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DATA STRUCTURE-EFFICIENT WAY OF STORING DATA tccicomputercoaching.com

In computer science, a data structure is a particular way of collecting and forming data in computer in such away so that we can operate on them efficiently. Every enterprise application uses various types of data structures in one or the other way.

data-structure-simple

In simple language, Data Structures are structures programmed to store ordered data, so that various operations can be performed on it easily. It represents the knowledge of data to be organized in memory.

For example if we store data as name “Mira” and Percentage “75.5”, then record data name is string type and percentage is float type. Record stored is student name with percentage. We can also store with Roll-No (Integer).

There are various types of data structures, generally built upon simpler primitive data types.

Arrays, Stack, Queue, Link List, Tree, Graph etc…..

Data Structure Language contains following topics at TCCI:

Introduction, Algorithms, Time and Space Complexity, Array, Stack, Queue, Link List, Tree, Graph etc……

Course Duration:Daily/2 Days/3 Days/4 Days

Class Mode:Theory With Practical

Learn Training:At student’s Convenience

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What are the types of Inheritance? tccicomputercoaching.com

Types of Inheritance in C++

A class can inherit properties from one or more classes and from one or more levels.

types-inheritance-simple

On the basis of this concept, there are five types of inheritance.

Single Inheritance

In single inheritance, a class is derived from only one base class.

Multiple Inheritance

In this inheritance, a class is derived from more than one base class.

Hierarchical Inheritance

In this type, two or more classes inherit the properties of one base class.

Multilevel Inheritance

The mechanism of deriving a class from another derived class is known as multilevel inheritance. The process can be extended to an arbitrary number of levels.

Hybrid Inheritance

This type of inheritance includes more than one type of inheritance

To learn more about Inheritance  , C++ , Programming .

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Why Learn Coding? tccicomputercoaching.com

Learning to code is important. It’s important to know how the technology around you works.

coding-simpleIt benefits society if as many people could grow up to be thinking adults. Computer programming forces one to think in a logical manner to get the program working as computers are just machines with no intelligence whatsoever unless we program the logic into them.

With coding (at least I think so) you can make things work (even if it is just displaying Hello World at the beginning). You can learn and improve your craft everyday.

The computer program tells the machine what to do. As technology continues to advance, every machine will need a computer program that will operate the hardware to function. Without the computer program, all you have is the hardware by itself. In order for humans to interact with a machine such as the one you used …

TCCI make you learn coding in very efficient way. We conduct many courses in Bopal and Satellite in Ahmedabad. We provide Online Computer Coaching also.

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Learn Programming Course AT TCCI tccicomputercoaching.com

Computer programming is set of instructions to perform certain task.

learn-programmimg-smiple

Computer programmers work under an assortment of titles, including system analyst, Web programmer and application programmer.

In present days Computer technology advances at a fast rate, keeping the demand for computer programmers at a high level. If you want high pay then talent of programming will be very useful in getting higher salary job.

There are various programming course you can choose as per your interest like .Net technology, Java, Python, PHP, C,C++,Data Structure, HTML, SQL etc………

Programming is difficult, but not impossible. You’ll be able to create a few simple programs within days.

TCCI-Tririd Institute provides you training for all of these courses in Bopal and Satellite in Ahmedabad.

You can take advantage of our courses at minimal charges at any time.

Course Duration:Daily/2 Days/3 Days/4 Days

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Learn Training:At Student’s Convenience

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Why Learn Coding? tccicomputercoaching.com

Learning to code is important. It’s important to know how the technology around you works.

Learn_coding-infographic

It benefits society if as many people could grow up to be thinking adults.

============================

Computer programming forces one to think in a logical manner to get the program working as computers.

==========================

The computer program tells the machine what to do.

==============================

TCCI make you learn coding in very efficient way. We conduct many courses in Bopal and Satellite in Ahmedabad. We provide Online Computer Coaching also.

====================

For more information about TCCI.

Call us @ 98256 18292.

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What is wrapper class in Java? tccicomputercoaching.com

Wrapper classes provide a way to use primitive data types (int, boolean, etc..) as objects.

Advance java

The eight primitive data types byte, short, int, long, float, double, char and boolean are not objects, Wrapper classes are used for converting primitive data types into objects, like int to Integer etc.

For example , The Integer is a wrapper class of int primitive type.

The wrapper objects hold much more memory compared to primitive types. So use primitive types when you need efficiency and use wrapper class when you need objects instead of primitive types.

public class test{

public static void main(String args[]){

//Converting int primitive into Integer object

int a=100;

Integer obj=Integer.valueOf(a);

System.out.println(a+ ” “+ obj);

}

}

Output:

100 100

TCCI can help student to grasp such an important topics very well.

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Servlet Life Cycle- Tcci.com

A servlet life cycle can be defined as the entire process from its creation till the destruction. The following are the paths followed by a servlet.

10-best-java-web-frameworks-for-2018

  • load or instantiation
  • The servlet is initialized by calling the init()
  • The servlet calls service()method to process a client’s request.
  • The servlet is terminated by calling the destroy()
  • Finally, servlet is garbage collected by the garbage collector of the JVM.

Now let us discuss the life cycle methods in detail.

1.Instantiation: 

– At the time of starting the web container, it searches for the deployment descriptor (web.xml) for every web application.
– Once the servlet is found in the deployment descriptor, the container creates an instance of the Servlet class, which is considered as the loading of the servlet class.

The init() Method

The init method is called only once. It is called only when the servlet is created, and not called for any user requests afterwards. So, it is used for one-time initializations, just as with the init method of applets.

The servlet is normally created when a user first invokes a URL corresponding to the servlet, but you can also specify that the servlet be loaded when the server is first started.

The init() method of GenericServlet class is invoked by the HttpServlet class which is the sub class of the GenericServlet, meaning that the HttpServlet inherits the init() method of GenericServlet.

– The init() method performs some specific actions like a constructor of a class which initializes an instance at the start up.

– It is automatically be invoked by the servlet container.

– This action causes the parsing by the application context (web.xml).

– The init() method is overloaded with zero parameters and with a parameter that takes a ServletConfig parameter.

– The init() method is invoked only once when the servlet is first loaded.

When a user invokes a servlet, a single instance of each servlet gets created, with each user request resulting in a new thread that is handed off to doGet or doPost as appropriate. The init() method simply creates or loads some data that will be used throughout the life of the servlet.

The init method definition looks like this –

public void init() throws ServletException {

// Initialization code…

}

The service() Method

The operations of a servlet is performed by the service () method.

– This method has HttpServletRequest and HttpServletResponse parameters.

– The service () method is invoked by the container and is called for each request processed.

– By default the method returns / dispatches the requests to the appropriate methods, usually a developer’s overridden helper methods such as doGet() and doPost().

The service() method is the main method to perform the actual task. The servlet container (i.e. web server) calls the service() method to handle requests coming from the client( browsers) and to write the formatted response back to the client.

Each time the server receives a request for a servlet, the server spawns a new thread and calls service. The service() method checks the HTTP request type (GET, POST, PUT, DELETE, etc.) and calls doGet, doPost, doPut, doDelete, etc. methods as appropriate.

Here is the signature of this method –

public void service(ServletRequest request, ServletResponse response)

throws ServletException, IOException {

}

The service () method is called by the container and service method invokes doGet, doPost, doPut, doDelete, etc. methods as appropriate. So you have nothing to do with service() method but you override either doGet() or doPost() depending on what type of request you receive from the client.

The doGet() and doPost() are most frequently used methods with in each service request. Here is the signature of these two methods.

The doGet() Method

A GET request results from a normal request for a URL or from an HTML form that has no METHOD specified and it should be handled by doGet() method.

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// Servlet code

}

The doPost() Method

A POST request results from an HTML form that specifically lists POST as the METHOD and it should be handled by doPost() method.

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// Servlet code

}

The destroy() Method

The destroy() method is called only once at the end of the life cycle of a servlet. This method gives your servlet a chance to close database connections, halt background threads, write cookie lists or hit counts to disk, and perform other such cleanup activities.

After the destroy() method is called, the servlet object is marked for garbage collection. The destroy method definition looks like this –

public void destroy() {

// Finalization code…

}

Architecture Diagram

The following figure depicts a typical servlet life-cycle scenario.

  • First the HTTP requests coming to the server are delegated to the servlet container.
  • The servlet container loads the servlet before invoking the service() method.
  • Then the servlet container handles multiple requests by spawning multiple threads, each thread executing the service() method of a single instance of the servlet.

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