Tetherfi Technologies Software Engineer Interview Questions and Answers

Q1. What is the inheritance?
Ans. 
Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override or extend the functionality of the base class
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Q2. What are the types of joins in mysql
Ans. 
Types of joins in MySQL include inner join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full join: Returns rows when there is a match in one of the tables.
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Q1. How to handle multiple api's
Ans. 
Use a centralized API gateway to manage and route requests to multiple APIs efficiently.
• Implement a centralized API gateway to handle incoming requests and route them to the appropriate API based on the endpoint.

• Utilize API management tools like Apigee, Kong, or AWS API Gateway to manage and monitor multiple APIs.

• Consider implementing a caching layer to improve performance and reduce the number of requests to external
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Q2. What does strstr function do?
Ans. 
strstr function searches for a substring within a string and returns a pointer to the first occurrence of the substring.
• Used in C programming language

• Syntax: char *strstr(const char *haystack, const char *needle)

• Example: char *str = strstr("hello world", "world")
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Q1. Questions around Data structures like LinkedList, stack and queue
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Q2. Coding questions based on Array and strings in java.
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Q3. Few questions around java8 streams
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The topic given to me is AI is good or bad

Q1. Program to find prime number
Ans. 
A program to find prime numbers in a given range.
• Iterate through numbers in the given range

• Check if each number is divisible by any number other than 1 and itself

• If not divisible, then the number is prime
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Q2. Program to find the duplicates
Ans. 
Program to find duplicates in an array of strings
• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found
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Q1. Self introduction
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Q2. Explanation of project code
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The project code is a web application that allows users to create and share interactive quizzes.
• The code uses HTML, CSS, and JavaScript to create the front-end interface.

• It utilizes Node.js and Express for the back-end server.

• MongoDB is used as the database to store user-generated quizzes.

• Socket.io is used for real-time communication between users during quiz sessions.
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Q1. Coding question based on stacks
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Q2. Java and Spring Boot questions..too much grilling
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DESIGN 40 MINS HACKERRANK

DESIGN 40 MINS HACCKERANK

Coding test contains two graph problems

Q1. LRU Cache question and couple on array
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Q1. System Design question related to Lift
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Q1. Managerial, project related and SQL
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There should be 2 coding questions we have to solve that

Q1. They ask dsa questions
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