Deck 11: Structured Data

Question 1

The name of the structure is referred to as its

A) data type
B) argument
C) parameter
D) tag
E) None of these

Answer 1

E

Question 2

This is like a structure, except all members occupy the same memory area.

A) array
B) union
C) structure pointer
D) array of pointers
E) None of these

Answer 2

B

Question 3

You may use a pointer to a structure as a

A) function parameter.
B) structure member.
C) function return type.
D) All of these.
E) None of these

Answer 3

D

Question 4

This is required after the closing brace of the structure declaration.

A) square bracket
B) period
C) semicolon
D) colon
E) None of these

Question 5

If an anonymous union is declared globally (outside all functions), it must be:

A) empty
B) declared static
C) explicitly declared "global"
D) initialized and used outside any function
E) None of these

Question 6

A function ___________ return a structure.

A) may
B) may not
C) will always
D) cannot possibly
E) None of these

Question 7

Data types that are created by the programmer are known as:

A) variables
B) abstract data types (ADT)
C) functions
D) parameters
E) None of these

Question 8

Look at the following statement. bookList[2].publisher[3] = 't';
This statement...

A) is illegal in C++.
B) will change the publisher's name of the second book in bookList to 't'.
C) will store the character 't' in the fourth element of the publisher member of booklist[2].
D) will ultimately result in a runtime error.
E) None of these.

Question 9

When a structure is passed _________to a function, its members are not copied.

A) by reference
B) by value
C) Neither of these

Question 10

If Circle is a structure tag, the statement Circle doSomething(Circle c2)
Can be the header line for a function that

A) determines and returns the area of a circle
B) takes a Circle structure as a parameter, does something, and returns a Circle structure
C) operates on a constant reference to a Circle structure
D) takes two Circle parameters and does something
E) None of these

Question 11

This allows you to access structure members.

A) structure access operator
B) dot operator
C) #include directive
D) getmember function
E) None of these

Question 12

Before a structure can be used, it must be

A) declared
B) deallocated
C) initialized
D) All of these
E) None of these

Question 13

Which of the following is an example of a C++ primitive data type?

A) unsigned short int
B) long double
C) unsigned char
D) All of these
E) None of these

Question 14

Members of a(n) ________ union have names, but the union itself has no name.

A) anonymous
B) dereferenced
C) organized
D) declared
E) None of these

Question 15

To dereference a structure pointer, the appropriate operator is:

A) the ampersand, &
B) an asterisk, *
C) the structure pointer operator, ->
D) the dereference operator, <-
E) None of these

Question 16

A structure pointer contains:

A) The address of a structure variable
B) The dereferenced address of a structure tag
C) The name and address of the structure tag
D) The address of a structure tag
E) None of these

Question 17

Which of the following assigns a value to the hourlyWage member of employee[2]?

A) employee[2]->hourlyWage = 50.00;
B) employee2.hourlyWage = 7.50;
C) hourlyWage[2].employee = 29.75
D) employee[2].hourlyWage = 100.00;
E) None of these

Question 18

Passing a structure as a constant reference parameter to a function:

A) can potentially result in changes to the structure's members.
B) guarantees not to result in changes to the structure's members.
C) will always change the structure's members.
D) All of these
E) None of these

Question 19

If a is a structure variable and p, a pointer, is a member of the structure, what will the following statement do? cout << *a.p;

A) Output the dereferenced value pointed to by p
B) Result in a compiler error
C) Output the address stored in p
D) Output the value stored in a
E) None of these

Question 20

This describes only the general characteristics of an object.

A) initialization
B) abstraction
C) detailed specification
D) initiation
E) None of these

Question 21

A declaration for an enumerated type begins with this key word.

A) enumerated
B) enum_type
C) enum
D) ENUM

Question 22

A good reason to pass a structure as a constant reference is:

A) to prevent changes to the structure members
B) to ensure changes to the structure members
C) to slow down the function's execution, preventing errors
D) to speed up the function's modification of the structure members
E) None of these

Question 23

Look at the following declaration. enum Tree { OAK, MAPLE, PINE };
What is the value of the following relational expression?
OAK > PINE

A) true
B) false
C) This is an error. You cannot compare enumerators with relational operators.

Question 24

With an enumerated data type, the enumerators are stored in memory as

A) strings
B) integers
C) characters
D) doubles

Question 25

Which of the following statements outputs the value of the gpa member of element 1 of the student array?

A) cout << student1.gpa;
B) cout << firstStudent.gpa;
C) cout << student[1].gpa;
D) cout << student1->gpa;
E) None of these

Question 26

The expression s->m; indicates that s is a structure pointer and m is a structure member.

Question 27

Look at the following declaration. enum Tree { OAK, MAPLE, PINE };
In memory, what value will the MAPLE enumerator be stored as?

A) "MAPLE"
B) 2
C) 'M'
D) 1
E) 1.0

Question 28

Structure variables may be passed as arguments to functions.

Question 29

The structure pointer operator is used to dereference a pointer to a structure, not a pointer that is a member of a structure.

Question 30

A struct can contain members with varying data types.

Question 31

Look at the following structure declaration. struct Employee
{
String name;
Int idNum;
};
In this declaration, Employee is

A) a member
B) an array
C) a tag
D) None of these

Question 32

When a programmer creates an abstract data type, he or she can decide what values are acceptable for the data type, as well as what operations may be performed on the data type.

Question 33

You can define any number of union variables, but each variable can only store the value of one member at a time.

Question 34

Any mathematical operations that can be performed on regular C++ variables can be performed on structure members.

Question 35

A function cannot modify the members of a structure.

Question 36

It is possible to output the contents of all members of a structure variable using a cout << statement followed by the name of the structure variable.

Question 37

Look at the following structure declaration. struct Employee
{
String name;
Int idNum;
};
In this declaration, idNum is

A) a member
B) an array
C) a tag
D) None of these

Question 38

If a function is legally prototyped to return an integer value, it can return a structure member that is an integer data type.

Question 39

If Circle is a structure tag, the statement Circle *pcirc;

A) declares a structure variable called *pcirc
B) declares a structure pointer called pcirc
C) is illegal in C++
D) initializes a Circle pointer
E) None of these

Question 40

A structure _____________ contain members of the same data type.

A) cannot
B) can
C) shouldn't
D) None of these

Question 41

It is possible for a structure to contain as a member a pointer to its own structure type.

Question 42

A union can only have one member.

Question 43

You cannot directly assign an integer value to an enum variable.

Question 44

The expression *s->p; indicates that s is a structure pointer and p, which is also a pointer, is a member of the structure pointed to by s.

Question 45

You cannot directly assign an enumerator to an int variable.

Question 46

Look at the following structure declaration.
struct Circle
{
double centerX;
double centerY;
double radius;
};
Assume that circle1 and circle2 are variables of the Circle type, and their members have been initialized. Is it true or false that the following if statement correctly determines whether the two variables' members contain the same data:
if (circle1 == circle2)

Question 47

The following union declaration appears on a system uses 4-byte ints and 8-byte doubles.
union Numbers
{
int integerNumber;
double doubleNumber;
};
Numbers myNumber;
myNumber.integerNumber = 1;
True or False: After this code executes, the myNumber variable will occupy 4 bytes of memory.

Question 48

The names of the enumerators in an enumerated data type must be enclosed in quotation marks.

Question 49

An anonymous union declaration actually creates the member variables in memory.

Question 50

It is possible for a structure variable to be a member of another structure variable.