C++ Final Exam Questions And Answers

25 Questions | By Noah.belcher | Last updated: May 26, 2022 | Total Attempts: 3765

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C++ is a popular programming language used to create computer programs. Have you studied this subject? Check out these C++ final exam questions and answers and get to revise your concepts. This interactive quiz consists of well-researched questions and answers about the C++ concepts. So, give it a try and see how much score you can make. So, are you ready to take this quiz? Let's start then. All the best!

Questions and Answers

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
- D.
  
  Extraction
25.

__________ implements the same function name, but different parameters. The simplest example of this is having multiple constructors.
- A.
  
  Abstraction
- B.
  
  Overriding
- C.
  
  Overloading
- D.
  
  None of the above