HCL Infosystems Senior Associate Interview Questions and Answers

The first round is an aptitude online test that had Basics of Computer Science, Mathematics, English and then finally one basic program to code and compile like Palindrome.

Three panellists were present and it was a face-face round, Panellist 1 and 2 takes the technical discussions like classes, inheritance, oops concept, basic syntax, and such. Panellist 3 talks more about your resume skills, hobbies and the company overview.

Q1. What is Data Structure?
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Data structures are used to manage large amounts of data efficiently.

• They can be implemented using arrays, linked lists, trees, graphs, and other techniques.

• Examples include stacks, queues, hash tables, and binary search trees.

• Choosing the right data structure for a particular problem is important for op...read more
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Q2. Real time use of stack and Queue?
Ans. 
Stack and Queue are used in real-time systems for managing tasks and events.
• Stack is used for managing function calls, undo/redo operations, and backtracking.

• Queue is used for managing events, scheduling tasks, and buffering data.

• Real-time systems use both data structures for managing tasks and events in a time-sensitive manner.

• Examples include task scheduling in operating systems, event handling in GUI applications, a
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