Midterm 1

Question 1

What value will the function eof return if there are more characters to be read in the input stream?

Answer 1

false

Question 2

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

Answer 2

true

Question 3

What will inFile.fail( ) return if the file associated with the stream inFile cannot be opened?

Answer 3

true

Question 4

The data members of a class are usually placed in the private section of a class.

Answer 4

true

Question 5

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

Answer 5

true

Question 6

If the implementation of a member function calls another member function, you do not need to use dot notation.

Answer 6

true

Question 7

A constructor cannot specify a return type.

Answer 7

true

Question 8

The implementation of the member functions cannot access the private section of the class.

Answer 8

false

Question 9

Object-oriented design first identifies the objects required in a problem.

Answer 9

true

Question 10

q In object-oriented design, it is considered a correct procedure to implement a little, then test.

Answer 10

true

Question 11

11. When passing a file stream object to a function, you should always pass it by reference.

Answer 11

true

Question 12

12. You must use the private access specification for all data members of a class.

Answer 12

true

Question 13

13. By default, when an object is assigned to another, each member of one object is copied to its counterpart in the other object.

Answer 13

true

Question 14

A static member variable can be used when there are no objects of the class in existence.

Answer 14

true

Question 15

A class may have this many default constructor(s).

Answer 15

at most one

Question 16

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

Answer 16

employee[2].hourlyWage = 100.00;

Question 17

Passing a structure as a constant reference parameter to a function does this

Answer 17

guarantees not to result in changes to the structure’s members

Question 18

This data type can be used to create files and write information to them but cannot be used to read information from them.

Answer 18

ofstream

Question 19

Class type declarations (the class interface) are usually stored here

Answer 19

in their own header files

Question 20

A class is a(n) ________ that is defined by the programmer

Answer 20

data type

Question 21

If the compiler encounters the line #ifndef BUTTON_H

Answer 21

go to the next line

Question 22

Which is the best prototype for a member function of a person class that returns true if the person object’s age is greater than that of another person object. Assume that age is a data member of the person class.

Answer 22

bool isOlderThan (const person &p) const;

Question 23

The first line of the implementation file time.cpp for a class called Time could be

Answer 23

include “time.h”

Question 24

What is the code that associates the input file stream inf with the file myFile.txt?

Answer 24

#define aFile “myFile.txt” ...ifstream inf;
     inf.open (aFile);

Question 25

In the header file of a person class, which of the following is the default constructor?

Answer 25

person ();

Question 26

A function that retrieves the value of a data member is called a(n):

Answer 26

accessor

Question 27

If menu_button is an object of a class called button with a member function called get_color which has no parameters, a correct function call is:

Answer 27

menu_button.get_color( )

Question 28

The word const after the end of a member function’s heading means

Answer 28

the function cannot change the data members

Question 29

To pass an object of class person to a function as a formal value parameter most efficiently you should use:

Answer 29

const person&p

Question 30

If a pointer p points to a struct type variable of type car which has fields make, model and year, which of the following is a correct way to reference the model.

Answer 30

(*p).model

Question 31

What is true about the following statement?

Answer 31

If the file already exists, its contents are preserved and all output is written to the end of the file.

Question 32

A header file is typically given the filename extension:

Answer 32

.h

Question 33

This is a special function that is called whenever a new object is created and initialized with another object’s data.

Answer 33

copy constructor

Question 34

The assignment operator (=) can be used to:

Answer 34

Copy data from one object to another.

Question 35

The compiler will implicitly create a default constructor if:

Answer 35

The class does not define any constructors.

Question 36

Which of the following statements is not true of a constructor and destructor of the same class?

Answer 36

They both are able to have default arguments.

Question 37

If Americans are objects of the same class, which of the following attributes would most likely be represented by a static variable of that class?

Answer 37

something similar that carries over across all of them