--%>
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 Recursion Recursion : Recursion

    Recursion: Recursion outcomes from a method being invoked whenever an existing call to the similar method has not yet returned. For example:     public static void countDown(int n){  

    		•
  • Q : What is Logical error Logical error :

    Logical error: It is an error in the logical of a class or method. Such an error may not lead to an instant runtime error, however could have a noteworthy impact on overall program exactness.

    		•
  • Q : Define Formal argument Formal argument

    Formal argument: The definition of a method’s argument is the part of a method header. Each and every formal argument has an associated type. Whenever a method is called, the actual argument values are copied into the analogous formal arguments.

    		•
  • Q : Explain the term Portable Portable :

    Portable: The Portability is the quality of a program which makes it probable to run it on different kinds of computers. The programs written in low level languages are usually not very portable since they are generally closely tied to a particular in

    		•
  • Q : What is a Micro-chip Micro-chip : It is

    Micro-chip: It is a small electronic device employed to build computers and other electronic equipment. The chips are generally employed to supply the memory and processing components of the computer.

    		•
  • Q : Define the term Interprocess

    Define the term Interprocess communication: It is the ability of two or more separate processes to communicate with each other.

    		•
  • Q : Explain String String: It is an

    String: It is an instance of the String class. A string comprises of zero or more Unicode characters, and they are not mutable or immutable, once formed. The literal string is written between a pair of string delimiters ("), as:

    Q : Define the term Condition Define the

    Define the term Condition: It is a Boolean expression which controls a conditional statement or loop.

    		•
  • Q : Define Container Abstractions Container

    Container Abstractions: Abstractions for containers (such as lists, stacks, sets, or queues) may represent just the state of a container—e.g., full or empty—and abstract away from the actual container content. The list operations also need

    		•
  • Q : Define the term Runtime error Define

    Define the term Runtime error: It is an error which causes a program to finish whenever it is being run.

    		•