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Mr Cooper
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I applied via Campus Placement
Low-level design interview
I need to design a Music player app using oops concept
Use an additional stack to store sorted elements and maintain the minimum element at the top of the original stack.
Create a new stack to store sorted elements.
Pop elements from the original stack and compare with the top element of the new stack.
If the popped element is smaller, push it to the new stack. If larger, keep popping from the new stack and push to the original stack until the correct position is found.
Repeat...
A process is an instance of a program running on a computer, while a thread is a smaller unit of execution within a process.
A process has its own memory space, while threads within the same process share memory.
Processes are independent of each other, while threads within the same process can communicate with each other.
Processes are heavyweight, requiring separate memory and resources, while threads are lightweight an...
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
Abstract class can have constructor, fields, and methods, while interface cannot have any of these.
A class can implement multiple interfaces but can only inherit from one abstract class.
Abstract class is used to provide a common base for multiple derived classes, while interface is used to define a contract fo...
A race condition is a situation in which the outcome of a program depends on the order of execution of its threads or processes.
Occurs when multiple threads or processes access shared data or resources concurrently
Can lead to unpredictable behavior or bugs in the program
Prevented by using synchronization mechanisms like locks or semaphores
Example: Two threads trying to increment a shared variable simultaneously
Normalization in DBMS is the process of organizing data in a database to reduce redundancy and improve data integrity.
Normalization involves breaking down a database into smaller, more manageable tables.
It helps in reducing data redundancy by storing data in a structured way.
There are different normal forms like 1NF, 2NF, 3NF, BCNF, etc.
Example: In a database of students, instead of storing student details in multiple ...
I applied via Referral and was interviewed in Mar 2024. There were 2 interview rounds.
Its mostly on Train, Pipes and Cistern, Dice reasoning
Data Structures medium level question
I applied via Walk-in and was interviewed in Sep 2023. There were 3 interview rounds.
An aptitude has exam used to determine an individual skills a given activity
I applied via LinkedIn and was interviewed in Sep 2023. There were 2 interview rounds.
Its a combination of all the questions like aptitude , logical questions, programming questions, sql, etc,...
Mr Cooper interview questions for designations
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
I applied via Recruitment Consulltant and was interviewed before Nov 2023. There was 1 interview round.
Design Google Calendar for scheduling events and appointments
Use a clean and user-friendly interface for easy navigation
Implement features like creating events, setting reminders, and sharing calendars
Include options for recurring events and color-coding for organization
I applied via Recruitment Consulltant and was interviewed in Aug 2024. There was 1 interview round.
1 hour 10 mins, MERN Stack, Face to Face. Mongodb, medium DSA Question, callback, eventloop, NodeJS asynchronous working
Policy manager is a software tool used to centrally manage and enforce policies across an organization's systems and applications.
Policy manager helps define, monitor, and enforce policies related to security, compliance, access control, and other governance aspects.
It allows administrators to set rules and regulations that govern how data and resources are accessed and used within an organization.
Policy manager can au...
I applied via Company Website and was interviewed in Oct 2022. There were 3 interview rounds.
Maths,verbal reasoning.
Like percentage,wages, proportional problems
Particular topic on political party
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Interview experience
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