Programming in C++ Online Test 1 – Randomized MCQs

With each visit of this Programming in C++ online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.

Test Instructions
Question type	Randomized MCQs.Changes every time you visit the test
Total Number of Questions	30
Time Limit	20 Minutes
Points	1 Point for each Question

Remaining Time: 0 MINUTES

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Question 1 of 30

Q-1.The members of a class, by default, are

public

protected

private

mandatory to specify

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.Which of the following ways are legal to access a class data member using this pointer?

this.x

*this.x

*(this.x)

(*this).x

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.In which case is it mandatory to provide a destructor in a class?

Almost in every class

Class for which two or more than two objects will be created

Class for which copy constructor is defined

Class whose objects will be created dynamically

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.Consider the following statements char *ptr; ptr = “hello”; cout << *ptr; What will be printed?

first letter

entire string

it is a syntax error

last letter

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.Identify the operator that is NOT used with pointers

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.RunTime polymorphism is achieved by ___________

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.If the variable count exceeds 100, a single statement that prints “Too many” is

if (count<100) cout << “Too many”;

if (count>100) cout >> “Too many”;

if (count>100) cout << “Too many”;

None of these

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.Pure virtual functions

have to be redefined in the inherited class.

cannot have public access specification.

are mandatory for a virtual class.

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.The process of building new classes from existing one is called ______.

Polymorphism

Structure

Inheritance

Cascading

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.A function call mechanism that passes arguments to a function by passing a copy of the values of the arguments is __________

call by name

call by value

call by reference

call by value result

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.Which of the following is the valid class declaration header for the derived class d with base classes b1 and b2?

class d : public b1, public b2

class d : class b1, class b2

class d : public b1, b2

class d : b1, b2

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.If you wanted to sort many large objects or structures, it would be most efficient to

place them in an array & sort the array.

place pointers to them in an array & sort the array.

place them in a linked list and sort the linked list.

place references to them in an array and sort the array

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.In C++, dynamic memory allocation is accomplished with the operator ____

new

this

malloc( )

delete

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.Data members which are static

cannot be assigned a value

can only be used in static functions

cannot be defined in a Union

can be accessed outside the class

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.What is the error in the following code? class t { virtual void print(); }

No error.

Function print() should be declared as static.

Function print() should be defined.

Class t should contain data members.

Your Answer:Correct

Your Answer:Incorrect

Question 16 of 30

Q-16.In access control in a protected derivation, visibility modes will change as follows:

private, public and protected become protected

only public becomes protected.

public and protected become protected.

only private becomes protected.

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.The statement f1.write((char*)&obj1, sizeof(obj1));

writes the member function of obj1 to f1.

Writes the data in obj1 to f1.

Writes the member function and the data of obj1 to f1

Writes the address of obj1 to f1.

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.A pure virtual function is a virtual function that

has no body

returns nothing

is used in base class

both (A) and (C)

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.Which of the following expressions is illegal?

(10 6).

(false && true)

bool (x) = (bool)10;

float y = 12.67;

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.A static function

should be called when an object is destroyed.

is closely connected with and individual object of a class.

can be called using the class name and function name.

is used when a dummy object must be created.

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.If we store the address of a derived class object into a variable whose type is a pointer to the base class, then the object, when accessed using this pointer.

continues to act like a derived class object.

Continues to act like a derived class object if virtual functions are called.

Acts like a base class object.

Acts like a base class, if virtual functions are called.

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.Which of the following statement is valid?

We can create new C++ operators.

We can change the precedence of the C++ operators.

We can change the associativity of the C++ operators.

We can not change operator templates.

Your Answer:Correct

Your Answer:Incorrect

Question 23 of 30

Q-23.Member functions, when defined within the class specification:

are always inline.

are not inline.

are inline by default, unless they are too big or too complicated.

are not inline by default.

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.It is possible to declare as a friend

a member function

a global function

a class

all of the above

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.A struct is the same as a class except that

there are no member functions.

all members are public.

cannot be used in inheritance hierarchy.

it does have a this pointer.

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.To access the public function fbase() in the base class, a statement in a derived class function fder() uses the statement.fbase();

fbase();

fder();

base::fbase();

der::fder();

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.Which statement gets affected when i++ is changed to ++i?

i = 20; i++;

for (i = 0; i<20; i++) { }

a = i++;

while (i++ = 20) cout i;

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.The following can be declared as friend in a class

an object

a class

a public data member

a private data member

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access

protected and public data only in C and B.

protected and public data only in C.

private data in A and B.

protected data in A and B.

Your Answer:Correct

Your Answer:Incorrect

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