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what type of variable is visible to every module and the entire program?
Wiki User
∙ 10y ago
If you are talking about a class in Java, a variable encapsulated by a class is called an instance variable b/c everytime you create an object with that class, each object has its own set of the variables declared.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoa global variable: a variable defined outside any functions, without keyword static.
Wiki User
∙ 12y agoIn C: static.
In Java there are no stand-alone variables.
Wiki User
∙ 13y agoPublic is the most visible access modifier. So, a variable or method that is declared public will be visible to the entire program.
Wiki User
∙ 14y agoA local variable
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Describe the differences between local and module-level variables?
local Variable A Local variable is a variable whose scope is limited to the Block of the Subroutine defining it. Private Sub Command1_Click Dim a as integer End Sub Module Level Variable A Module Level variable is a variable whose scope is limited to the Form Module defining it. Public Sub Command1_Click Dim a as integer End Sub Global Level Variable A Global Level variable is a variable whose scope can be limited to the entire project defining it. Private Sub Classjnitialize () Dim a As Integer End Sub
What is a local variable and What statements are able to access a local variable?
A local variable is a variable that can only be called on by the module. Where as a global variable can be called upon by any module. Only statements made inside the same module can call on a local variable.
How are coupling and cohesion related to modular design?
Ideally, modules will have low coupling and high cohesion. Coupling describes the strength of the connection between modules in a program. Loose (or low) coupling occurs when modules do not depend on other modules. One way to control this is by avoiding the use of global variables and reducing the number of variables that are passed between the modules. Another is to limit the depth of module calls (where a module calls another module, that then calls another module, and so on). Cohesion is a measure of how well a module accomplishes the module's purpose. High cohesion implies that all the module's internal statements serve to perform the module's (single) task. In order for modules to work together, there must be some connection between them. The nature of the connection is important because it determines the extent to which the modules are coupled. How are they connected? The best way to connect them is to pass the value of a local variable in one module to a second module through its parameter list. (A local variable is a variable that is defined within a module (not a parameter) is local to that module. The values of local variables are not available outside of the module in which they are declared unless they are passed. Local variables are reset to their default values once control leaves the module in which they are declared.) Another way to share information is through the use of global variables. (A variable that is defined outside of a module and that does not need to be passed to a module to be accessed by it is a global variable. Global variables retain their value once control leaves the module in which they are referenced. ) Because the value of a global variable can be changed by any module without passing, it increases the coupling between modules.
When a module is executing what happens when the end of the module is reached?
When a module is called, the computer jumps to that module and executes the statement in the module's body. Then, when the end of the module is reached, the computer jumps back to the part of the program that called the module, and the program resumes execution at that point.End
What relates to how much one module in a program must rely on another?
Linkage relates to how much one module in a program must rely on another
When passing an argument by reference the module can modify the argument in the calling part of the program?
Yes, when passing an argument by reference, changes to the argument made within the module will directly affect the original variable in the calling part of the program. This is because the reference to the original variable's memory address is passed to the module, allowing it to modify the variable directly.
What is meant by a static variable?
A static variable has load module lifetime. Its value persists until changed or the program exits. If the variable is at file scope, i.e. outside of any block, the word static means that it is visible only to code within that compilation unit, i.e. it can not be linked by other compilation units. In a C++ class, a static variable is common to all instances of the class.
Describe the differences between local and module-level variables?
local Variable A Local variable is a variable whose scope is limited to the Block of the Subroutine defining it. Private Sub Command1_Click Dim a as integer End Sub Module Level Variable A Module Level variable is a variable whose scope is limited to the Form Module defining it. Public Sub Command1_Click Dim a as integer End Sub Global Level Variable A Global Level variable is a variable whose scope can be limited to the entire project defining it. Private Sub Classjnitialize () Dim a As Integer End Sub
Analyze the difference among local module-level and global variables and explain how ActiveX DLLs are created?
Local Variable A Local variable is a variable whose scope is limited to the Block of the Subroutine defining it. Private Sub Command1_Click Dim a as integer End Sub Module Level Variable A Module Level variable is a variable whose scope is limited to the Form Module defining it. Public Sub Command1_Click Dim a as integer End Sub Global Level Variable A Global Level variable is a variable whose scope can be limited to the entire project defining it. Private Sub Class_Initialize () Dim a As Integer End Sub
What is a local variable and What statements are able to access a local variable?
A local variable is a variable that can only be called on by the module. Where as a global variable can be called upon by any module. Only statements made inside the same module can call on a local variable.
What happens to the value of a local variable when the module in which the variable is declared completes execution and control is passed to a different module?
The local variable goes away and the value is lost.
What is the difference between a global variable and a private variable?
The accessibility. The global one: almost everywhere in the code may reference to the global variable directly. The private variable, is private to the declaring module (class, method, assembly) only. Outside of that module has no access to it directly.
How are coupling and cohesion related to modular design?
Ideally, modules will have low coupling and high cohesion. Coupling describes the strength of the connection between modules in a program. Loose (or low) coupling occurs when modules do not depend on other modules. One way to control this is by avoiding the use of global variables and reducing the number of variables that are passed between the modules. Another is to limit the depth of module calls (where a module calls another module, that then calls another module, and so on). Cohesion is a measure of how well a module accomplishes the module's purpose. High cohesion implies that all the module's internal statements serve to perform the module's (single) task. In order for modules to work together, there must be some connection between them. The nature of the connection is important because it determines the extent to which the modules are coupled. How are they connected? The best way to connect them is to pass the value of a local variable in one module to a second module through its parameter list. (A local variable is a variable that is defined within a module (not a parameter) is local to that module. The values of local variables are not available outside of the module in which they are declared unless they are passed. Local variables are reset to their default values once control leaves the module in which they are declared.) Another way to share information is through the use of global variables. (A variable that is defined outside of a module and that does not need to be passed to a module to be accessed by it is a global variable. Global variables retain their value once control leaves the module in which they are referenced. ) Because the value of a global variable can be changed by any module without passing, it increases the coupling between modules.
A special variable that receives a piece of data when a module is called?
parameter
What is the term used for the variable that receives an argument that is passed into a module?
parameter
What is the term used for the variable that receives an argument that passed into a module?
parameter
What is the term used for the variable that receives an argument that pass into a module?
parameter
