Variable Scope

What is the scope of a global variable?

• The entire program

• The sub-program where it has been declared

• Only within the function where it has been declared

• Only within the class where it has been declared

Where is the value of a global variable accessible?

• Only within the function where it has been declared

• Only within the class where it has been declared

• Throughout the entire program

• Only within the sub-program where it has been declared

What is the impact of errors in code on global variables?

• No impact

• The value of the global variable is lost

• The value of the global variable can be accidentally changed

• The global variable becomes inaccessible

Why can global variables be a major problem in real commercial programs?

• They consume excessive system resources

• They can cause errors in code

• There may be hundreds or thousands of variables in use

• They are difficult to declare and use

What is the scope of a local variable?

• The entire program

• The sub-program where it has been declared

• Only within the function where it has been declared

• Only within the class where it has been declared

Where are the values of local variables held?

• In the main memory

• In the cache memory

• In the hard disk

• In the RAM

What happens to a local variable after the execution of its sub-program?

• It is retained in RAM

• It is lost

• It becomes a global variable

• It is moved to the cache memory

What is the advantage of using local variables?

• They consume less system resources

• They can be accessed from any part of the program

• They are easier to declare and use

• They have a wider scope

How many variables can be declared in a real commercial program?

• None

• A few

• Hundreds or thousands

• Unlimited

What is the main disadvantage of global variables?

• They are difficult to declare and use

• They consume excessive system resources

• They can cause errors in code

• They have a limited scope