Input:
The first line of input contains an...read more
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Q3. 
Minimum Operations to Equalize Array
Given an integer array ARR of length N where ARR[i] = (2*i + 1), determine the minimum number of operations required to make all the elements of ARR equal. In a single...read more
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Round duration - 90 Minutes
Round difficulty - Medium

Timing : 8:00 am - 9:30 am
The interview took place on google meet. The interviewer gave 1 coding question on google docs and have to write the code on google doc itself.
After 45 minutes a second interviewer came in the same meeting and he also gave a coding question in the same google doc.

Q1. 
Rank from Stream Problem Statement
Given an array of integers ARR and an integer K, determine the rank of the element ARR[K].
Explanation:
The rank of any element in ARR is defined as the number of elem...read more
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Q2. 
Edit Distance Problem Statement
Given two strings S and T with lengths N and M respectively, your task is to find the "Edit Distance" between these strings.
The Edit Distance is defined as the minimum nu...read more
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Round duration - 60 Minutes
Round difficulty - Medium

Timing : 10:30 am - 11:30 am
The interview took place on google meet. The interviewer gave 1 coding question on google docs and have to write the code on google doc itself.

Q1. 
Smaller Elements Count Problem Statement
Given an array of size N, return a count array such that COUNT[i] equals the number of elements which are smaller than ARR[i] on its right side.
Input:
Input For...read more
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Round duration - 15 Minutes
Round difficulty - Easy

Timing : 11:45am - 12:00 pm.
The interview took place on google meet.