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TCS iON Java Developer Interview Questions and Answers
20 Interview questions
Primitive data types are basic data types provided by Java, such as int, double, boolean, char, etc.
Primitive data types are predefined by the language and not objects
They are used to store simple values directly in memory
They have a fixed size and do not have any methods
Examples include int for integers, double for floating-point numbers, boolean for true/false values, char for characters
JIT stands for Just-In-Time compiler. It is a part of the Java Virtual Machine (JVM) that compiles bytecode into machine code at runtime.
JIT is responsible for improving the performance of Java applications by compiling frequently executed code into native machine code.
It analyzes the code at runtime and identifies the hotspots, i.e., the code that is executed frequently.
JIT compiles the hotspots into machine code...
Just-in-time (JIT) is a feature in Java that compiles bytecode into native machine code at runtime.
JIT improves the performance of Java programs by reducing the time needed for compilation.
JIT is enabled by default in most Java virtual machines.
JIT can be disabled using the -Xint option.
JIT can also be configured using various options such as -XX:CompileThreshold and -XX:MaxInlineLevel.
JVM stands for Java Virtual Machine. It is a virtual machine that executes Java bytecode.
JVM is responsible for running Java programs by interpreting bytecode.
It provides platform independence by executing bytecode on different operating systems.
JVM manages memory, performs garbage collection, and optimizes code execution.
It consists of various components like class loader, bytecode verifier, interpreter, and just...
Oops concept in java
Object-oriented programming paradigm
Encapsulation, Inheritance, Polymorphism, Abstraction
Classes and Objects
Access Modifiers
Interfaces and Abstract Classes
OOPs concepts in C++ include inheritance, polymorphism, encapsulation, and abstraction.
Inheritance allows a class to inherit properties and methods from another class.
Polymorphism allows objects to take on multiple forms.
Encapsulation hides the implementation details of a class from other objects.
Abstraction focuses on the essential features of an object and hides the unnecessary details.
Example: A car class can i...
Primitive data types in Java are basic data types that are not objects.
Primitive data types include int, double, float, char, boolean, byte, short, and long.
Examples: int num = 10; double price = 19.99; char letter = 'A'; boolean flag = true;
Java is considered object-oriented because it supports the four main principles of OOP: encapsulation, inheritance, polymorphism, and abstraction.
Java allows for the creation of classes and objects, which encapsulate data and behavior together.
Inheritance is supported in Java, allowing classes to inherit attributes and methods from other classes.
Polymorphism in Java allows objects to be treated as instances of the...
JVM stands for Java Virtual Machine, it is an abstract computing machine that enables a computer to run Java programs.
JVM is responsible for converting Java bytecode into machine code that can be executed by the computer's processor.
It provides a platform-independent execution environment for Java programs.
JVM manages memory, handles garbage collection, and provides security features for Java applications.
Examples...
JIT stands for Just-In-Time compiler in Java, which compiles Java bytecode into native machine code at runtime.
JIT compiler improves the performance of Java applications by compiling bytecode into native machine code on-the-fly.
It identifies and optimizes frequently executed code paths, resulting in faster execution.
JIT compiler is a part of Java Virtual Machine (JVM) and helps in achieving high performance withou...
TCS iON Java Developer Interview Experiences
13 interviews found
Anonymous
Selected
I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.
Duration is 1 hr and topic is core java
(2 Questions)
- Q1. What i sth OOPS
- Q2. What i s abstract class
I applied via Naukri.com and was interviewed in Apr 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Java 8 Questions were asked
- Q2. Explain stream api and lambda expression
(2 Questions)
- Q1. What is the salary expected
- Q2. Ho soon you can join
- Ans.
I can join immediately or within a week, depending on the onboarding process and any necessary arrangements.
Immediate availability: I can start right away if needed.
One-week notice: I may require a week to wrap up current commitments.
Flexible start date: I can adjust my start date based on your needs.
Skills evaluated in this interview
Apeksha Sonawane
I appeared for an interview before May 2024, where I was asked the following questions.
- Q1. Tell me about yourself?
- Q2. Why do you want to work with us ?
- Ans.
I admire your innovative projects and values, and I'm excited about contributing to your team's success with my Java expertise.
Your commitment to cutting-edge technology aligns with my passion for continuous learning.
I am impressed by your collaborative culture, which fosters teamwork and creativity.
The opportunity to work on impactful projects, like [specific project], excites me.
I appreciate your focus on professiona...
Selected
I applied via Company Website and was interviewed in May 2023. There were 4 interview rounds.
Quants,logical,verbal questions were asked in this round
Gd was held within 10 participants with a abstract topic
(3 Questions)
- Q1. Tell me about yourself and your key strength and weakness
- Q2. The rest of the interview was entirely filled with technical questions
- Q3. Data structures questions were asked
Interview Preparation Tips
Aryan Phadtare
English verbal, maths, logical questions
String,array,core java , oops
Interview Preparation Tips
Selected
I applied via Referral and was interviewed in Jan 2023. There were 3 interview rounds.
(4 Questions)
- Q1. What is a wrapper class in java
- Q2. Encapsulation with an example?
- Q3. What is the difference between hashmap and hashset
- Q4. What is the usage of optinal class
(1 Question)
- Q1. Just basic question tell me about yourself
Skills evaluated in this interview
Reasoning and quants
Coding test questions
Group discussion practice
Case study practice
(1 Question)
- Q1. Any type questions
(1 Question)
- Q1. Easy questions given
(2 Questions)
- Q1. Opps concepts hibernate
- Q2. Comparator comparable , spring boot
Interview Preparation Tips
I applied via Company Website and was interviewed in Jul 2022. There were 4 interview rounds.
Mathematical and logical questions
Based on coding and programming
(2 Questions)
- Q1. Oops concept in java
- Ans.
Oops concept in java
Object-oriented programming paradigm
Encapsulation, Inheritance, Polymorphism, Abstraction
Classes and Objects
Access Modifiers
Interfaces and Abstract Classes
- Q2. Oops concept in c++ programming language
- Ans.
OOPs concepts in C++ include inheritance, polymorphism, encapsulation, and abstraction.
Inheritance allows a class to inherit properties and methods from another class.
Polymorphism allows objects to take on multiple forms.
Encapsulation hides the implementation details of a class from other objects.
Abstraction focuses on the essential features of an object and hides the unnecessary details.
Example: A car class can inheri...
(3 Questions)
- Q1. What was your hobbies
- Q2. Tell about yourself??
- Q3. What role ur in interested in??
Interview Preparation Tips
Skills evaluated in this interview
I applied via Company Website and was interviewed in Nov 2022. There were 2 interview rounds.
(2 Questions)
- Q1. About your experience
- Q2. About your biggest strength
Interview Preparation Tips
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based on 11 interview experiences
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