Jio Platforms Software Developer Interview Questions and Answers

This question tests your understanding of data structures and algorithms through coding challenges.

• Understand the problem statement clearly before coding.

• Break down the problem into smaller, manageable parts.

• Choose the right data structure (e.g., arrays, linked lists) for the task.

• Optimize your solution for time and space complexity.

• Test your code with edge cases (e.g., empty arrays, large inputs).

Use binary search for optimal target finding in a sorted array.

• Ensure the array is sorted before applying binary search.

• Initialize two pointers: left at 0 and right at array length - 1.

• Calculate the middle index: mid = left + (right - left) / 2.

• If target equals array[mid], return mid as the target index.

• If target is less than array[mid], search the left half by setting right = mid - 1.

• If target is greater than arr...read more

Rolling hash is a hashing technique used in data structures and algorithms to efficiently compare substrings of text.

• Rolling hash is used in algorithms like Rabin-Karp string matching algorithm.

• It involves updating the hash value of a substring by removing the contribution of the first character and adding the contribution of the next character.

• It is useful for comparing substrings in constant time complexity.

A program to generate and print the Fibonacci series up to a specified number of terms.

• The Fibonacci series starts with 0 and 1.

• Each subsequent number is the sum of the two preceding ones.

• Example: For n=5, the series is 0, 1, 1, 2, 3.

• Can be implemented using iteration or recursion.

Synchronization in Java ensures that only one thread can access a shared resource at a time.

• Synchronization is achieved using the synchronized keyword in Java.

• It can be applied to methods or blocks of code.

• Example: synchronized void myMethod() { // code }

Multi threading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.

• Multi threading is achieved in Java by extending the Thread class or implementing the Runnable interface.

• Threads share the same memory space, allowing them to communicate and synchronize using methods like wait(), notify(), and notifyAll().

• Concurrency issues like race conditions and deadlocks can occur...read more

Rotate a linked list by K positions in a clockwise direction.

• Traverse the linked list to find the length and the last node.

• Connect the last node to the head to form a circular linked list.

• Find the new head by moving (length - K) steps from the original head.

• Break the circular list at the new head to get the rotated linked list.

Design a special stack that supports constant time operations like push, pop, top, and getMin.

• Use two stacks - one to store the elements and another to store the minimum values encountered so far

• When pushing, check if the element is smaller than the current minimum and update the minimum stack accordingly

• For pop, top, and getMin operations, simply access the top elements of the respective stacks

• Ensure to handle ca...read more