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What is memory management? tccicomputercoaching.com

Memory management is a form of resource management applied to computer memory. The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and free it for reuse when no longer needed.

Memory managment

Why memory management needed?

During Programme execution memory allocation is needed and when a program no longer needs memory should be free so, those blocks become available for reassignment.

There are following types of memory management:

  • Static vs Dynamic Loading. …
  • Static vs Dynamic Linking. …
  • Swapping. …
  • Memory Allocation. …
  • Fragmentation. …
  • Paging. …
  • Segmentation.

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What are the differences between Python and Java memory management? tccicomputercoaching.com

To understand differences between java and python in context of memory,

Let us take one example.

In Java language, when we declare a variable, data type is needed.

For example, float x=12.5

JAVA vs python

 

Here, memory of 4 bytes allocated first, then variable x assigned to that memory and value 12.5 stored in the memory.

In Python, x=12.5 means first 12.5 object is created and then variable x is labelled to the x.

Python uses reference counting to free objects as soon as they have no references. This means most of the time everything is cleaned up by reference counting and GC never kicks in. There is also usually no need to tune various GC parameters as in Java.

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What is httpservletRequest and Response? tccicomputercoaching.com

What is HTTP servlet in Java?

Servlets are Java classes which service HTTP requests and implement the javax.servlet.Servlet interface. Web application developers typically write servlets that extend javax. servlet.http.HttpServlet, an abstract class that implements the Servlet interface and is specially designed to handle HTTP requests.

Http

What is httpservletRequest and Response?

httpservletRequest:

Blueprint of an object to provide client request information to a servlet. The servlet
container creates a ServletRequest object and sends it as an argument to the servlet’s service method.

httpservletResponse

Defines an object to assist a servlet in sending a response to the client. The servlet container creates aServletResponse object and passes it as an argument to the servlet’s service method.

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What is difference between servletconfig and servletcontext? tccicomputercoaching.com

Purpose:

The ServletConfig parameters are specified for a particular servlet and are unknown to other servlets. It is used for intializing purposes.

The ServletContext parameters are specified for an entire application outside of any particular servlet and are available to all the servlets within that application. It is application scoped and thus globally accessible across the pages.

Advanced java differnece

No. of Object:

There is one ServletConfig parameter per servlet.

There is one ServletContext for the entire webapp and all the servlets in a webapp share it.

When created?

Object of ServletConfig will be created during initialization process of the servlet.

Object of ServletContext will be created at the time of web application deployment.

Scope:

As long as a servlet is executing, ServletConfig object will be available, it will be destroyed once the servlet execution is completed.

As long as web application is executing, ServletContext object will be available, and it will be destroyed once the application is removed from the server.

Availabiltity:

We should give request explicitly, in order to create ServletConfig object for the first time.

ServletContext object will be available even before giving the first request

Appearance in Web-xml

In web.xml – <init-param> tag will be appear under <servlet-class> tag.

In web.xml<context-param> tag will be appear under <web-app> tag.

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Computer Course Coaching – tccicomputercoaching.com


TCCI Computer Institute 
is dedicated to helping educate users on computer-related topics. Our Computer training professionals instruct and help our students acquire proficiency in a wide array of areas, including various programming Languages, software development technology, database management, Engineering syllabus, networking and more.

Computer coaching TCCI

In Corporate training our expert come to your place for group training and follow up at your desk while you do your work!

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Best Computer Coaching Near to you – tccicomputercoaching.com

At present there is no work without computer everything had became online, digital. So knowledge about the computer is must for every individual. In order to work out excellence in your job first you need to have the proper understanding the software’s used in the computer system. You should be able to identify it’s parts, how they are helpful to you in your work progress. So you need to look after the perfect coaching class to learn them.

Computer coaching near you TCCI

TCCI is Best Computer Coaching in Ahmedabad. We offer different types of courses to school students, college students , Employees, Housewives, senior citizen and any person.

Our Faculties provide clear and simple understanding lectures to the students. Which help them to grasp the concepts easily. Our institute is located in Bopal and Satellite in Ahmedabad. We provide online coaching which makes very easy journey for remote location students.

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What is servlet in java? tccicomputercoaching.com

Definition:

Servlets are just a common technology for server-side Java work.

How Servlet works?

The servlet can provide the HTML to display the form and also act on the submission. Servlets can also be used to implement web services.

java servlet

A servlet is simply a class which responds to a particular type of network request – most commonly an HTTP request. Basically servlets are usually used to implement web applications – but there are also various frameworks which operate on top of servlets (e.g. Struts) to give a higher-level abstraction than the “here’s an HTTP request, write to this HTTP response” level which servlets provide.

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