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.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 2 of 30

Q-2.Function templates can accept

any type of parameters

only one parameter

only parameters of the basic type

only parameters of the derived type

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.Consider the following statements: int x = 22,y=15; x = (x>y) ? (x+y) : (x-y); What will be the value of x after executing these statements?

Error. Cannot be executed

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.What would be the output of the following program? int main() { int x,y=10,z=10; x = (y = =z); cout<<

Error

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.Exception handling is targeted at

Run-time error

Compile time error

Logical error

All of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.What will be the values of x, m and n after the execution of the following statements? int x, m, n; m = 10; n = 15; x = ++m + n++;

x=25, m=10, n=15

x=26, m=11, n=16

x=27, m=11, n=16

x=27, m=10, n=15

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.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 8 of 30

Q-8.What will be the output of the following program? #include iostream.h void main() { float x=5,y=2; int result; result=x % y; cout result; }

1.0

Error message

2.5

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.Overloading the function operator

requires a class with an overloaded operator.

requires a class with an overloaded [ ] operator.

allows you to create objects that act syntactically like functions

usually make use of a constructor that takes arguments.

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.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 11 of 30

Q-11.In multiple inheritance

the base classes must have only default constructors

cannot have virtual functions

can include virtual classes

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.A property which is not true for classes is that they

are removed from memory when not in use.

permit data to be hidden from other classes

bring together all aspects of an entity in one place.

Can closely model objects in the real world.

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.Given a class named Book, which of the following is not a valid constructor?

Book ( ) { }

Book ( Book b) { }

Book ( Book &b) { }

Book (char* author, char* title) { }

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.Usually a pure virtual function

has complete function body.

will never be called.

will be called only to delete an object.

is defined only in derived class.

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.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 16 of 30

Q-16.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 17 of 30

Q-17.If we create a file by ‘ifstream’, then the default mode of the file is _________

ios :: out

ios :: in

ios :: app

ios :: binary

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.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 20 of 30

Q-20.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 21 of 30

Q-21.The new operator

returns a pointer to the variable

creates a variable called new

obtains memory for a new variable

tells how much memory is available

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.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 23 of 30

Q-23.A friend function to a class, C cannot access

private data members and member functions.

public data members and member functions.

protected data members and member functions.

the data members of the derived class of C.

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.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 25 of 30

Q-25.To convert from a user defined class to a basic type, you would most likely use.

A built-in conversion function

A one-argument constructor

A conversion function that’s a member of the class.

An overloaded ‘=‘ operator.

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.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 27 of 30

Q-27.Maximum number of template arguments in a function template is

one

two

three

many

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.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 29 of 30

Q-29.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 30 of 30

Q-30.We can output text to an object of class ostream using the insertion operator << because

the ostream class is a stream

the insertion operator works with all classes.

we are actually outputting to cout.

the insertion operator is overloaded in ostream

Your Answer:Correct

Your Answer:Incorrect

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