Coforge Fullstack Java Application Developer Interview Questions and Answers

Q1. JVM related Questions
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Q2. Angular features
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Q3. React Features and how to deploy
Ans. 
React is a JavaScript library for building user interfaces. Deployment can be done using various methods.
• React features include virtual DOM, component-based architecture, JSX syntax, and state management.

• Deployment can be done using tools like Heroku, Netlify, AWS, or manually by building and serving static files.

• Continuous integration and deployment (CI/CD) pipelines can be set up to automate the deployment process.

• Se...read more
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Just some basic questions.

Total 6 questions. 4 basic and 2 advanced.

Q1. Write a program for Fibonacci?
Ans. 
Program to generate Fibonacci series using Java
• Use a loop to generate Fibonacci series

• Start with 0 and 1 as the first two numbers

• Add the previous two numbers to get the next number

• Repeat the process until the desired number of terms
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Q2. Write a code for inheritance ?
Ans. 
Inheritance in Java allows a class to inherit properties and behaviors from another class.
• Create a parent class with common properties and methods

• Create a child class that extends the parent class

• Child class can access parent class properties and methods
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Q1. SQL - a table with emp-id, emp-name, manager-id, Need to find the manger name for each emplyee.
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Q2. FizzBuzz - if number is divisible by 3 print "fizz", if by 5 print "buzz", if by both "fizzbuzz"
Ans. 
A simple program to print 'fizz' for multiples of 3, 'buzz' for multiples of 5, and 'fizzbuzz' for multiples of both.
• Iterate through numbers from 1 to n.

• Use modulo operator to check divisibility by 3 and 5.

• Print 'fizz', 'buzz', or 'fizzbuzz' accordingly.
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Q3. Is it necessary for classes implementing an interface to implement interface methods?
Ans. 
Yes, classes implementing an interface must implement interface methods.
• Classes implementing an interface must provide concrete implementations for all methods declared in the interface.

• Failure to implement all interface methods will result in a compilation error.

• Interfaces are used to define a contract that implementing classes must adhere to.
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Q4. Spring basics - annotations
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Q1. Spring boot basics
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Q1. Talked about my previous companies and salary. Before they conduct the interview I had told them my expectation, while negotiation they denied for providing that and were offering just 10% hike over my cur...read more
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What are Decorators?
Why to use decorators?
What is generator and itrator why to use generator insted of itrator?

Q1. How to read a file using inbuilt function in python?
Ans. 
Use the open() function to read a file in Python.
• Use the open() function with 'r' mode to open a file for reading.

• Use the read() method to read the contents of the file.

• Close the file using the close() method after reading.
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Ask 2 sorting techniques

1)Driffience between Abstract class &
Interface.
-abstract class
represents property
&
behaviour of an object
whereas
interface
represents
behaviour
of an object.
2)Driffience between equal() vs ==operator.
equal() is
an object class method
whereas
equal() of string class
override
the object class equal().
3)can we use pointer's in Java.
Not explicitly but implicitly we can use pointer's in java.
Dynamic m/m refers with help of pointer's but java does not support the pointer's.
when we r creating an object in java refrence varaible of an object holds the identity that is nothing but an implicit pointer that holds an unique identity of an object.
4)How we can print object ID.
-Object ID printed with help of object class which is a service provider class having 9().
5)what is object class.
-it is a super class of all predefined & userdefined class.
6)Write a prog to get name of main thread in java.
-class A
{
psvm(String args [])
{
s.o.pln(Thread.currentThread().getName());
}
}
7)length vs length()
-length
is
data menmber
of proxy class
whereas
length() is a string class().

Q1. Explain JVM in ur own language.
Ans. 
JVM is an abstract machine that executes Java bytecode.
• JVM stands for Java Virtual Machine.

• It is responsible for interpreting and executing Java bytecode.

• JVM provides platform independence to Java programs.

• It has its own memory management system and garbage collector.

• JVM can be implemented on different operating systems.

• Examples of JVM languages include Java, Kotlin, and Scala.
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Q2. Exlplaing Multhreading.
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Q1. It asked basics of Java related to OOPs pillar and DSA questions
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Q2. DSA linkedlist coding summary etc
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Q1. How are you now??
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Q2. Are you good now anymore??
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Probability, Logical Reasoning, etc.

4 Basic coding questions
You can choose any language you want to code from.
Questions like palindrome and string reverse were asked.

Q1. Asked about the project I had done.
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Q2. Comfortable with relocation
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