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What are overloaded subprograms?
An overloaded subprogram is a subprogram that has the same name as another subprogram in the same referencing environment. A subprogram must be different from the others in the number, order, or types of its parameters, and possibly in its return type if it is a function.
What are the generic subprograms?
A generic subprograms is a subprogram which have parametric polymorphism. A generic subprogram can accept different types of values of same single memory location. Parametrically polymorphic subprograms are often called generic subprograms. C++ provide a kind of compile-time parametric polymorphism.
What are the two categories of subprograms?
PL/SQL has two types of subprograms called procedures and functions. Generally, you use a procedure to perform an action and a function to compute a value. Like unnamed or anonymous PL/SQL blocks, subprograms have a declarative part, an executable part, and an optional exception-handling part.
What is a generic subprogram explain with example?
Generics is the idea to allow type (Integer, String, … etc and user-defined types) to be a parameter to methods, classes and interfaces. For example, classes like an array, map, etc, which can be used using generics very efficiently. We can use them for any type.
Can subprograms be overloaded?
Overloading Subprogram Names. PL/SQL lets you overload subprogram names and type methods. You can use the same name for several different subprograms as long as their formal parameters differ in number, order, or datatype family. For an example of an overloaded procedure in a package, see Example 9-3.
Which feature enables to define different subprograms with the same name?
Overloading is the act of creating multiple subprograms – procedures or functions – with the same name.
What are the advantages of using subprograms?
Advantages to using subprograms They help keep the code simple, and, thus, more readable; They allow the programmer to use the same code as many times as needed throughout the program; They allow the programmer to define needed functions; and, They can be used in other programs.
Why are subprograms used?
Subprograms are small programs that are written within a larger, main program. The purpose of a subprogram is to perform a specific task. This task may need to be done more than once at various points in the main program.
What are the advantages of subprograms?
Benefits of using subprograms
- Subprograms are usually small in size, which means they are easier to write, test and debug than programs.
- Subprograms can be saved separately as modules and used again in other programs.
- A subprogram may be used repeatedly at various points in the main program.
Which of the following subprograms Cannot be overloaded?
You cannot overload subprograms whose parameters differ only in subtype. For example, you cannot overload procedures where one accepts an INTEGER parameter and the other accepts a REAL parameter, even though INTEGER and REAL are both subtypes of NUMBER and so are in the same family.
Are subprograms packaged with data eg in classes or stand alone?
Are subprograms packaged with data (e.g. in classes) or stand-alone? In JavaScript, subprograms are packaged with data. Class members inside function scope or class (ES6 feature) are stored within the scope.
What are the disadvantages of subprograms?
Disadvantages: Access to the formal parameters will be slower than pass-by-value, because of additional level of indirect addressing that is required. Inadvertent and erroneous changes may be made to the actual parameter.