Deck 7: Modularity Using Functions: Part II

Question 1

C functions are constructed to be independent modules.

Answer 1

True

Question 2

Variables created inside a function are available only to other functions in the same C file.

Answer 2

False

Question 3

Global variables are only meaningful when used in expressions or statements inside the function that declares them.

Answer 3

False

Question 4

The same variable name cannot be declared and used in more than one function.

Question 5

Global variables can be used by all functions in a program that are physically placed after the global variable declaration.

Question 6

While a function is executing, only the storage area for the variables and parameters created by this function are automatically accessed.

Question 7

The scope of a variable influences or restricts the data type of the variable.

Question 8

The scoping rules for symbolic constants and function prototypes are the same as those for variables.

Question 9

Except for symbolic constants and function prototypes, local variables should almost never be used.

Question 10

Using global variables except in very restricted and well-defined situations is a sign of extremely bad programming.

Question 11

The scope of a variable can be thought of as the space within the program where the variable is valid.

Question 12

Storage for automatic local variables is automatically reserved (that is, created) before the program begins its execution.

Question 13

As long as a function has not returned control to its calling function, all automatic variables local to the function are "alive"; that is, storage for the variables is available.

Question 14

Once created, local static variables remain in existence for the life of the program.

Question 15

The initialization of static variables (both local and global) is done only once, when the
program is first compiled.

Question 16

Unlike automatic variables that can be initialized by either constants or expressions using both constants and previously initialized variables, static variables can only be initialized using constants or constant expressions.

Question 17

You can take the address of a register variable using the address operator &.

Question 18

Initialization within an extern declaration statement is not allowed and causes a compilation error.

Question 19

The scope of a global static variable can be extended beyond the file in which it is declared.

Question 20

Passing an address is referred to as a function pass by reference, because the called function can reference, or access, the variable using the passed address.

Question 21

When using a pointer variable, the value that is obtained is always found by first going to the pointer for an address; this is called indirect addressing.

Question 22

The default in C is to make calls by reference to limit a called function's ability to alter variables in the calling function.

Question 23

When the values of two variables are affected in a function, the function cannot be written as a call by value function.

Question 24

Pointers can be used to change constants.

Question 25

Self-referential functions are also called recursive functions.

Question 26

A memory stack is simply an area of memory used for rapidly storing and retrieving data.

Question 27

Some (but not all) recursive functions can be written in a nonrecursive manner using an iterative solution.

Question 28

A variable with a ____ scope is simply one that has had storage locations set aside for it by a declaration statement made within a function body.

A)function
B)module
C)local
D)global

Question 29

The variable secnum is ____.
Int main()
{
Int secnum;
) . .
}

A)local to main()
B)global to main()
C)local to the program
D)global to the program

Question 30

Coding a function prototype as ____ makes sense when the function is used by a number of other functions in a source code file.

A)private
B)global
C)local
D)void

Question 31

____ variables allow the programmer to "jump around" the normal safeguards provided by functions.

A)Global
B)Local
C)Static
D)void

Question 32

The ____ of a variable defines the location within a program where that variable can be used.

A)storage class
B)time dimension
C)scope
D)data type

Question 33

The four available storage classes are called auto, static, extern, and ____.

A)stack
B)intern
C)void
D)register

Question 34

____ can only be members of the auto, static, or register storage classes.

A)Constants
B)int variables
C)Local variables
D)Global variables

Question 35

If no class description is included in the declaration statement of a local variable, the variable is automatically assigned to the ____ class.

A)auto
B)static
C)extern
D)register

Question 36

When the function returns control to its calling function, its ____ variables "die".

A)local static
B)extern
C)local extern
D)local auto

Question 37

In ____ initialization, initialization occurs each time the declaration statement is encountered.

A)dynamic
B)static
C)compile-time
D)run-time

Question 38

____ variables have the same time duration as automatic variables.

A)Static
B)Register
C)Extern
D)Global

Question 39

____ is a high-speed storage area physically located in the computer's processing unit.

A)A reserved variable
B)RAM
C)A register
D)A stack

Question 40

____ variables may be declared as members of the static or extern storage class.

A)Local
B)Global
C)Automatic
D)Register

Question 41

The purpose of the ____ storage class is to extend the scope of a global variable declared in one source code file into another source code file.

A)auto
B)static
C)extern
D)register

Question 42

A declaration statement that specifically contains the word ____ is different from every other declaration statement in that it does not cause the creation of a new variable by reserving new storage for the variable.

A)auto
B)static
C)extern
D)register

Question 43

A variable that can store an address is known as a(n) ____ variable.

A)register
B)pointer
C)static
D)extern

Question 44

To use a stored address, C provides us with an indirection operator, ____.

A)%
B)^
C)&
D)*

Question 45

If numAddr is a pointer, ____ means the variable whose address is stored in numAddr.

A)*numAddr
B)numAddr*
C)&numAddr
D)*&numAddr

Question 46

The declaration statement ____ declares milesAddr to be a pointer variable that can store the address of (that is, will point to) an integer variable.

A)int milesAddr&;
B)int milesAddr*;
C)int *milesAddr;
D)int &milesAddr;

Question 47

Functions that call themselves are referred to as ____ functions.

A)nested
B)recursive
C)loop-back
D)rolling

Question 48

When a function invokes itself, the process is called ____ recursion.

A) direct
B) mutual
C) self-referential
D) indirect

Question 49

A function can invoke a second function, which in turn invokes the first function; this type of recursion is referred to as ____ recursion.

A) direct
B) mutual
C) self-referential
D) tail