Object Oriented Programming Set 3 MCQs

Q1 | Empty parentheses following a function name in a function prototype indicate that the function does not require any parameters to perform its task.

true

false

Q2 | C++ programmers concentrate on creating , which contain data members and the member functions that manipulate those data members and provide services to clients.

structures

classes

objects

function

Q3 | Which of the following is FALSE about references in C++

a reference must be initialized when declared

once a reference is created, it cannot be later made to reference another object; it cannot be reset

references cannot be null

references cannot refer to constant value

Q4 | What will be the output of following program?#include using namespace std;class Test{public:Test() { cout <<"Hello from Test() "; }} a;int main(){cout <<"Main Started "; return 0;}

main started

main started hello from test()

hello from test() main started

compiler error: global objects are not allowed

Q5 | Which of the following is true about constructors.They cannot be virtual. They cannot be private.They are automatically called by new operator

all 1, 2, and 3

only 1 and 3

only 1 and 2

only 2 and 3

Q6 | Which of the following operators are overloaded by default by the compiler?1) Comparison Operator ( == )2) Assignment Operator ( = )

both 1 and 2

only 1

only 2

none of the two

Q7 | Which of the following is true about inline functions and macros.

inline functions do type checking for parameters, macros don't

macros cannot have return statement, inline functions can

macros are processed by pre-processor and inline functions are processed in later stages of compilation.

all of the above

Q8 | In C++, const qualifier can be applied toMember functions of a classFunction argumentsTo a class data member which is declared as staticReference variables

only 1, 2 and 3

only 1, 2 and 4

all

only 1, 3 and 4

Q9 | Which type is best suited to represent the logical values?

integer

boolean

character

all of the mentioned

Q10 | The following is the C++ style comment

//

/*..*/

–

none of above

Q11 | Which of the following statements is false?

every c++ program must have a main().

in c++, white spaces and carriage returns are ignored by the compiler.

c++ statements terminate with semicolon.

main() terminates with semicolon.

Q12 | Functions can returns

arrays

references

objects

all of above

Q13 | Which of the following control expressions are valid for an if statement?

an integer expression

a boolean expression

either a or b

neither a nor b

Q14 | What will be the values of x, m and n after execution of the following statements? Int x, m, n;m=10; n=15;x= ++m + n++;

x=25, m=10, n=15

x=27, m=10, n=15

x=26, m=11, n=16

x=27, m=11, n=16

Q15 | Which of the following approach is adapted by C++?

top-down

bottom-up

right-left

left-right

Q16 | Which of the following is the correct class of the object cout?

iostream

istream

ostream

ifstream

Q17 | Which of the following functions are performed by a constructor?

construct a new class

construct a new object

construct a new function

initialize objects

Q18 | Which of the following ways are legal to access a class data member using this pointer?

this->x

this.x

*this.x

*this-x

Q19 | Which operator is having right to left associativity in the following?

array subscripting

function call

addition and subtraction

type cast

Q20 | Which operator is having the highest precedence?

postfix

unary

shift

equality

Q21 | #include using namespace std; int main(){int a;a = 5 + 3 * 5;cout <

35

20

25

30

Q22 | In procedural programming the focus in on …...........

data

structure

function

pointers

Q23 | In object oriented programming the focus is on ….......

data

structure

function

pointers

Q24 | Which of the following feature of procedure oriented program is false?

makes use of bottom up approach

functions share global data

the most fundamental unit of program is function

all of these

Q25 | Which of the following feature of object oriented program is false?

data and functions can be added easily

data can be hidden from outside world

object can communicate with each other

the focus is on procedures

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