HCL Interview Questions and Answers

Last updated on Feb 06, 2023
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HCL Interview Questions

These days the technology is making advancement in every area so it is just your requirement how updated you want to be or do you still want to work in the traditional way as it is going on. Because following the traditional way is not a crime at all. But doing that you will be wasting a lot of time without computer systems and digital interference these days the work gets really slow. Below all the HCl interview process are defined. Please go through. Now if you believe you are a real business firm holder then you must also value time and for that installation of a digital platform is really necessary for your business or your company.

The demand for candidates with computer systems knowledge is really high. Every MNC’s wants to hire such candidates, these candidates are really a gem to the company who will be working with their dedication to the company. And will be managing the data and important information about the company. But those candidates who are willing to apply for the interview which is held by these MNCs are not sure about the questions which the interviewer is going to ask the candidate. So today we will discuss here certain HCL interview questions that could be asked at the interview round.

HCL Interview Process

HCL Recruitment for Freshers is an extensive system consisting of four rounds. Remember that all these rounds are very vital for your success in HCL Recruitment. These rounds for HCL Selection Process are commonly held inside a span of 2 days however would possibly differ for some colleges. In HCL recruitment 1st two rounds are an elimination round.

  • Aptitude Test
  • Group Discussion(GD)
  • Technical Interview
  • HR Interview

Most Frequently Asked HCL Interview Questions

Here in this article, we will be listing frequently asked HCL Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q1. State the basic concepts of OOPS?

The basic concept of OOPs are:

1. Inheritance- It is a mechanism in which a new class is obtained from an already existing class. As in Java, classes can inherit or procure the attributes and methods/processes of other classes. Thus a class that is procured from another class is known as a subclass, on the other hand, the class with the help of which a subclass is procured is known as a superclass.

2. Abstraction- This is among the significant concepts of the OOP (object-oriented programming) languages. The main goal of this is to manage complexity by suppressing irrelevant details from every user. Because of this, the user can implement more complicated logic on the head of the rendered abstraction without knowing or even considering all the unknown complexity.

3. Encapsulation- It can be employed to hide the data members along with member functions. This is to say that encapsulation implies that an internal representation of the object is usually hidden from a display outside of the definition of an object. Typically, particularly the object's personal methods can undeviatingly inspect or manage its fields.

Q2. What is polymorphism?

It is a really unique thing where it is the ability of it to create many multiple forms through just one use of a function. Because by its name it simply denotes where poly means many or multiple times and morphism means forms. So the main function of it in Java language is to process different types of classes and objects through a single piece of interface that makes it unique.

Q3. What is basically a servlet?

Servlets are basically something that improves the ability or build the dynamic experience of the server platform.

Q4. What are applets?

This is to enhance the ability of the user experience through the client platform itself.

Q5. What is the difference between the JVM, JRE, and JDK?
This is the heart of the programming language, Java. JRE is used for running all the programs of Java. It is used for the purpose of development.
It renders platform independence. JRE contains JVM. JDK also contains JVM.
It provides the core functions of Java. JVM is implemented by JRE. It provides the platform to execute the Java programs. It is a core component of the programming language, Java.
It is customizable. JRE does not possess any sort of development tools. It is a platform-specific type of software.
It creates the programs of type- write-once-run-anywhere. JRE is mandatory to run any program of Java. JDK is a superset of JRE as it contains JRE in it.
Q6. What is DBMS?

The Database management system (DBMS), is basically a tool or say a software tool which helps in managing the data of the entire company. Now, this massive amount of data is stored properly and can be presented as information when required to take further decisions.

Q7. Does every class require a constructor?

Yes obviously every class does require a constructor. The main function of the constructor is to initialize an object which is known as the object initialization process. Thus every class requires the need for the presence of a constructor in it.

Q8. What is the difference between the static and the instance method?

Static Method: The function of the static method cannot be overridden because it is bounded within the class. It actually belongs to the class and area.

Instance Method: Whereas the instance method is basically bounded with the object and also it belongs to the heap area.

Q9. What is actually a singleton class?

It has basically the function where it allows or gives access to create a single object but also it has unique flexibility where if it is required, multiple numbers of objects can also be created.

Q10. Difference between primary key and a unique key?

Primary Key: In the need of a primary key there must be at least one key at the table and with the use of this key it helps in blocking the duplicate and the also the null value.

Unique Key: Whereas, in the unique key process, there can be more than one key in the table and here it will block the duplicated value and will rather accept the null value.

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