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Ksolves India Limited Software Developer Interview Questions and Answers

Updated 8 Mar 2024

Q1. find a number that not present in array in O(N) time complexity array contain only 0 to n numbers

Ans.

Use bitwise XOR operation to find the missing number in O(N) time complexity.

  • Iterate through the array and XOR all the elements with their indices and the array length.

  • The missing number will be the result of XORing all the elements with their indices and the array length.

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Q2. how to reverse a string without using extra space

Ans.

Use two pointers to swap characters in place

  • Initialize two pointers, one at the beginning of the string and one at the end

  • Swap characters at the two pointers and move them towards each other until they meet or cross

  • Repeat the process until the entire string is reversed

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Q3. how to connect mongodb with database

Ans.

To connect MongoDB with a database, you need to use the MongoDB URI and a MongoDB client library.

  • Use the MongoDB URI to specify the connection details such as host, port, username, password, and database name

  • Install a MongoDB client library like Mongoose for Node.js or pymongo for Python

  • Use the client library to establish a connection to the MongoDB database and perform CRUD operations

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Q4. write a program a string is Anagram or not

Ans.

Program to check if a string is an Anagram or not

  • Create a function that takes in two strings as input

  • Sort the characters in both strings and compare if they are equal

  • Return true if they are anagrams, false otherwise

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Q5. what is event listener

Ans.

An event listener is a function that waits for a specific event to occur and then triggers a response.

  • Event listeners are commonly used in web development to handle user interactions like clicks, keypresses, etc.

  • They are attached to specific elements and listen for events to occur on those elements.

  • Once the event occurs, the listener executes a callback function to respond to the event.

  • Example: Adding a click event listener to a button element to perform an action when the bu...read more

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Q6. what is polymorphism

Ans.

Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.

  • Polymorphism allows objects of different classes to be treated as objects of a common superclass.

  • There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

  • Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

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Interview Process at Ksolves India Limited Software Developer

based on 6 interviews
4 Interview rounds
Aptitude Test Round
Coding Test Round
Technical Round
HR Round
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