HCL Technologies Interview Questions and Answers
Among India’s top 20 largest publicly traded corporations is HCL Technologies. If innovation and culture are important to you, HCL would be a great place to work. Here are the popular and frequently asked HCL Technologies interview questions and answers for beginners and experienced professionals. It includes both technical and HR interview questions.
HCL Recruitment Process
These four rounds typically make up the company’s selection procedure.
- Aptitude Assessment Round: These are online tests that take the form of multiple-choice questions. Typically, this round is only for freshers.
- Group Discussion: Teams are established and given a common debate or argument topic for this round. One might decide whether they wanted to discuss arguments in favor of or against the subject at hand.
- Technical Interview Round: In the technical round, questions pertaining to UNIX, LINUX, Java, C, and C++ are all possible. Being meticulous with your foundations would be a smart technique to help you win this round.
- HR Round: The recruiters ask broad inquiries in this round. They ask about your goals and aspirations in addition to the reasons you want to work for their organization.
HCL Technologies Technical Interview Questions and Answers for Freshers
1. Why is the finalize () function in Java important?
The finalize() method is what gives an object one more opportunity to clean up before the garbage collector takes it back. It entails releasing any held fixed order resources, cutting off an open connection, among other things.
2. What is AI?
Artificial intelligence (AI) is a technology used in computer science. It is used to create intelligent robots that can perform any task and behave like humans.
3. Are you aware of the purpose of programming languages?
Programming languages are indeed formal languages that allow many types of data to be encoded. That used to be the way programmers used computers.
4. What is SDLC?
The formal name for SDLC is Software Development Life Cycle. It’s a well-known process that produces high-caliber software solutions in a timely manner.
5. List a few well-known operating systems.
Microsoft, Linux, OSX, Windows, and other operating systems are some of the most popular ones.
6. What is thread, and how is it applied?
An execution thread is a route via a process’s code. It includes three components: a stack that stores the history of previous executions, system registers that retain the current working variables, and a program counter that tracks which instruction to run next.
7. How does one define a foreign key?
Foreign keys are a column or columns of data in one table that connect to the primary essential data in the original table.
8. What is a peek stack?
Java’s Stack. peek() function may be used to retrieve the first entry in the stack, or the element at the top. Neither is the retrieved element removed from the stack nor is it erased. Syntax: peek() STACK There is no need for parameters while using this method.
9. Which four foundations support the object-oriented programming system (OOPs)?
The following four principles support object-oriented programming systems, or OOPs:
- Inheritance: A property called inheritance allows one item to inherit part or all of the properties of another object.
- Abstraction is the process of picking out information from a larger pool so that it only displays the specifics of the item that are important.
- Encapsulation: Maintaining a private state for every object inside a class is the process of encapsulation.
- Polymorphism: To avoid type confusion, polymorphism allows a class to be used exactly like its parent.
10. What distinguishes an interpreter, compiler, and assembler from one another?
Compiler: The ability of a compiler to translate a whole high-level language program at once into machine language sets it apart from interpreters and assemblers.
Interpreter: Conversely, an interpreter translates high-level programs from one language to another, line by line.
Assembler: Machine language programs are translated from assembly language using an assembler.
HCL Technologies Interview Questions and Answers for Experienced
11. Explain init in Python.
“Init” is essentially an acronym for initialization. The function of init is to launch processes using the script that is kept in the configuration file. The initialization system will then use this. The constructors in Java and C++ are comparable to the __init__ method.
Example:
# init method or constructor
def __init__(self, name):
self.name = name
In the example above, the object will be initialized by passing the name as an argument to the __init__ method. A class instance is represented with the term self, which also ties the attributes to the supplied arguments.
12. In Java, how can one accomplish multiple inheritances?
Multiple interfaces must be implemented in a class to achieve multiple inheritances. In Java, a class can implement one or more interfaces. This does not lead to any uncertainty because every method declared in an interface is implemented in the class.
Example:
import java.io.*;
class Parent1 {
void fun() {
System.out.println(“Parent1”);
}
}
class Parent2 {
void fun() {
System.out.println(“Parent2”);
}
}
class Test extends Parent1, Parent2 {
public static void main(String args[]) {
Test t = new Test();
t.fun();
}
}
We have defined a method inside each of the parent classes in the example above. Because this class is inheriting more than one class, an error is raised when we use the expression “class Test extends Parent1, Parent2.”
13. Explain DBMS.
A program or instrument that aids in managing all of the organization’s data is the database management system (DBMS). Big data can be appropriately preserved and delivered as information when it’s needed to make business decisions.
Some characteristics of a database management system (DBMS) are as follows:
- Customization of databases.
- The simplicity of data management.
- Accessibility of data.
- Reduced redundancies.
- Relevance, Consistency, and Accuracy of Data.
- File coherence.
- Enhanced safety of data.
- Data organization.
Oracle, FileMaker, MySQL, PostgreSQL, and Microsoft Access are a few DBMS examples.
14. What does the term “big data” mean?
Big data refers to enormous amounts of data, as the term would imply. We now have access to enormous and sophisticated amounts of data from numerous web sites. It is quite difficult for traditional systems to process, analyze, and interpret the data in a way that makes sense. This is the point at which big data becomes relevant. Big data can be used to address a wide range of business issues, including machine learning, predictive maintenance, customer experience, and more.
15. What are SQL joins?
When using common columns and foreign keys to retrieve data from multiple tables as a single record, SQL joins are helpful. There are four primary types of joins:
- INNER JOIN: Records with matching values in both tables are returned.
- RIGHT (OUTER) JOIN: Returns all records that match those in the left table and the right table.
- LEFT (OUTER) JOIN: Returns all records matching the records from the right table and all records from the left table.
- FULL (OUTER) JOIN: Returns every record in the event that the left or right table matches.
16. What distinguishes a global variable from a constant variable?
A constant variable’s value is set and cannot be changed while the program runs. All functions within a program have access to and the ability to modify global variables.
Example
#include<stdio.h>
int m = 20, n = 40; //global variable
int a = 50, b = 80;//global variable
int main()
{
printf(“These are variables are accessed from main function”);
a=24;
void sample()
{
int t=20; // Local variable
}
}
17. Why is polymorphism used in Java?
Java requires polymorphism since the idea is heavily utilized to implement inheritance. It is essential to the sharing of the same external interface by objects with distinct internal structures.
Example:
class Vehicle{
void run(){System.out.println(“running”);}
}
class Bike extends Vehicle{
void run(){System.out.println(“running safely with 60km”);}
public static void main(String args[]){
Vehicle b = new Bike();
b.run();
}
}
The phrase “class Bike extends Vehicle” in the example above denotes inheritance within the class Vehicle. This allows for the creation of new internal structures inside the same external class.
Common HCL Technologies Interview Questions and Answers
18. Why would you like to work at HCL?
Sample Answer: HCL is a company that values culture and innovation. As an individual, I want to help the organization succeed while expanding my horizons. Moreover, I am greatly inspired by the company’s conviction in “ideapreneurship.” Having the chance to make recommendations for accomplishing the company’s goals thrills me.
19. As the team leader, how do you approach this issue when one of your team members is not working?
Sample Answer:
- When giving feedback, be supportive.
- Ask questions to find out if there are any underlying issues that individuals might be concerned about.
- If the problem is unconnected to work but has an impact on their performance there, make recommendations about how they might get help.
- To support staff members in re-engaging, goal-setting, skill development, or changing their job profile.
20. If this job requires you to learn a new computer language, what would you do?
Sample Answer: I’m always ready to learn new things. I’ve also studied some programming languages, such as Python, Ruby, SQL, C, C++, and C#. I think I’ll pick up the new language quickly for this job.
21. What aspects of this job appealed to you?
Sample Answer: As a programmer, I would be interested in working here. I think that by applying my skills and helping me grow in this field, my master’s programs are helping me.
Conclusion
We hope you have gained some knowledge through this article that contains HCL Technologies interview questions and answers. Gain expertise with technical and non-technical skills through our placement training institute in Chennai.
