Explore topic-wise MCQs in Technical Programming.

This section includes 1331 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.

851.

The following can be declared as friend in a class

A. an object
B. a class
C. a public data member
D. a private data member
Answer» C. a public data member
Discussion
852.

A white space is :

A. blank space
B. new line
C. tab
D. all of the above
Answer» E.
Discussion
853.

What will be the output of following program? #include void main() { float x; x=(float)9/2; cout

A. 4.5
B. 4.0
C. 4
D. 5
Answer» B. 4.0
Discussion
854.

A constructor

A. Constructs new data type
B. Enables the initialization of an object as it is created
C. Obtain memory for a new variable
D. None of the above
Answer» C. Obtain memory for a new variable
Discussion
855.

What will be the value of d if d is a float after the operation d = 2 / 7.0?

A. 0
B. 0.2857
C. Cannot be determined
D. None of the above
Answer» C. Cannot be determined
Discussion
856.

Which of the following shows the correct hierarchy of arithmetic operations in C ?

A. / + * -
B. * - / +
C. + - / *
D. * / + -
Answer» E.
Discussion
857.

The actual source code for implementing a template function is created when

A. The declaration of function appears.
B. The function is invoked.
C. The definition of the function appears.
D. None of the above.
Answer» C. The definition of the function appears.
Discussion
858.

Which of the following expressions is illegal?

A. (10|6).
B. (false && true)
C. bool (x) = (bool)10;
D. float y = 12.67;
Answer» D. float y = 12.67;
Discussion
859.

Consider the following class definitions: class a { }; class b: protected a { }; What happens when we try to compile this class?

A. Will not compile because class body of a is not defined.
B. Will not compile because class body of b is not defined.
C. Will not compile because class a is not public inherited.
D. Will compile successfully.
Answer» E.
Discussion
860.

The major goal of inheritance in c++ is:

A. To facilitate the conversion of data types.
B. To help modular programming.
C. To extend the capabilities of a class.
D. To hide the details of base class.
Answer» D. To hide the details of base class.
Discussion
861.

Which of the following will produce a value 10 if x = 9.7?

A. floor(x)
B. abs(x)
C. log(x)
D. ceil(x)
Answer» E.
Discussion
862.

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++;

A. x=25, m=10, n=15
B. x=26, m=11, n=16
C. x=27, m=11, n=16
D. x=27, m=10, n=15
Answer» C. x=27, m=11, n=16
Discussion
863.

A class defined within another class is:

A. Nested class
B. Inheritance
C. Containership
D. Encapsulation
Answer» B. Inheritance
Discussion
864.

What is the output of given code fragment? int f=1, i=2; while(++i

A. 12
B. 24
C. 6
D. 3
Answer» B. 24
Discussion
865.

Name the header file to be included for the use of built in function isalnum()

A. string.h
B. process.h
C. ctype.h
D. dos.h
Answer» D. dos.h
Discussion
866.

Which of the following is not the characteristic of constructor.

A. They should be declared in the public section.
B. They do not have return type.
C. They can not be inherited.
D. They can be virtual.
Answer» E.
Discussion
867.

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

A. A built-in conversion function.
B. A one-argument constructor.
C. A conversion function that’s a member of the class.
D. An overloaded ‘=‘ operator.
Answer» D. An overloaded ‘=‘ operator.
Discussion
868.

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

A. writes the member function of obj1 to f1.
B. Writes the data in obj1 to f1.
C. Writes the member function and the data of obj1 to f1.
D. Writes the address of obj1 to f1.
Answer» C. Writes the member function and the data of obj1 to f1.
Discussion
869.

We can output text to an object of class ostream using the insertion operator

A. the ostream class is a stream
B. the insertion operator works with all classes.
C. we are actually outputting to cout.
D. the insertion operator is overloaded in ostream.
Answer» E.
Discussion
870.

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

A. class d : public b1, public b2
B. class d : class b1, class b2
C. class d : public b1, b2
D. class d : b1, b2
Answer» B. class d : class b1, class b2
Discussion
871.

. A template class

A. is designed to be stored in different containers
B. works with different data types
C. generates objects which must be identical
D. generates classes with different numbers of member functions.
Answer» C. generates objects which must be identical
Discussion
872.

The purpose for mode “w+b” in file operation is

A. create a binary file for write
B. create a binary file for read/write
C. open a binary file for writing
D. open a binary file for reading/writing
Answer» C. open a binary file for writing
Discussion
873.

A static function

A. should be called when an object is destroyed.
B. is closely connected with and individual object of a class.
C. can be called using the class name and function name.
D. is used when a dummy object must be created.
Answer» D. is used when a dummy object must be created.
Discussion
874.

A pure virtual function is a virtual function that

A. has no body
B. returns nothing
C. is used in base class
D. both (A) and (C)
Answer» E.
Discussion
875.

If there is a pointer p to object of a base class and it contains the address of an object of a derived class and both classes contain a virtual member function abc(), then the statement p->abc(); will cause the version of abc() in the ................. class to be executed.

A. Base Class
B. Derived class
C. Produces compile time error
D. produces runtime error
Answer» C. Produces compile time error
Discussion
876.

An array element is accessed using

A. a FIFO approach
B. an index number
C. the operator
D. a member name
Answer» C. the operator
Discussion
877.

RunTime polymorphism is achieved by .................

A. friend function
B. virtual function
C. operator overloading
D. function overloading
Answer» C. operator overloading
Discussion
878.

A library function exit() causes an exit from

A. the loop in which it occurs
B. the block in which it occurs
C. the function in which it occurs
D. the program in which it occurs
Answer» E.
Discussion
879.

Which of the statements is true in a protected derivation of a derived class from a base class?

A. Private members of the base class become protected members of the derived class
B. Protected members of the base class become public members of the derived class
C. Public members of the base class become protected members of the derived class
D. Protected derivation does not affect private and protected members of the derived class.
Answer» D. Protected derivation does not affect private and protected members of the derived class.
Discussion
880.

main ( ) is an example of

A. library function
B. user defined function
C. header
D. statement
Answer» B. user defined function
Discussion
881.

The output of the following code is a = 5; a

A. 5
B. 6
C. 2
D. 3
Answer» B. 6
Discussion
882.

How many constructors can a class have?

A. 0
B. 1
C. 2
D. any number
Answer» E.
Discussion
883.

Function templates can accept

A. any type of parameters
B. only one parameter
C. only parameters of the basic type
D. only parameters of the derived type
Answer» D. only parameters of the derived type
Discussion
884.

A pointer to the base class can hold address of

A. only base class object
B. only derived class object
C. base class object as well as derived class object
D. None of the above
Answer» D. None of the above
Discussion
885.

Exception handling is targeted at

A. Run-time error
B. Compile time error
C. Logical error
D. All of the above.
Answer» B. Compile time error
Discussion
886.

Which of the following statements is NOT valid about operator overloading?

A. Only existing operators can be overloaded.
B. Overloaded operator must have at least one operand of its class type.
C. The overloaded operators follow the syntax rules of the original operator.
D. none of the above.
Answer» E.
Discussion
887.

Which of the following is false for cin?

A. It represents standard input.
B. It is an object of istream class.
C. It is a class of which stream is an object.
D. Using cin the data can be read from user’s terminal.
Answer» D. Using cin the data can be read from user’s terminal.
Discussion
888.

Data members which are static

A. cannot be assigned a value
B. can only be used in static functions
C. cannot be defined in a Union
D. can be accessed outside the class
Answer» C. cannot be defined in a Union
Discussion
889.

Within a switch statement

A. Continue can be used but Break cannot be used
B. Continue cannot be used but Break can be used
C. Both Continue and Break can be used
D. Neither Continue nor Break can be used
Answer» B. Continue cannot be used but Break can be used
Discussion
890.

The expression, a = 30 * 1000 + 2768 ; evaluates to

A. 32768
B. -32768
C. 113040
D. 0
Answer» B. -32768
Discussion
891.

The operator

A. must be a member function
B. must be a non member function
C. can be both (A) & (B) above
D. cannot be overloaded
Answer» D. cannot be overloaded
Discussion
892.

for (; ;)

A. means the test which is done using some expression is always true
B. is not valid
C. will loop forever
D. should be written as for( )
Answer» D. should be written as for( )
Discussion
893.

Declaration of a pointer reserves memory space

A. for the object.
B. for the pointer.
C. both for the object and the pointer.
D. none of these.
Answer» C. both for the object and the pointer.
Discussion
894.

In multiple inheritance

A. the base classes must have only default constructors
B. cannot have virtual functions
C. can include virtual classes
D. None of the above.
Answer» D. None of the above.
Discussion
895.

It is possible to declare as a friend

A. a member function
B. a global function
C. a class
D. all of the above
Answer» E.
Discussion
896.

Which statement gets affected when i++ is changed to ++i?

A. i = 20; i++;
B. for (i = 0; i<20; i++) { }
C. a = i++;
D. while (i++ = 20) cout <<i;
Answer» B. for (i = 0; i<20; i++) { }
Discussion
897.

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

A. place them in an array & sort the array.
B. place pointers to them in an array & sort the array.
C. place them in a linked list and sort the linked list.
D. place references to them in an array and sort the array.
Answer» D. place references to them in an array and sort the array.
Discussion
898.

this pointer

A. implicitly points to an object.
B. can be explicitly used in a class.
C. can be used to return an object.
D. All of the above.
Answer» E.
Discussion
899.

Use of virtual functions implies

A. overloading.
B. overriding.
C. static binding.
D. dynamic binding.
Answer» E.
Discussion
900.

Additional information sent when an exception is thrown may be placed in

A. the throw keyword.
B. the function that caused the error.
C. the catch block.
D. an object of the exception class.
Answer» D. an object of the exception class.
Discussion