What is overriding in mainframe?

JCL/PROC override is useful when a proc parameters, data sets needs to be modified while executing it. Adding parameters, Nullifying the existing parameters or Overriding the parameters of a PROC are the common overrides that can be done via a JOB.

What is meant by overriding a method?

In any object-oriented programming language, Overriding is a feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its super-classes or parent classes. Method overriding is one of the way by which java achieve Run Time Polymorphism.

How do I override a member in JCL?

The destination of one of the DD statement coded in the include member needs to be changed. This has to happen through a override in the JCL as the include member cannot be changed. 2. One entire step in the include member has to be eliminated from execution in the JCL.

Where method overriding is used?

Method Overriding is a feature that allows us to redefine the method in the subclass or derived class which is already defined in its parent class or superclass. In any object-oriented programming language, we can implement Method Overriding only when two classes have ‘Is-a’ relationship of inheritance between them.

Can we override the condition in JCL?

If COND coded at step level and the coded condition is false, system executes the step. COND parameter is used to override the system default sequence of execution. Bypassing the step based on the return code is not equal to terminating a step abnormally.

What is linkage section in Cobol?

LINKAGE SECTION defines the data items to receive the data from called program to the current program by using CALL. LINKAGE SECTION also defines the data items to receive the data from JCL through PARM operand. The data items should match the PIC clause declaration in both calling and called programs.

What is overriding give example?

Method Overriding Example We have two classes: A child class Boy and a parent class Human. The Boy class extends Human class. Boy class is giving its own implementation to the eat() method or in other words it is overriding the eat() method. The purpose of Method Overriding is clear here.

Why do we use overriding?

The benefit of overriding is: ability to define a behavior that’s specific to the subclass type, which means a subclass can implement a parent class method based on its requirement. In object-oriented terms, overriding means to override the functionality of an existing method.

How do I override a proc library in JCL?

Programmers can override the default specification by specifying a // JCLLIB PROCLIB or /*JOBPARM PROCLIB= statement in their JCL, and coding the name of the DD statement in the JES2 procedure that points to the library they want to use. For example, a programmer is running a job in class A.

What is overriding explain with an example?

Overriding is done so that a child class can give its own implementation to a method which is already provided by the parent class. In this case the method in parent class is called overridden method and the method in child class is called overriding method.