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Find an odd occurring number among even occurring numbers.
Use XOR operation to cancel out even occurring numbers and get the odd occurring number.
Iterate through the array and XOR each element with the result variable.
The final result will be the odd occurring number.
Print the spiral order of a binary tree and matrix.
For binary tree, use level order traversal and alternate direction for each level.
For matrix, use four pointers to traverse in spiral order.
Example for binary tree: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9
Example for matrix: 1 2 3 4 -> 8 7 6 5 -> 9 10 11 12 -> 16 15 14 13
Finding pairs in an array with a given sum.
Iterate through the array and for each element, check if the difference between the given sum and the element exists in the array.
Use a hash table to store the elements of the array and their indices for faster lookup.
If there are multiple pairs with the same sum, return any one of them.
If no pair is found, return null or an empty array.
Find total number of k element with given avg in an array in minimum time complexity.
Use sliding window technique to traverse the array in O(n) time complexity.
Maintain a sum variable to keep track of the sum of elements in the window.
If the sum of elements in the window is equal to k times the given avg, increment the count.
Move the window by subtracting the first element and adding the next element in the array.
Printing non-boundary elements of a binary tree
Traverse the tree in any order (preorder, inorder, postorder)
Check if the current node is not a boundary node (not the first or last node in its level)
If it is not a boundary node, print its value
Recursively traverse its left and right subtrees
posted on 11 Oct 2020
I applied via Naukri.com and was interviewed in Sep 2020. There were 5 interview rounds.
Share the link for codesignal
The question is asking for the current time and the angles formed by the hour and minute hands on a clock.
The angle between the hour and minute hands of a clock can be calculated using the formula: angle = |(30*hour - (11/2)*minutes)|
At 3:00, the angle between the hour and minute hands is 90 degrees.
At 6:00, the angle between the hour and minute hands is 180 degrees.
At 9:00, the angle between the hour and minute hands
I applied via Referral and was interviewed before Nov 2023. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in Oct 2024. There were 3 interview rounds.
There was a coding round and out of 75 students 28 got selected for next round
posted on 5 Aug 2024
I applied via Job Portal and was interviewed in Feb 2024. There were 3 interview rounds.
30 mins Aptitude Question
30 mins - 3 Coding Question
Rest API is a set of rules and conventions for building and interacting with web services using HTTP methods.
Rest API stands for Representational State Transfer Application Programming Interface.
It uses standard HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations.
RESTful APIs use URLs to access resources, and return data in JSON or XML format.
Stateless communication allows for scalability and flexibilit...
Response codes indicate the status of a HTTP request. 200 & 201 are success codes, while 400 & 403 are client error codes.
200 - OK: Request was successful
201 - Created: Request was successful and a new resource was created
400 - Bad Request: The server cannot process the request due to a client error
403 - Forbidden: The server understood the request, but refuses to authorize it
posted on 29 Jun 2024
I applied via Referral and was interviewed before Jun 2023. There were 3 interview rounds.
Coding test are just basic Array and linkedList question
The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.
Inheritance allows a class to inherit properties and behavior from another class.
Encapsulation restricts access to certain components of an object, protecting its integrity.
Abstraction hides complex implementation details and only shows the necessary features.
Polymorphism allows objects of different classes to be treated as objects of a
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
Retrieving a value involves hashing the ...
Implementation of Create, Read, Update, and Delete operations in a software system.
Use SQL queries for database operations
Create separate functions for each operation
Handle errors and exceptions properly
Test thoroughly to ensure functionality
Consider security measures to prevent unauthorized access
Seeking new challenges and opportunities for growth.
Looking for a new environment to learn and develop new skills
Interested in working on different projects and technologies
Seeking better career advancement opportunities
Wanting to work in a more collaborative team environment
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