IVP (India) Software Developer Interview Questions and Answers

Q1. What is arrow function in JS
Ans. 
Arrow functions are a concise way to write functions in JavaScript.
• Arrow functions have a shorter syntax compared to regular functions.

• They do not have their own 'this' keyword, and instead inherit 'this' from the parent scope.

• Arrow functions are best suited for non-method functions, and cannot be used as constructors.

• Example: const add = (a, b) => a + b;
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Q2. What is runtime polymerphism
Ans. 
Runtime polymorphism is the ability of a subclass to override a method from its superclass during runtime.
• Runtime polymorphism is achieved through method overriding in object-oriented programming.

• It allows a subclass to provide a specific implementation of a method that is already defined in its superclass.

• The actual method called is determined by the type of object at runtime.

• Example: Animal class has a method 'makeSo...read more
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Q3. What is abstraction in oops
Ans. 
Abstraction in OOP is the concept of hiding complex implementation details and showing only the necessary features to the outside world.
• Abstraction allows us to focus on what an object does rather than how it does it

• It helps in reducing complexity and improving maintainability of code

• Example: A car is an abstraction of various components like engine, wheels, etc. Users interact with the car without needing to know the ...read more
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DSA questions Reverse the linkedlist

Q1. Explain your project
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Q2. He asked two SQL queries
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Tricky questions from js, sql, c#

Q1. Uses of B Tree
Ans. 
B Trees are used for indexing in databases and file systems.
• Used for efficient searching, insertion, and deletion operations in databases.

• Helps in maintaining sorted data for quick retrieval.

• Commonly used in file systems to store large amounts of data efficiently.

• Each node in a B Tree can have multiple children, reducing the height of the tree.
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Q2. What is CTE in sql
Ans. 
CTE stands for Common Table Expression in SQL, used to create temporary result sets that can be referenced within a SELECT, INSERT, UPDATE, or DELETE statement.
• CTEs improve readability and maintainability of complex queries

• CTEs can be recursive, allowing for hierarchical data querying

• CTEs are defined using the WITH keyword followed by the CTE name and query
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Q1. Program to reverse a linked list
Ans. 
Reverse a linked list by changing the next pointers of each node to point to the previous node.
• Start with three pointers: current, prev, and next.

• Iterate through the linked list, updating the next pointers to point to the previous node.

• Update prev, current, and next pointers in each iteration until the end of the list is reached.
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Q2. Puzzles from geeksforgeeks
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Q1. General HR questions like difficulties, strength weakness etc.
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Only DSa and aptitude was asked