SparkNotes: Review of C++ Fundamentals: Review Test

1. Data members are usually private and member functions public because

(A) programs don't need to refer to data as much as functions.

(B) data encapsulation is a safety issue, whereas functions are necessary for interaction with objects

(C) functions take up more memory than variables

2. Member functions are generally used to manipulate

(A) global variables

(B) variables defined within the functions

(C) member data

3. Whitespace consists of all of the following, except

(A) spaces

(B) new lines

(C) commas

(D) tabs

4. The assignment operator =

(A) makes sure that two variables are equal

(B) returns true or false depending on whether or not two values are equal

(C) assigns the value of the right hand term to the left hand term

5. To complete high precision operations involving the first 20 digits of pi, you would most likely use which of the following data types?

(A) long

(B) long int

(C) float

(D) long double

(E) double

6. Which of the following will print out: a c b d

(A) cout << "a\\tc\\nb\\td" << endl;

(B) cout << a,b << c,d;

(C) cout << 'a' << 'c' << "b\\nd";

(D) cout << "a" << "b\\n" << "c\\td\\n";

7. 91 % 7 evaluates to

(A) 0

(B) 1

(C) 2

(D) 3

(E) 4

8. Which of the following statements will not affect the value of x?

(A) x++;

(B) x += x--;

(C) x = x++;

(D) x = --x + 1;

9. If you create a class called bird and you want an instance of it, say object robin, to fly, then the command might look like:

(A) robin::fly();

(B) robin::bird.fly();

(C) robin.fly();

(D) bird->robin->fly();

10. Relational operators compare 2 ____ values and evaluate to a ____.

(A) boolean, number

(B) numbers, boolean

(C) logical values, number

(D) boolean, logical value

11. Which for-loop will run a variable from 5 to 105 in steps of 4?

(A) for(int i = 5; i <= 105; i += 4)

(B) for(int i == 5; i > 105; i = i + 4)

(C) for(int i == 5; i < 105; i = i + 4)

(D) for(int i = 5; i > 105; i += 4)

12. Which expression will cause the while-loop to loop until x equals 1 or init is not 'g'?

(A) while(x == 1 && init != 'g')

(B) while((x == 1) || (init != 'g'))

(C) while((x != 1) && (init == 'g'))

13. A do-loop is different from a while loop because

(A) do-loops have a preset number of cycles for looping.

(B) the code in a do-loop is executed at least one time.

(C) while loops will only check the condition after each pass.

(D) the break statement works in while-loops but not in do-loops.

14. Which statement checks that the character dig falls between the characters '1' and '9'?

(A) if(dig >= '1' && dig <= '9')

(B) if(dig >= '1') else (dig <= '9')

(C) if(dig > '1' || dig < '9')

15. An object usually interacts with the rest of the program via

(A) direct access to member data

(B) member functions

(C) the operators << and >>

(D) the virtual keyword

16. In a nested for-loop structure, the break command will take you out of the loop it is in, but will not take you out of any of the other loops.

(A) True

(B) False

17. You want to display "too short" if height is less than 4 and "okay" otherwise. Your best choice is to use a(n)

(A) for-loop

(B) switch-statement

(C) if/else-statement

(D) array

18. If you type obj1=obj2;, the compiler

(A) makes sure the member data is the same for both objects.

(B) sets obj2 equal to obj1.

(C) copies all of obj2's data into obj1.

(D) returns some boolean value.

19. Function arguments are used to

(A) pass information to the function

(B) protect variables from changing, in the case of passing by reference

(C) return multiple values from a function, in the case of passing by value

20. To tell a car object variable to speed up by 10 mph, you might

(A) pass the argument 10 by reference to a car function

(B) type Viper.accelerate(10);

(C) type car.accelerate(10);

21. The return statement tells a function to

(A) stop executing and send back a value.

(B) assume a value and finish the rest of the function.

(C) go back and execute one line in main(), and then finish the function.

22. To use the sqrt() function defined in header file math.h, you must write

(A) include(math.h, sqrt())

(B) #include <math.h>

(C) using(sqrt, math.h)

23. To create an array of 10 elements of type int, you would write

(A) int [10] array;

(B) int [9] array;

(C) int array[10];

(D) array [int 9];

24. The last element in an array of 50 elements is

(A) array[0]

(B) array[49]

(C) array[50]

(D) array[51]

25. To loop through an array of size 6, a proper for-loop statement would be

(A) for(i = 0; i < 6; i++)

(B) for(i = array[0]; i < array[5]; i++)

(C) for(array[0] = i = 0; i < array[5]; i += 1)

26. To initialize a one dimensional array to contain the numbers 1 through 6, you would write

(A) int array[6] = {[1], [2], [3], [4], [5], [6]};

(B) int array[6] = {{1}, {2}, {3}, {4}, {5}, {6}};

(C) int array[] = {1, 2, 3, 4, 5, 6};

27. In a three dimensional array declared box[2][3][5], the last element is

(A) box[1][2][4]

(B) box[2][3][5]

(C) box[2][3][4]

28. Linked lists

(A) should always be defined as structs, not classes

(B) can only be implemented as classes

(C) can hold data of any type

(D) must have a constant, defined number of data elements

29. Arrays can hold

(A) only primitive data types.

(B) any type except classes.

(C) any data type.

30. If x is initially 5, then array[--x] will access which element of array?

(A) The fourth element

(B) The fifth element

(C) The sixth element

31. The keyword const ensures a variable

(A) can only be changed by a member function.

(B) will not change value for the duration of the program.

(C) can only be accessed by a member function.

(D) is global.

32. Creating a struct

(A) is similar to creating a class without member functions

(B) requires the keyword static

(C) requires the keyword public

(D) is exactly like creating a class, except there must be at least one member function.

33. Structs are used to create new data types.

(A) True

(B) False

34. To access a struct pointer's data, you use which operator?

(A) .

(B) []

(C) ()

(D) ->

35. Enumerated type values are really represented as integers.

(A) True

(B) False

36. The keyword enum is used to create a

(A) set of variables

(B) set of data types

(C) new data type

37. A function definition differs from a function declaration in that it

(A) contains code for the function

(B) can only appear at the end of the program file

(C) must appear before the function declaration

38. A member function defined within a class is

(A) inline by default

(B) inline unless it's too long

(C) only accessible from within the function

39. Overloaded functions are useful when two or more functions do roughly the same task but with different data types

(A) True

(B) False

40. Default arguments can

(A) change type depending on how the function is called

(B) not be supplied with a new value

(C) be given a new value, but only within the function

(D) be specified or not specified when the function is called

41. Constructors' arguments must all have default arguments.

(A) True

(B) False

42. A static member variable is shared by all objects within the class.

(A) True

(B) False

43. Destructors

(A) return 0 if there were no errors.

(B) initialize all data members.

(C) are called when their objects go out of scope

44. To use a public base class function f(), you can use the statement

(A) Base_class::Derived_class::f()

(B) Base_class.f()

(C) f()

45. To allow derived class functions to access private base class data, you must

(A) use a private base class function.

(B) use public or protected base class function.

(C) not make the base class data private.

(D) not do anything special; the derived class has direct access.

46. If a base class has a constructor, then its derived classes must define one also.

(A) True

(B) False

47. If class der is derived from class base, then der's public member functions can

(A) access private members of base.

(B) not access protected members of base.

(C) access only members of base which are public or protected.

48. Composition is

(A) inheritance from a private class.

(B) the operation of member functions on data members of another class.

(C) the use of an object as a variable within another class

49. Composition is a good way to avoid complications of multiple inheritance.

(A) True

(B) False

50. If you make a new object with pointer = new aClass, and then use the aClass member function func() with the new object, you would write:

(A) Obj.func();

(B) Obj->func();

(C) pointer.func();

(D) pointer->func();