Explore topic-wise MCQs in Object Oriented Programming.

This section includes 39 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 the correct syntax for declaring the type of this in a member function?

A. classType [cv-qualifier-list] *const this;
B. classType const[cv-qualifier-list] *this;
C. [cv-qualifier-list]*const classType this;
D. [cv-qualifier-list] classType *const this;
Answer» E.
Discussion
2.

Which among the following is/are type(s) of this pointer?

A. const
B. volatile
C. const or volatile
D. int
Answer» D. int
Discussion
3.

This pointer can be used directly to ___________

A. To manipulate self-referential data structures
B. To manipulate any reference to pointers to member functions
C. To manipulate class references
D. To manipulate and disable any use of pointers
Answer» B. To manipulate any reference to pointers to member functions
Discussion
4.

Earlier implementations of C++ ___________________

A. Never allowed assignment to this pointer
B. Allowed no assignment to this pointer
C. Allowed assignments to this pointer
D. Never allowed assignment to any pointer
Answer» D. Never allowed assignment to any pointer
Discussion
5.

The this pointers _____________________

A. Are modifiable
B. Can be assigned any value
C. Are made variables
D. Are non-modifiable
Answer» E.
Discussion
6.

Which syntax doesn’t execute/is false when executed?

A. if(&object != this)
B. if(&function !=object)
C. this.if(!this)
D. this.function(!this)
Answer» B. if(&function !=object)
Discussion
7.

The address of the object _________________

A. Can’t be accessed from inside the function
B. Can’t be accessed in the program
C. Is available inside the member function using this pointer
D. Can be accessed using the object name inside the member function
Answer» D. Can be accessed using the object name inside the member function
Discussion
8.

Which is the correct interpretation of the member function call from an object, object.function(parameter);

A. object.function(&this, parameter)
B. object(&function,parameter)
C. function(&object,&parameter)
D. function(&object,parameter)
Answer» E.
Discussion
9.

The result of sizeof() function __________________

A. Includes space reserved for this pointer
B. Includes space taken up by the address pointer by this pointer
C. Doesn’t include the space taken by this pointer
D. Doesn’t include space for any data member
Answer» D. Doesn’t include space for any data member
Discussion
10.

An object’s this pointer _____________________

A. Isn’t part of class
B. Isn’t part of program
C. Isn’t part of compiler
D. Isn’t part of object itself
Answer» E.
Discussion
11.

The this pointer is accessible __________________

A. Within all the member functions of the class
B. Only within functions returning void
C. Only within non-static functions
D. Within the member functions with zero arguments
Answer» D. Within the member functions with zero arguments
Discussion
12.

Which is the pointer which denotes the object calling the member function?

A. Variable pointer
B. This pointer
C. Null pointer
D. Zero pointer
Answer» C. Null pointer
Discussion
13.

char *ptr;char myString[] = "abcdefg";ptr = myString;ptr += 5;what string does ptr point to in the sample code above?

A. g
B. fg
C. efg
D. defg
E. cdefg
Answer» B. fg
Discussion
14.

What would be the output for the following Turbo C code?#includevoid main(){int a[]={ 1, 2, 3, 4, 5 }, *p;p=a;++*p;printf("%d ", *p);p += 2;printf("%d", *p);}

A. 4
B. 4
C. 2
D. 3
E. 3
Answer» E. 3
Discussion
15.

Which of the following statements are true after execution of the program.void main(){int a[10], i, *p;a[0] = 1;a[1] = 2;p = a;(*p)++;}

A. [1] = 3
B. [0] = 2
C. [1] = 2
D. [0] = 3
E. ompilation error
Answer» C. [1] = 2
Discussion
16.

Find the output of the following program.void main(){int i=10;/* assume address of i is 0x1234ABCD */int *ip=&i;int **ipp=&&i;printf("%x,%x,%x", &i, ip, *ipp);}

A. x1234ABCD, 0x1234ABCD, 10
B. x1234ABCD, 0x1234ABCD, 0x1234ABCD
C. x1234ABCD, 10, 10
D. yntax error
E. untime error
Answer» E. untime error
Discussion
17.

Find the output of the following program.void main(){printf("%d, %d", sizeof(int *), sizeof(int **));}

A. , 0
B. , 2
C. , 2
D. , 4
E. , 4
Answer» D. , 4
Discussion
18.

A function 'p' that accepts a pointer to a character as argument and returns a pointer to an array of integer can be declared as

A. nt(*p(char *))[]
B. nt *p(char *)[]
C. nt (*p) (char *)[]
D. one of these.
Answer» B. nt *p(char *)[]
Discussion
19.

#includevoid main(){int *ptr, a=10;ptr = &a;*ptr += 1;printf("%d, %d", *ptr, a);}

A. 0, 10
B. 0, 11
C. 1, 10
D. 1, 11
Answer» E.
Discussion
20.

Comment on the following?const int *ptr;

A. e cannot change the value pointed by ptr.
B. e cannot change the pointer ptr itself.
C. oth of the above
D. e can change the pointer as well as the value pointed by it.
Answer» B. e cannot change the pointer ptr itself.
Discussion
21.

The declarationint (*p) [5];means

A. is one dimensional array of size 5, of pointers to integers.
B. is a pointer to a 5 elements integer array.
C. he same as int*p[
D. one of these.
Answer» C. he same as int*p[
Discussion
22.

The operator>and

A. he pointers point to data of similar type.
B. he pointers point to structure of similar data type.
C. he pointers point to elements of the same array.
D. one of these.
Answer» D. one of these.
Discussion
23.

What will be the output of the following program code?#include void main(){int i=3, *j, **k;j = &i;k = &j;printf("%d%d%d", *j, **k, *(*k));}

A. 44
B. 00
C. 33
D. 33
E. arbage Value
Answer» D. 33
Discussion
24.

What will be printed after compiling and running the following code?main(){char *p;printf("%d %d",sizeof(*p), sizeof(p));}

A. 1
B. 2
C. 1
D. 2
Answer» C. 1
Discussion
25.

What will be the output of the following program code?#includevoid main(){int i = 10;void *p = &i;printf("%f", *(float *)p);}

A. rror
B. 0
C. 0
D. one of these.
Answer» D. one of these.
Discussion
26.

What will be the output of the following program?#includevoid main(){int i = 10;void *p = &i;printf("%d\n", (int)*p);}

A. ompiler time error
B. egmentation fault/runtime crash
C. 0
D. ndefined behavior
Answer» B. egmentation fault/runtime crash
Discussion
27.

The statementint **a;

A. s illegal
B. s legal but meaningless
C. s syntactically and semantically correct
D. one of these.
Answer» D. one of these.
Discussion
28.

Determine output:#include void main(){char *p = NULL;char *q = 0;if(p)printf(" p ");elseprintf("nullp");if(q)printf("q");elseprintf(" nullq");}

A. q
B. epends on the compiler
C. nullq where x can be p or nullp depending on the value of NULL
D. ullp nullq
Answer» E.
Discussion
29.

Comment on the following pointer declaration?int *ptr, p;

A. tr is a pointer to integer, p is not.
B. tr and p, both are pointers to integer.
C. tr is pointer to integer, p may or may not be.
D. tr and p both are not pointers to integer.
Answer» B. tr and p, both are pointers to integer.
Discussion
30.

Choose the best answer.Prior to using a pointer variable

A. t should be declared.
B. t should be initialized.
C. t should be both declared and initialized.
D. one of these.
Answer» D. one of these.
Discussion
31.

Determine Output:main(){char *str1 = "abcd";char str2[] = "abcd";printf("%d %d %d", sizeof(str1), sizeof(str2), sizeof("abcd"));}

A. 5 5
B. 4 4
C. 5 5
D. 4 5
Answer» D. 4 5
Discussion
32.

Determine Output:void main(){char far *farther, *farthest;printf("%d..%d", sizeof(farther), sizeof(farthest));}

A. ..2
B. ..2
C. ..4
D. ..4
Answer» B. ..2
Discussion
33.

WHICH_SYNTAX_DOESN‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•T_EXECUTE/IS_FALSE_WHEN_EXECUTED??$#

A. if(&object != this)
B. if(&function !=object)
C. this.if(!this)
D. this.function(!this)
Answer» B. if(&function !=object)
Discussion
34.

WHICH_AMONG_THE_FOLLOWING_IS_TRUE??$

A. This pointer can be used to guard against any kind of reference
B. This pointer can be used to guard against self-reference
C. This pointer can be used to guard from other pointers
D. This pointer can be used to guard from parameter referencing
Answer» C. This pointer can be used to guard from other pointers
Discussion
35.

Earlier implementations of C++ ___________________$

A. Never allowed assignment to this pointer
B. Allowed no assignment to this pointer
C. Allowed assignments to this pointer
D. Never allowed assignment to any pointer
Answer» D. Never allowed assignment to any pointer
Discussion
36.

The this pointers _____________________$

A. Are modifiable
B. Can be assigned any value
C. Are made variables
D. Are non-modifiable
Answer» E.
Discussion
37.

The address of the object ________________?

A. Can’t be accessed from inside the function
B. Can’t be accessed in the program
C. Is available inside the member function using this pointer
D. Can be accessed using the object name inside the member function
Answer» D. Can be accessed using the object name inside the member function
Discussion
38.

Whenever non-static member functions are called _______________

A. Address of the object is passed implicitly as an argument
B. Address of the object is passed explicitly as an argument
C. Address is specified globally so that the address is not used again
D. Address is specified as return type of the function
Answer» B. Address of the object is passed explicitly as an argument
Discussion
39.

An object’s this pointer _____________________$

A. Isn’t part of class
B. Isn’t part of program
C. Isn’t part of compiler
D. Isn’t part of object itself
Answer» E.
Discussion