Object Oriented Programming MCQs

Page No. 80

If a member function have to be made both zero argument and parameterized constructor, which among the following can be the best option?


aTwo normal and one default argument

✖


bAt least one default argument

✖


c Exactly one default argument

✖


dMake all the arguments default

✓


View Answer Make all the arguments default

If a member function have to be made both zero argument and parameterized constructor, which among the following can be the best option?


aTwo normal and one default argument

✖


bAt least one default argument

✓


cExactly one default argument

✖


d Make all the arguments default

✖


View Answer At least one default argument

Which is the correct condition for the default arguments?


aThose must be declared as last arguments in argument list

✓


b Those must be declared first in the argument list

✖


cThose can be defined anywhere in the argument list

✖


d Those are declared inside the function definition

✖


View Answer Those must be declared as last arguments in argument list

What are default arguments?


aArguments which are not mandatory to be passed

✓


b Arguments with default value that aren’t mandatory to be passed

✖


cArguments which are not passed to functions

✖


dArguments which are not passed to functions

✖


View Answer Arguments which are not mandatory to be passed

Which is a good alternative instead of having one zero argument constructor and one single argument constructor with default argument?


aNo constructor defined

✖


bOne default value constructor

✓


cDefining the default constructor

✖


dUsing one constructor with two arguments

✖


View Answer One default value constructor

If there is a constructor with all the default arguments and arguments are not passed then _________________


aThe default values given will not be used

✖


bThen all the null values will be used

✖


cThen all the default values given will be used

✓


dThen compiler will produce an error

✖


View Answer Then all the default values given will be used

Which constructor definition will produce a compile time error?


aclassName(int x=0);

✖


bclassName(char c);

✖


cclassName(int x=0,char c);

✓


dclassName(char c,int x=0);

✖


View Answer className(int x=0,char c);

Which constructor among the following will be called if a call is made like className(5,’a’);?


aclassName(int x=5,char c=’a’);

✓


b int className(int x, char c, char d);

✖


cclassName(int x, char c, int y);

✖


d char className(char c,int x);

✖


View Answer className(int x=5,char c=’a’);

If the constructors are overloaded by using the default arguments, which problem may arise?


aThe constructors might have all the same arguments except the default arguments

✓


bThe constructors might have same return type

✖


c The constructors might have same number of arguments

✖


dThe constructors can’t be overloaded with respect to default arguments

✖


View Answer The constructors might have all the same arguments except the default arguments

How many parameters must be passed if only the following prototype is given to a constructor? Prototype: className(int x, int y, int z=0);


a1

✖


b2

✓


c3

✖


dCompile time error

✖


View Answer 2

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