C++ Practice Final Exam Questions
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Practice final for C++.
- 1.Declare an array to hold 10 integers.
- A.
Int nums[9];
- B.
Int[9] nums;
- C.
Int nums[10];
- D.
Int[10] nums;
- E.
Int billy = new int[10];
- 2.Everything you can do in C, you can do in C++.
- A.
True
- B.
False
- 3.The function "malloc" is used in C to dynamically allocate memory. What is the equivalent of "malloc" in C++?
- A.
Cpp_malloc
- B.
Create_new
- C.
Mem_create
- D.
New
- 4.Which of the following function prototypes declares a reference to the int "numPlayers"?
- A.
Void startGame(int numPlayers&);
- B.
Void startGame(int& numPlayers);
- C.
Void startGame(int* numPlayers);
- D.
Void startGame(int numPlayers*);
- 5.In C++ you must end a class declaration with what character?
- A.
A right curly bracket.
- B.
A right brace.
- C.
Double colons.
- D.
A semi-colon.
- 6.By default, class variables and methods in C++ are __________.
- A.
Protected
- B.
Public
- C.
Private
- D.
Overloaded
- 7.Bob and Alice are both C++ classes with a private member "secret" of type string. Pick the best option that allows Class Alice to access Class Bob's private member "secret".
- A.
Have Class Bob "friend" Class Alice.
- B.
Have Class Alice "friend" Class Bob.
- C.
Make "secret" public.
- D.
Create a public member functions for Alice and Bob called getSecret().
- 8.Class Animal contains a virtual function "speak". Class Cat and Class Dog are derived from Class Animal. (e.g., They both inherit from Class Animal.) Which of the following best describes Class Animal?
- A.
Class Animal is a virtual block class.
- B.
Class Animal is a friend of Class Cat and Class Dog.
- C.
Class Animal is an abstract base class.
- D.
Class Animal is an interface.
- 9.The following is a code snippet from Class Dog:Dog::Dog(const Dog &D);What best describes this function prototype?
- A.
Class Constructor
- B.
Copy Constructor
- C.
Virtual Constructor
- D.
Overloaded Abstract Virtual Constructor
- 10.Line 1: Person q("Mickey");Line 2: Person r(p);Line 3: Person p = q;Line 4: p = q;For what lines above is a copy constructor invoked?
- A.
2
- B.
3
- C.
2,3
- D.
2,3,4
- 11.When is a copy constructor implicitly called?
- A.
Passing an object by value to a function.
- B.
Returning an object by value from a function.
- C.
Both a and b.
- D.
Passing an object by reference to a constructor.
- 12.Line 1: Person a;Line 2: Person b = a;Is line two an implicit or explicit call to the Person copy constructor?
- A.
Implicit
- B.
Explicit
- C.
Both
- D.
None
- 13.Int main(){Person a;Person b;Person c;return 0;}Which object's destructor is called first?
- A.
Person a
- B.
Person b
- C.
Person c
- D.
None of the above
- 14.Destructors are only needed when you have pointers.
- A.
True
- B.
False
- 15.You can free a pointer in C++ using a "delete". Which keyword can you use to free an array?
- A.
Free
- B.
Free[]
- C.
Delete
- D.
Delete[]
- 16.Review *r = newReview();How would you free the memory allocated above?
- A.
Free(r);
- B.
Delete r;
- C.
Delete[] r;
- D.
~r();
- 17.Int*r= new int[5];How would you free the memory allocated above?
- A.
Free(r);
- B.
Delete r;
- C.
Delete[] r;
- D.
~r();
- 18.Destructors are implicity called on local variables when:
- A.
Exiting a function
- B.
Restarting the operating system
- C.
Exiting a statement (if, while, etc.)
- D.
Both a and c
- 19.What is wrong with the following statement:Person a = new Person("noah");
- A.
There is nothing wrong.
- B.
You cannot instantiate an object on the same line as it is declared.
- C.
"noah" is a const string that cannot be reassigned inside the Person class.
- D.
Person a is not a pointer.
- 20.Create a prototype for a const function called "getName" that returns a string.
- A.
Const string getName();
- B.
String getName() const;
- C.
String const getName();
- D.
Const std__str getName();
- 21.Create a prototype for a function called "search" that takes a const string as a parameter and returns an int.
- A.
Void search(const string);
- B.
Int search(const string) const;
- C.
Int search(const string);
- D.
Int const search(string);
- 22.Create a prototype for a const function called query that takes a const int as a parameter and returns an immutable Person object.
- A.
Const Person (const int) const;
- B.
Person const (const int) const;
- C.
Const Person const (const int) const;
- D.
Const Person (const int&) const;
- 23.Which of the following object-oriented features best describes the "is-a" class relationship?
- A.
Composition
- B.
Inheritance
- C.
Aggregation
- D.
Polymorphism
- 24.__________ redefines a function (with exactly the same syntax) to do something else. Examples include overloading the copy constructor.
- A.
Abstraction
- B.
Overriding
- C.
Overloading
- 25.__________ implements the same function name, but different parameters. The simplest example of this is having multiple constructors.
- A.
Abstraction
- B.
Overriding
- C.
Overloading
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