--%>
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 : What is an Attribute Attribute : It is

    Attribute: It is a particular usage of an instance variable. The set of attribute values held in a specific instance of a class state the current state of that instance. A class definition might impose specific constraints on the valid states of its i

    		•
  • Q : What is Super type Super type : It is a

    Super type: It is a type with a child sub type. The sub-type or super-type relationship is more common than the sub-class or super-class relationship. An interface which is implemented by the class is a super type of the class. The interface which is

    		•
  • Q : State the term New in XPath 2.0 State

    State the term New in XPath 2.0?

    		•
  • Q : Explain Synchronized statement

    Synchronized statement: It is a statement in which an object-lock should be obtained for the target object prior to the body of the statement and can be entered. Employed to enclose a critical section in order to save a race hazard.

    		•
  • Q : Define Livelock Livelock : It is a

    Livelock: It is a situation in which a thread waits to be notified of a condition however, on waking, finds that the other thread has inverted the condition another time. The primary thread is forced to wait again. Whenever this occurs for an indefini

    		•
  • Q : What is Static method Static method :

    Static method: The static method (also termed as a class method) is one with static reserved word in its header. The static methods vary from all other methods in that they are not related with any specific instance of the class to which they fit in.

    		•
  • Q : Explain Assignment operator Assignment

    Assignment operator: The operator (=) employed to store the value of an expression into the variable, for example: Variable = expression; The right-hand

    		•
  • Q : How XML web services integrate two

    How can XML web services integrate two legacy distributed systems, one based on Corba and one based on Java RMI?

    		•
  • Q : Write a program and estimate pi using

    Consider a dartboard of radius 1. Since the area of the board will be  π r2 = π * 1 *1, it's clear the area of the dartboard is exactly π. The area of a square surrounding the board (circumscribing it) would be 2*2 = 4, sin

    		•
  • Q : Define the term Internet Define the

    Define the term Internet: It is a global network of numerous interconnected networks.

    		•