NTT Data Fullstack Java Developer Interview Questions and Answers

Q1. Java api calling from angular application and all security and integration related question.
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Q2. Project structure related question
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Q1. Project structure design patterns
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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.
Ans. 
Multithreading is a programming technique that allows concurrent execution of two or more threads for improved performance.
• Multithreading enables parallel execution, improving application responsiveness.

• Each thread runs independently, sharing the same memory space, which can lead to resource contention.

• Java provides built-in support for multithreading through the Thread class and Runnable interface.

• Example: A web serve...read more
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General aptitude, logical reasoning, english and Pseudocodes

Q1. Self introduction Project- details, role Programming- Variables, recursion, Features,Arrays, strings, write prime number program.
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Date -2 march 2023 ,Time 2-5pm , topics-Java

Q1. Tell me something about yourself.
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Q2. What is your Excepted salary?
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Q3. What is your greatest Strengths?
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Q4. Concept of Core-java & Advance-java
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Q5. Basic Interview Questions
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Q1. Java common question on hashmap, stream api
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Q1. Question related in resume skills and for company improvement knowledge
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Q2. Personal information
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4 senior interviewer in group discus

Online hackerrank test on Angular and Java

Q1. About project worked on
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Q2. Roles and responsibilities
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Q3. Problems faced in the project
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