Skip to main content

Java Fundamental Interview Question

Java Fundamental Interview Question:-

Test your Java Fundamental Skills


 Java Fundamental Question is the first impression of the interview, if you not answering this then it provides a bad impression to the interviewer during the interview because you know first impression is the last impression.

hence if you know very well advance skill and not know fundamental skills then you will never select in the interview.
now I am helping you to provide fundamental interview questions of java.


Q1)  What is Java?  Java is programming language or technology? initial stage Java was programming language?


Q2)  Explain System.out.println(), what is System, what is out, what is println()?

Q3)  How to take input from user's, explain System.in, what is Scanner class?, It is possible to take input without using Scanner class?


Q4) Explain public static void main(), what is public, what is static, what is void, what is main()?, what is String args[] in main(), can we change args identifier to hello.


Q5)  Without the main() class will compile or not, without main() class will execute or not?


Q6)  What is the difference between byte code and binary code, what is the difference between binary code and machine code? which code operating system will process?

Q7)  Java is 100% Object Oriented or not? if it is not then why explain it?


Q8)  What is the native library in Java, It will be linked after compilation,a execution or before compilation?


Q9) What is the Java language compiler?


Q10)  What is JIT, JVM, Java Interpretar, Java ClassLoader, Java Stack, Java Heap, BootStrap ClassLoader, JNI?


Q11)   What is the difference between Interpretuar and JIT?


Q12)  What is Class Area in JVM, explain the role of Class Area in JVM?


Q13)  What is explicit and implicit type conversion in Java, what is boxing and unboxing concept in Java?


Q14)  How operator has been defining in Java? using the native library or Java library?


Q15)  how to declare constant in java? the difference between static and final.final,  static both can be declared in the same variable?


Q16) what is instance type, static type variable in Java?


Q17)  If you have options based program then you will prefer if-else or switch statement, if switch statement then explain why?


Q18)  Nested switch is possible in java or not?


Q19)  We can write do--while under for loop and for loop under do--while loop?  when we use while loop in a program? which is the best loop while or for loop?


Q20)  What is the difference between break, continue statement?


Q21)  if you have 7 different values of the same type, you should 

calculate the sum of the all data then what you will prefer?


Q22)  What is a jagged array and multi-dimension array? where you will use Jagged array?


Q23)  Which is the latest version of Java?


Q24)  What is Java Framework, Why corporate use framework for java application development?


Q25)  What is the major difference between C++ and Java?


Q26)  JVM is platform dependent or platform-independent, Java is platform-independent or dependent?


Q27)  if we compile Java program form the Linux operating system then it will execute into the windows operating system?

Q28)  What is the Superclass of Java, What is the default package of Java, what is the default access modifier in Java?


Q29)  What is the major limitation of java Primitive data type?


Q30)  What is the major limitation of java Array?



If you want to submit an answer then write on a comment I will verify and remark your answer.




Comments

  1. 1. Java is a programming language .It is a high level ,robust,object oriented and secure programming language .I was developed by sun microsystem in 1995.

    ReplyDelete

Post a Comment

POST Answer of Questions and ASK to Doubt

Popular posts from this blog

Uncontrolled form input in React-JS

  Uncontrolled form input in React-JS? If we want to take input from users without any separate event handling then we can uncontrolled the data binding technique. The uncontrolled input is similar to the traditional HTML form inputs. The DOM itself handles the form data. Here, the HTML elements maintain their own state that will be updated when the input value changes. To write an uncontrolled component, you need to use a ref to get form values from the DOM. In other words, there is no need to write an event handler for every state update. You can use a ref to access the input field value of the form from the DOM. Example of Uncontrolled Form Input:- import React from "react" ; export class Info extends React . Component {     constructor ( props )     {         super ( props );         this . fun = this . fun . bind ( this ); //event method binding         this . input = React . createRef ();...

JSP Page design using Internal CSS

  JSP is used to design the user interface of an application, CSS is used to provide set of properties. Jsp provide proper page template to create user interface of dynamic web application. We can write CSS using three different ways 1)  inline CSS:-   we will write CSS tag under HTML elements <div style="width:200px; height:100px; background-color:green;"></div> 2)  Internal CSS:-  we will write CSS under <style> block. <style type="text/css"> #abc { width:200px;  height:100px;  background-color:green; } </style> <div id="abc"></div> 3) External CSS:-  we will write CSS to create a separate file and link it into HTML Web pages. create a separate file and named it style.css #abc { width:200px;  height:100px;  background-color:green; } go into Jsp page and link style.css <link href="style.css"  type="text/css" rel="stylesheet"   /> <div id="abc"> </div> Exam...

JDBC using JSP and Servlet

JDBC means Java Database Connectivity ,It is intermediates from Application to database. JDBC has different type of divers and provides to communicate from database server. JDBC contain four different type of approach to communicate with Database Type 1:- JDBC-ODBC Driver Type2:- JDBC Vendor specific Type3 :- JDBC Network Specific Type4:- JDBC Client-Server based Driver  or JAVA thin driver:- Mostly we prefer Type 4 type of Driver to communicate with database server. Step for JDBC:- 1  Create Database using MYSQL ,ORACLE ,MS-SQL or any other database 2   Create Table using database server 3   Create Form according to database table 4  Submit Form and get form data into servlet 5  write JDBC Code:-     5.1)   import package    import java.sql.*     5.2)  Add JDBC Driver according to database ide tools     5.3)  call driver in program         ...