These Basic Interview Questions for Java freshers are specially designed for those who have completed their current studies and want to interview for any job. These are the basic interview Questions for Java freshers that will make it easier for you to succeed.
Interview Questions for java freshers
#1) What is Java?
Answer: Java is a general_purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible.
#2) What is the purpose of Java?
Answer: Java is used to create applications that run on a variety of platforms, from desktop computers to mobile devices. It is also used to create web applications and can be used to create embedded systems.
#3) What are the main features of Java?
Answer: Java is a platform-independent language, meaning it can run on any operating system. It is also object-oriented, which allows developers to create reusable code and helps them to create programs that are easier to maintain. Additionally, Java is secure, reliable, and efficient.
#4) What is the difference between Java and JavaScript?
Answer: Java is a programming language while JavaScript is a scripting language. Java is used to create applications while JavaScript is used to create websites and web applications.
#5) What is the Java Virtual Machine {JVM }?
Answer: The Java Virtual Machine (JVM) is a virtual machine that enables Java programs to run on any platform. It is responsible for executing Java bytecode and providing a runtime environment for Java applications.
#6) What is the Java Development Kit {JDK}?
Answer: The Java Development Kit (JDK) is a software development kit that contains the tools, libraries, and documentation needed to develop Java applications. It includes a compiler, a debugger, an interpreter, and other tools for creating and running Java programs.
#7) What is the Java Runtime Environment (JRE )?
Answer: The Java Runtime Environment (JRE) is a software package that provides the runtime environment for Java applications. It includes the Java Virtual Machine (JVM), the Java class libraries, and other supporting files.
#8: What is the Java Native Interface (JNI )?
Answer: The Java Native Interface (JNI) is a programming framework that enables Java code to call and be called by native applications or libraries written in other programming languages, such as C or C++.
#9) What is the Java Platform, Standard Edition (Java SE)?
Answer: The Java Platform, Standard Edition (Java SE) is a platform for developing and deploying Java applications. It includes the Java Runtime Environment (JRE), the Java Development Kit (JDK), and other tools for creating and running Java programs.
#10) What is the Java Platform, Enterprise Edition (Java EE)?
Answer: The Java Platform, Enterprise Edition (Java EE) is a platform for developing and deploying enterprise applications. It includes the Java Runtime Environment (JRE), the Java Development Kit (JDK), and other tools for creating and running enterprise applications.
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#11) What is Object_Oriented Programming?
Answer: Object-oriented programming is a programming paradigm that represents the concept of objects which have data fields and functions. This is different from procedural programming where data is stored in global variables and function calls are made into other procedures.
#12) What is Encapsulation in Java?
Answer: Encapsulation is a way of organizing data and behavior in an object. With encapsulation, the data is hidden from other parts of the program, and the implementation details are hidden from other objects.
#13) What is Java Applet?
Answer: Java applets are small programs written in the Java programming language that resides on a web page.
#14) What is Inheritance?
Answer: Inheritance is the process of creating a new class from an existing class.
#15) What are Literals?
Answer: Literals are used to indicate simple values in your Java programs.
#16) What is Operator Precedence?
Answer: Operator precedence is a system that determines the order in which mathematical operations are performed first.
#17) What are Calling methods in Java?
Answer: Calling methods in Java is a way of adding functionality to an object by invoking a method that is a part of the class or has been passed into the object.
#18) What are Casting Objects in Java?
Answer: Casting Objects in Java is a way of telling the compiler that you are referring to an object with a different type than it actually is.
#19) What are Java Class Libraries?
Answer: Java Class Libraries are a vast collection of pre-written code that you can use in your own Java programs. They are called libraries because the code is organized into subfolders, and each folder is a library of code for certain types of programming tasks.
#20) Block Statements in Java
A block statement is a section of code enclosed in braces. Block statements are used for creating local scopes for variables and for organizing your code into logical sections.