Explore topic-wise MCQs in Object Oriented Programming.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Object Oriented Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

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

A. No constructor defined
B. One default value constructor
C. Defining the default constructor
D. Using one constructor with two arguments
Answer» C. Defining the default constructor
Discussion
2.

Which is the correct statement for default constructors?

A. The constructors with all the default arguments
B. The constructors with all the null and zero values
C. The constructors which can’t be defined by programmer
D. The constructors with zero arguments
Answer» E.
Discussion
3.

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

A. The default values given will not be used
B. Then all the null values will be used
C. Then all the default values given will be used
D. Then compiler will produce an error
Answer» D. Then compiler will produce an error
Discussion
4.

Which constructor definition will produce a compile time error?

A. className(int x=0);
B. className(char c);c) className(int x=0,char
C. ;c) className(int x=0,char c);
D. className(char c,int x=0);
Answer» D. className(char c,int x=0);
Discussion
5.

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

A. className(int x=5,char c=’a’);
B. int className(int x, char c, char d);
C. className(int x, char c, int y);
D. ;c) className(int x, char c, int y);d) char className(char c,int x);
Answer» B. int className(int x, char c, char d);
Discussion
6.

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

A. The constructors might have all the same arguments except the default arguments
B. The constructors might have same return type
C. The constructors might have same number of arguments
D. The constructors can’t be overloaded with respect to default arguments
Answer» B. The constructors might have same return type
Discussion
7.

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);

A. 1
B. 2
C. 3
D. Compile time error
Answer» C. 3
Discussion
8.

Which is the correct syntax for using default arguments with the constructor?

A. default constructorName(default int x=0)
B. constructorName(default int x=0)
C. constructorName(int x=0)
D. constructorName()
Answer» D. constructorName()
Discussion
9.

Can a class have more than one function with all the default arguments?

A. Yes, always
B. Yes, if argument list is different
C. No, because constructors overloading doesn’t depend on argument list
D. No, never
Answer» E.
Discussion
10.

Which among the following can be used in place of default constructor?

A. constructorName(int x, int y=0)
B. constructorName(int x=0, int y=0)
C. constructorName(int x=0, int y)
D. constructorName(int x, int y)
Answer» C. constructorName(int x=0, int y)
Discussion
11.

The Constructors with all the default arguments are similar as default constructors.

A. True
B. False
Answer» B. False
Discussion
12.

If a constructors should be capable of creating objects without argument and with arguments, which is a good alternative for this purpose?

A. Use zero argument constructor
B. Use constructor with one parameter
C. Use constructor with all default arguments
D. Use default constructor
Answer» D. Use default constructor
Discussion
13.

Which among the following is true for constructors overloading?

A. Constructors can’t be overloaded
B. Constructors can be overloaded using different signatures
C. Constructors can be overloaded with same signatures
D. Constructors can be overloaded with different return types
Answer» C. Constructors can be overloaded with same signatures
Discussion
14.

Which constructor definition will produce a compile time error?$

A. className(int x=0);
B. className(char c);
C. className(int x=0,char c);
D. className(char c,int x=0);
Answer» D. className(char c,int x=0);
Discussion
15.

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

A. className(int x=5,char c=’a’);
B. int className(int x, char c, char d);
C. className(int x, char c, int y);
D. char className(char c,int x);
Answer» B. int className(int x, char c, char d);
Discussion
16.

How many parameters must be passed if only the following prototype is given to a constructor?

A. ;
B. 1
C. 2
D. 3
Answer» C. 2
Discussion