iOPEX Technologies Interview Questions and Answers

Time complexity to add an element to a Singly Linked List is O(1) if added at the end using Tail pointer, and O(n) if added anywhere in the middle.

• Adding an element at the end of a Singly Linked List using the Tail pointer is a constant time operation, hence O(1).

• Adding an element anywhere in the middle of a Singly Linked List requires traversing the list to find the insertion point, resulting in a time complexity of O(n).

• For example, if we have a Singly Linked List with 5 el...read more

Optimizing JSON involves minimizing redundant data, using efficient data structures, and compressing data when necessary.

• Minimize redundant data by using references or IDs instead of repeating the same information multiple times.

• Use efficient data structures like arrays or dictionaries to store JSON data in a more organized and accessible way.

• Compress JSON data using techniques like gzip or deflate to reduce file size and improve loading times.

• Example: Instead of storing the ...read more

NextJs is a framework built on top of ReactJs, providing server-side rendering and other features for easier development.

• NextJs is a framework built on top of ReactJs, providing server-side rendering, routing, and other features for easier development.

• ReactJs is a JavaScript library for building user interfaces, while NextJs is a framework that adds functionality like server-side rendering and routing to React applications.

• NextJs simplifies the process of building React appli...read more

Yes, I prefer commuting to work by train for its reliability and eco-friendliness.

• I find commuting by train to be more reliable than other modes of transportation, as it is not affected by traffic congestion.

• Taking the train is also more eco-friendly compared to driving a car, as it reduces carbon emissions.

• Commuting by train allows me to relax, read, or work during the journey, making it a productive use of time.

Caching is the process of storing frequently accessed data in a temporary storage to improve performance.

• Caching reduces the need to fetch data from the original source, improving response time.

• It helps in reducing network traffic and server load.

• Caching can be done at various levels like browser caching, CDN caching, and server-side caching.

• Examples of caching include browser caching of website assets, CDN caching of static content, and database query result caching.

Reverse a linked list using multiple approaches.

• Iterative approach: Use three pointers to reverse the links between nodes.

• Recursive approach: Recursively reverse the rest of the list and adjust the links.

• Stack approach: Push all the nodes onto a stack and then pop them to create the reversed list.

Implement 2 stacks in an array

• Divide the array into two halves

• Use top1 and top2 to keep track of top elements of stacks

• Push and pop elements from respective halves

• Check for overflow and underflow conditions