--%>
Assignment Help - homework help

Explain Global variable

Global variable: It is a phenomenon which is more generally regarded as being a trouble in structured programming languages than in object-oriented languages. In structured programming language, like C or Pascal, a global variable is one stated outside the procedures and functions of a program. This is hard to keep track of the usage of this variable as it is readable and writable by the entire program or module in which it is stated. This makes these variables a general source of logical errors. However, instance variables pose a similar trouble within class definitions, as Java's scope rules make them available to all methods stated within a class. This is one of the reasons why we favor to channel access to instance variables via accessor and mutator techniques even in a class.

   Related Questions in Programming Languages

  • Q : Explain If-else statement If-else

    If-else statement: It is a control structure employed to select between performing one of two alternative events.     if(boolean-expression){        // Statem

    		•
  • Q : What is no-arg constructor no-arg

    no-arg constructor: It is a constructor which takes no arguments. By default, each and every class without an explicit constructor has a default no-arg constructor with the public access. Its role is entirely to invoke the no-arg constructor of the in

    		•
  • Q : Define Hardware Hardware : It is the

    Hardware: It is the physical devices of a computer system, like its micro-chips, keyboard, disk drives, printer, sound card, and so forth. It is termed `hardware' in contrary to programs, which are termed `software'.

    		•
  • Q : What is the way to use XForms What is

    What is the way to use XForms?

    		•
  • Q : What is an Interrupt Interrupt : This

    Interrupt: This is an asynchronous message sent to a process or thread which interrupts what it is at present doing. This generally outcomes in an InterruptedException object being received by an interrupted thread. Waiting for an int

    		•
  • Q : What is an Exception Exception : An

    Exception: An object symbolizing the occurrence of an exceptional circumstance - usually, something which has gone wrong in the smooth running of a program. Exception objects are made from classes which expand the Throwable class.

    		•
  • Q : What is MIME MIME : Multipurpose

    MIME: Multipurpose Internet Mail Extensions (abbreviated as MIME) are rules which make it possible to utilize electronic mail to send content other than the simple text.

    		•
  • Q : Image reconstruction in CT using MATLAB

    What is Image reconstruction in CT using MATLAB?

    		•
  • Q : Explain the CPU scheduling decisions

    Explain the CPU scheduling decisions.

    		•
  • Q : BAT files and shell scripts Using the

    Using the Web as a resource for your investigation, find out and explain what BAT files and shell scripts contain, and what they are used for. In the light of your findings, discuss why an operating system would provide both a graphical user interface

    		•