HCLTech Software Engineer Interview Questions, Process, and Tips

Q1. Core java,oops, multithreading,
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Java
DSA
Python
C++
Mern

Q1. Operating system Java Computer networking DBMS C++
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Q2. What you think About in company
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Q3. Who can handle any panic section
Ans. 
A person who remains calm and composed in high-pressure situations.
• Someone with strong problem-solving skills

• Ability to think clearly under pressure

• Experience in handling emergencies or crises

• Good communication skills to coordinate with others

• Examples: Emergency responders, crisis negotiators, experienced software engineers
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Q1. What is OOP in java?
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OOP in Java stands for Object-Oriented Programming, a programming paradigm that uses objects to design applications.
• OOP in Java involves creating classes and objects, encapsulation, inheritance, and polymorphism.

• Classes are blueprints for objects, defining their attributes and behaviors.

• Encapsulation hides the internal state of an object and only allows access through methods.

• Inheritance allows a class to inherit attri...read more
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Q2. Difference between array and arraylist?
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Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
• Array is a fixed-size collection of elements of the same data type.

• ArrayList is a dynamic-size collection of elements that can grow or shrink in size.

• Arrays can store primitive data types and objects, while ArrayList can only store objects.

• Arrays require a specified size during initialization, while ArrayList can dynamically r...read more
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Q1. What is Virtual Dom in Reac Js
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Virtual DOM is a lightweight copy of the actual DOM in React JS, used for efficient updates and rendering.
• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• When changes are made to the UI in React, the Virtual DOM is updated instead of the actual DOM.

• React then compares the Virtual DOM with the actual DOM and only updates the necessary parts, making the process more efficient.

• This...read more
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Q1. Why you want to join hcl
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Q1. Based on C programming
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Q1. Based on technical interview 2
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Q1. Difference between tcp and udp
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TCP is connection-oriented, reliable, and slower, while UDP is connectionless, unreliable, and faster.
• TCP is connection-oriented, meaning it establishes a connection before sending data.

• TCP is reliable, as it ensures all data is received in the correct order.

• TCP is slower due to the overhead of establishing and maintaining connections.

• UDP is connectionless, meaning it does not establish a connection before sending data...read more
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