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Thursday, 4 June 2020

What is full form of google

Wha is the full form of Google

Full Form of Google
Here we are going to tell you What is full form of google. So let's see the full form of google or you can say long form of google.

Let's take a look of google full form in english.

G = Global
O = Organization
O = of Oriented
G = Group
L = Language
E = of Earth 

Basically, Google has not full form officially but it generally is known as "Global Organization of Oriented Group Language of Earth" i.e GOOGLE. Google's name generated from the word "googol" which means a huge number.

Here "googol" word represents a number that is 1 followed by 100 zeros.

After discussing google full form now We are going to discuss some information about Google Company.

What is Google Company? 

Google LLC is a multinational technology company of America that specializes in inter-related services and products which include search engines, cloud computing, online advertising technologies, hardware and software.

Google company was founded in September 1998 by Larry Page and Sergey Brin.



CEO of Google? 

The name of the CEO of Google company is Sunder Pichai.

So, Here we Discussed What is the full form of Google and what is google company and the ceo of the google.  

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Sunday, 8 April 2018

Struts Framework Interview Questions and Answers

Struts Interview Questions

Java Struts Interview Questions

 

Here we are going to see some important struts framework interview questions and answers which is mostly asked in advanced java or j2ee interviews.

Let's see one-by-one java struts interview questions and answers.


(1) What is Struts?

Struts is a framework which is used to create java based web application by using MVC design pattern.

Struts framework is an open source framework and extends servlet API.


(2) Which packages Struts framework use?

Struts framework use some package for developing web application e.g Java Servlets, Java Beans, XML, ResourceBundle, Jakarta packages.


(3) What is MVC?

MVC(Model View Controller) is a design pattern by using this we can design and develop the web application. 

Model represents the data and business logic. 

View used for presentation of the model.

Controller It takes the input from the user and acts as an interface between model and view. 


(4) What are the components of Struts?

There are 3 main components of the struts framework which is used to develop web applications and these are given below.

Model(java file) for containing state and business logic.

View(html, jsp, etc file) for presentation. 

Controller(Servlet or Filter) for handling request from the users.


(5) What is an Interceptor in Struts?

Interceptor is an object which provides the preprocessing and postprocessing logic before and after the action is called.


(6) What is a Configuration file in Struts?

Configuration file is a file in struts where we define action class component and view components and Interceptor also.


(7) What is struts.xml?

Struts framework provide struts.xml file which is called configuration file for mapping of an action class component and view components.


(8) What is multi-configuration in Struts?

In Struts, multi-configuration means we can use more than one .xml file for mapping e.g first.xml and second.xml, struts.xml but we have to define first.xml and second.xml in struts.xml configuration file.


(9) What is Value Stack?

Value stack contains application objects like action and other model objects.


(10) What is ActionInvocation?

It holds the action and interceptor and invokes the action.


(11) Can we create own interceptors in Struts?

Yes, We can create own interceptors in struts framework.


(12) How to create own or custom interceptors in Struts?

We can create own or custom interceptor in java struts framework by implementing Interceptor interface.

(13) What is POJO? 

POJO(Plain Old Java Object) class is simple a action class(java class).

(14) What is the role of Action class? 

An action class act as an adapter between the contents of an incoming request and the corresponding business logic that should be executed to process this request.


(15) What is ActionSupport?

In struts, ActionSupport is a class which implements Action, Validateable, Serializable etc interfaces and overrides execute() method of Action interface.


(16) What is Action?

Action is an interface with execute() method and 5 constants which is given below.

public static final String SUCCESS = "success"
public static final String ERROR = "error"
public static final String LOGIN = "login"
public static final String INPUT = "input"
public static final String NONE = "none"


(17) Why use execute() method?

In Struts , execute() method is used for business logic in action class.


(18) What is Zero Configuration?

Zero configuration means there is no need of configuration files like struts.xml etc. It is possible by using annotation or naming convention.


(19) What are the classes used as part of Struts framework?

There are some classes used in struts e.g Action Servlet, Action Class, Action Form, Action Mapping, Action Forward.


(20) What validate() and reset() method does?

Both methods are defined in the form bean. Validate method is used to validate the request parameter and reset method clear the action form data members.

Visit for more java interview Questions, link given below

Servlet Interview Questions.
JSP Interview Questions.
OOPS Interview Questions.
Top 10 Java Coding Interview Questions.

Here we discussed some most important Struts interview questions and answers in java. It will be useful to you. 


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Sunday, 1 April 2018

What is the difference between C++ and Java

Difference Between C++ and Java 

Difference Between C++ and Java Programming Language

Here we going to see what is the difference between C++ and Java Programming language. Both programming language are used for software development for different-different purpose.

Here we will discuss java vs c++ differences with point-to-point.

Let's start main differences between java and c++ programming language.


Java vs c++ is also important question for both core java interviews and c++ interviews .

C++ Programming Language

  • C++ was developed in 1979.
  • C++ is invented by Bjarne Stroustrup.
  • C++ is platform-dependent programming language.
  • C++ is mainly used for windows applicaton or system or desktop application.
  • C++ supports pointer concept.
  • C++ supports goto statement.
  • C++ supports multiple inheritance.
  • C++ supports structures and union concepts.
  • C++ requires explicit memory management.
  • C++ supports both call by reference and call by value.
  • C++ supports operator overloading concept.
  • C++ is compiled programming language.
  • C++ supports conditional inclusion e.g #ifdef, #ifndef.
  • C++ does not allow documentation comment.
  • C++ does not have built-in support for threads.

Java Programming Language

  • Java was developed in 1995.
  • Java is invented by James Gosling.
  • Java is platform-independent programming language.
  • Java is mainly used for web application, desktop application, mobile application and enterprise application.
  • Java does not supports pointer concept.
  • Java does not supports goto statement.
  • Java does not supports multiple inheritance through class but it can be possible by using interface concept in java.
  • Java does not support structure and union concepts.
  • Java provides automatic garbage collection for mamory mangement.
  • Java supports only call by value.
  • Java does not support operator overloading. Supports only method overloading and method overrding.
  • Java is both compiled and interpreted programming language.
  • Java does not support conditional compilationa and inclusion.
  • Java allows documentation comment.
  • Java provides built-in supports for threads.

Here we discussed main differences between java and c++ programming language one by one.


                    Difference between HashSet and HashMap in Java.
                    Difference between String and StringBuffer.
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Monday, 26 March 2018

Binary Search Program in Java

Binary Search in Java Program

Write a Java Program for Binary Search

Here we are gonna to see binary search program in java which is mostly asked in core java interviews.

Binary search is used to search specified element from the list of multiple elements. Binary search algorithm is a algorithm that find the position of a targate value within a sorted array. It compares the targate value to the middle element of the array.

Binary search is also known as half-interval search or binary chop or logarithmic search.

Let's see binary search java example.


Write a Java Program for Binary Search 

This is the simple implementation of binary search using java program. Here we are going to use Scanner class for taking input from the user e.g number of elements, values of elements, and key element for searching.

import java.util.Scanner;
class BinarySearchExample
{
public static void main(String args[])
{
int num, array[], counter, item, first, last, middle;

Scanner sc = new Scanner(System.in);
System.out.println("Enter number of elements");
num = sc.nextInt();

array = new int[num];//creating array and declare number of elements

System.out.println("Enter " +num+ " Elements ");

for(counter = 0; counter < num; counter++)
array[counter] = sc.nextInt();

System.out.println("Enter key element for searching ");
item = sc.nextInt();
first = 0;
last = num - 1;
middle = (first + last)/2;

while(first <= last)
{

if(array[middle] < item )
first = middle + 1;

else if(array[middle] == item)
{
System.out.println(item+ " found at location " + (middle + 1));
break;
}

else
{
last = middle - 1;
}

middle = (first + last)/2;
}

if(first > last)
System.out.println(item+ " not found");
}
}

Output: Enter number of elements
             5
             Enter 5 elements
             14
             65
             89
             91
             96
             Enter key element for searching
             89
             89 found at location 3

There is another way we can perform binary search operationg using java program.


Binary Search Example

This is another java program for binary search by using Arrays.binarySearch() method.

We have to import java.util.Arrays class.

import java.util.Arrays;
class BinarySearch2
{
public static void main(String args[])
{
int elements[] = {14, 65, 89, 91, 96};
int keyElement = 89;

int search = Arrays.binarySearch(elements, keyElement);
if(search < 0)
{
System.out.println(" Element not found ");
}
else
{
System.out.println(" Element is found at index " + search);
}
}
}

Output: Element is found at index 2

You can check other java programs, link given below

Linear Search Program in Java
Bubble Sort Program in Java 
Java Array Programming Interview Questions 

Here we discussed some most important binary search programs in java which will help you in java interviews.


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Sunday, 11 March 2018

JSP Interview Questions and Answers

Interview Questions and Answers on JSP

JSP Interview Questions and Answers

Here we are gonna to discuss some basic and important JSP interview questions and answers. JSP is the most important topic for advance java interviews.

So let's start frequently asked java jsp interview questions.


(1) What is JSP?

JSP is known as 'Java Server Pages'. JSP is a server-side programming language which is used to create dynamic web-pages just like servlet technology. We can use jsp for making web project. In other words, by using JSP technology we can create attractive websites.


(2) Is JSP extension of Servlet?

Yes, Jsp is an extension of servlet technology.


(3) JSP page internally converted into servlet, true of false?

Yes, It is 100% true. Jsp pages internally convert into servlet.


(4) What is life-cycle of jsp?

Jsp life-cycle given below.
  • JSP page translation : Jsp page translate into servlet.
  • JSP page compilation: After translated into servlet, servlet compilation will be performed.
  • Classloading: By the help of classloader .class file of servlet will load.
  • Instantiation of Servlet: Object of servlet will create.
  • Initialization: Container will call jspInit() method only once in this phase.
  • Request Processing : Container will call -jspService() method for each request.
  • Destroy: In the last phase, Container will call jspDestroy() method.

(5) How many life-cycle methods are of jsp?

There are 3 life-cyle methods of jsp.

  1. jspInit() method.
  2. _jspService(ServletRequest  req, ServletResponse res) method.
  3. jspDestroy() method.

(6) How many implicit objects in jsp?

there are 9 implicit objects in jsp which is given below.

  1. out
  2. request
  3. response
  4. session
  5. config
  6. page
  7. exception
  8. application
  9. pageContext

(7) How to dissable session in jsp?

We can dissable session in jsp by using <% @ page session = "false" %>.


(8) Define all scripting elements in jsp?

1) Scriptlet Tag

By using scriptlet tag we can easily execute java source code in jsp file.

Syntax :

<% java code %>

2) Expression Tag 

By using expression tag we can easily get the value of any variables and methods.

Syntax :

<%= statement %>

3) Declaration Tag

Declaration tag is used to declare the variables and methods.

Syntax :

<%! declaration of variable and method %>


(9) Define all the directives in jsp?

There are 3 kinds of directives.

Jsp directive is responsible how to convert jsp page into servlet.

  1. Page Directive.
  2. Include Directive.
  3. Taglib Directive.

(10) How to declare jsp directive?

The syntax is used to declaring jsp directive,

<%@ directive attribute = "value" %>

for example : <%@ page import = "java.util.date" %>


(11) Write some attribute of jsp page directive.

There are some page directive attribute given below.
  • import
  • extends
  • contentType
  • pageEncoding
  • errorPage
  • isErrorPage
  • session
  • autoFlush
  • buffer
  • language
  • info
  • isThreadSafe
  • isELIgnored

(12) How to insert a comment in jsp page?

We can insert comment in jsp page by using  <% - jsp comment -%>.


(13) Difference between include directive and include action.

There are some differences between include directive and include action which is given below.

Include Directive
  • Include directive is better for static pages.
  • Include directive includes the original page of the content.
  • At the page translation time, It includes the content.

Include Action
  • Include directive is better for dynamic pages.
  • Include directive does not include original content.
  • At the time of a request, It includes the content.

(14) Is that mandatory to configure jsp file in web.xml file?

No, It is optional. We can run web application without configuration of jsp file in web.xml file.


(15) What is the difference between JSP and Servlet?

There are many differences between JSP and Servlet.

JSP(Java Server Pages)
  • JSP is easy to learn.
  • JSP provides some predefine tags such scriptlet tag, custom tag, expression tag, etc.
  • There is no need to configuration of jsp file in web.xml file.
  • Both presentation and business logic are separated in jsp.
  • There is no need to recompile and redeploy of jsp file if we modify any jsp file.
  • JSP provides certain implicit objects.

Servlet
  • Servlet is not easy to learn.
  • Servlet does not provide any tags.
  • We have to configure servlet in web.xml file.
  • Both presentation and business logic are not separated in servlet.
  • If we modify and servlet then we have to recompile and redeploy the project.
  • Servlet does not provide implicit objects.

(16) What is expression language?

Expression language provides simple and easy to access the data from implicit objects and bean.


(17) What is JSTL?

JSTL stands for JSP standard tag library which is the collection of some useful core tags which make the software development easy and fast.

Visit : Servlet Interview questions and answers.
          OOPS Interview questions and answers.
          Java Multithreading Interview Questions.
          Java Collection Interview Questions.
          Struts Framework Interview Questions.
          Top 10 Java Programming Interview Questions for Fresher.

I hope, this java jsp interview questions and answers will help you in java interviews.

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