Zopper Senior Software Developer Interview Questions and Answers

1. Program on LRU algorithm for pages
2. Multithreading- 3 threads to run one after - use of binary_semaphore
3. Mutex vs Semaphore

Tree based coding problem

Q1. Multithreading and locking mechanism
Add your answer
Q2. Reverse Linked list code
Add your answer

Q1. Why do you want to join Greyorange
Add your answer

Q1. Design a multithreaded logger system
Ans. 
A multithreaded logger system allows multiple threads to log messages concurrently without blocking each other.
• Use a thread-safe data structure like a concurrent queue to store log messages.

• Implement a logging class with methods for adding log messages and writing them to a file.

• Use synchronization mechanisms like locks or semaphores to ensure thread safety.

• Consider using a separate thread for writing log messages to t...read more
Answered by AI
Add your answer
Q2. How virtual pointers work?
Ans. 
Virtual pointers are used in C++ to implement polymorphism by allowing objects to be accessed through a base class pointer.
• Virtual pointers are used in C++ to achieve runtime polymorphism.

• They are created by adding virtual keyword to a function in a base class.

• Virtual pointers allow objects of derived classes to be accessed through a base class pointer.
Answered by AI
Add your answer

Q1. Basic to intermediate.net, EF, SQL, C#, OOP
Add your answer
Q2. Basics of .Net Core
Add your answer

Q1. Deep into.net and sql
Add your answer

Java internals, coding questions 2sum

Q1. Hld of your previous project
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines.
• Used React.js for front-end development

• Implemented RESTful APIs for backend using Node.js and Express

• Utilized MongoDB for database storage

• Incorporated authentication and authorization features for user security
Answered by AI
Add your answer
Q2. Question related to self build projects
Add your answer

Q1. Salary negotiation
Add your answer
Q2. Location constrain if any
Ans. 
Open to relocation for the right opportunity
• Willing to relocate for the right job opportunity

• Flexible with location for the right role

• Open to considering different locations for the right position
Answered by AI
Add your answer

Please inquire about the fundamentals of computer science, including object-oriented programming, data structures and algorithms, database management systems, and computer networks.

Three coding problems were asked one was to print frequency of each character in a string, second was also similar to this problem unable to recall it and third problem was given an array of string and range from L to R find the nth character if all strings from L to R is concatenated and sorted. Apart from these three coding problems there were 10 easy MCQ's.

Q1. Basic questions on java and spring boot, annotations, oops concept.
Add your answer
Q2. Code LRU cache(with no updates), just to implement push and pop operation with given window size of 4.
Add your answer

Q1. It was a design round where I was asked to write class models of a in memory session management system without using tools like redis.
Add your answer

Q1. Move negative elements to right side of array
Ans. 
Move negative elements to right side of array
• Iterate through the array and swap negative elements to the right side

• Use two pointers approach to keep track of positive and negative elements

• Maintain the order of elements while moving negatives to the right side
Answered by AI
Add your answer