OOP MCQ - CS-Student.com

Welcome CS-Student.com. This is a quiz on Object Oriented Programming for C++.

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Table of content for C++ OOP MCQ (247 total)

Memory (5 questions)
Fundamentals (18 questions)
Constants & Data Types (12 questions)
Decision making & loops (20 questions)
Operators & expressions (6 questions)
Functions (13 questions)
Structures (14 questions)
Arrays & strings (13 questions)
Pointers (22 questions)
OOPs concepts (124 questions)

Topic: Memory

1. On which memory segment is dynamic memory allocated in C++?

A) Stack

B) Static

C) Heap

D) Program code

2. In which memory location is the variable 'i' stored?

Int main() {
int i =10;
cout << &i << endl;
return 0;
}

A) Stack

B) Static

C) Heap

D) Program code

3. Dynamic memory allocated on the heap is not deallocated in this example. Where should it be deallocated?

#include <iostream>
using namespace std;
int* addOnetoX(int x){
int res = x+1;
int *h = new int;
*h = res;
return h;
}

int main() {
int x = 100;
int *p = addOnetoX(x);
cout << *p << endl;
return 0;
}

A) By deleting ‘h’ in function addOnetoX

B) By deleting ‘p’ in the main

C) Both of the above

4. Where is h stored in the following example?

#include <iostream>
using namespace std;

int* addOnetoX(int x){
int res = x+1;
int *h = new int;
*h = res;
return h;
}

int main() {
int x = 100;
int *p = addOnetoX(x);
cout << *p << endl;
return 0;
}

A) The stack

B) The heap

C) Both

5. Where is h and x stored in the following example?

#include <iostream>
using namespace std;

int main() {
int *h = new int(2);
int x=0;
cout << h << endl;
cout << &h << endl;
cout << &x << endl;
delete h;
return 0;
}

A) Both in the Stack

B) h in the Stack and x in the Heap

C) h in the Heap and x in the Stack

D) Both in the Heap

1 out of 9

Topic: Fundamentals

1. Which of the following is the correct syntax of including a user defined header files in C++?

A) #include <userdefined.h>

B) #include <userdefined>

C) #include “userdefined”

D) #include [userdefined]

2. Which of the following is called address operator?

A) *

B) &

C) _

D) %

3. Which of the following is used for comments in C++?

A) // comment

B) /* comment */

C) both // comment or /* comment */

D) // comment */

4. What are the actual parameters in C++?

A) Parameters with which functions are called

B) Parameters which are used in the definition of a function

C) Variables other than passed parameters in a function

D) Variables that are never used in the function

5. Which function is used to read a single character from the console in C++?

A) cin.get(ch)

B) getline(ch)

C) read(ch)

D) scanf(ch)

6. Which function is used to write a single character to console in C++?

A) cout.put(ch)

B) cout.putline(ch)

C) write(ch)

D) printf(ch)

7. What is a constant that contains a single character enclosed within single quotes?

A) Numeric

B) Fixed

C) Character

D) Floating Point

8. A C++ code line ends with ___

A) A Semicolon (;)

B) A Fullstop(.)

C) A Comma (,)

D) A Slash (/)

9. What are the escape sequences?

A) Set of characters that convey special meaning in a program

B) Set of characters that whose use are avoided in C++ programs

C) Set of characters that are used in the name of the main function of the program

D) Set of characters that are avoided in cout statements

10. Which of the following escape sequence represents carriage return?

A) \r

B) \n

C) \n\r

D) \c

11. Which of the following escape sequence represents tab?

A) \t

B) \t\r

C) \b

D) \a

12. Which of the following is called insertion/put to operator?

A) >>

B) <<

C) >

D) <

13. Which of the following is called extraction/get from operator?

A) <<

B) >>

C) >

D) <

14. What is the size of a boolean variable in C++?

A) 1 bit

B) 1 byte

C) 4 bytes

D) 2 bytes

15. Which of the following is an exit-controlled loop?

A) for

B) while

C) do-while

D) all of the mentioned

16. Which of the following is an entry-controlled loop?

A) for

B) while

C) do-while

D) both while and for

17.In which part of the for loop termination condition is checked? for(I;II;III)

A) I

B) II

C) III

D) IV

18. Which of the following is the scope resolution operator?

A) .

B) *

C) ::

D) ~

2 out of 9

Topic: Constants & data types

1. Which data type is used to represent the absence of parameters?

A) int

B) short

C) void

D) float

2. How the constants are declared?

A) const keyword

B) #define preprocessor

C) both a and b

D) None of these

3. Which type is best suited to represent the logical values?

A) int

B) bool

C) char

D) float

4. Identify the user-defined types from the following?

A) enumeration

B) classes

C) both enumeration and classes

D) int

5. Which of the following statements are true for the function f : int f (float)?

A) f is a function taking an argument of type int and returning a floating-point number

B) f is a function taking an argument of type float and returning an integer

C) f is a function of type float

D) f is a function of type int

6. How many characters are specified in the ASCII scheme?

A) 64

B) 128

C) 256

D) 24

7. Given the variables p, q are of char type and r, s, t are of int type. Select the right statement?

1. t = (r * s) / (r + s);
2. t = (p * q) / (r + s);

A) 1 is true but 2 is false

B) 1 is false and 2 is true

C) both 1 and 2 are true

D) both 1 and 2 are false

8. Suppose in a hypothetical machine, the size of char is 32 bits. What would sizeof(char) return?

A) 4

B) 1

C) Implementation dependent

D) Machine dependent

9. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int x = -1;
unsigned int y = 2;

if (x > y) {
cout << "x is greater: " ;
}
else
{
cout << "y is greater: " ;
}
return 0;
}

A) x is greater

B) y is greater

C) implementation defined

D) arbitrary

10. 0326, 786427373824, ‘x’ and 0X2f are _____ _____ ____ and _____ literals respectively.

A) decimal, character, octal, hexadecimal

B) octal, hexadecimal, character, decimal

C) hexadecimal, octal, decimal, character

D) octal, decimal, character, hexadecimal

11. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int x = 8;
cout << "ANDing integer 'x' with 'true' : " << (x && true);
return 0;
}

A) ANDing integer ‘x’ with ‘true’ :8

B) ANDing integer ‘x’ with ‘true’ :0

C) ANDing integer ‘x’ with ‘true’ :1

D) ANDing integer ‘x’ with ‘true’ :9

12. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int i = 3;
int l = i / -2;
int k = i % -2;
cout << l << ‘ ‘ << k ;
return 0;
}

A) compile time error

B) -1 1

C) 1 -1

D) implementation defined

3 out of 9

Topic: Decision making & loops

1. How many sequences of statements present in C++?

A) 4

B) 3

C) 5

D) 6

2. What will be the output of the following C++ code?

#include
using namespace std;
int main() {
if (0) {
cout << "Hello" ;
}
else
{
cout << "Good Bye" ;
}
return 0;
}

A) Hello

B) Good Bye

C) HelloGood bye

D) Compilation Error

3. if you have to make decision based on multiple choices, which of the following is best suited?

A) if

B) if-else

C) if-else-if

D) All of the above

4. Can we use string inside switch statement?

A) Yes

B) No

5. In situations where we need to execute body of the loop before testing the condition, we should use_____.

A) For loop

B) While loop

C) Do-while loop

D) nested for loop

6. Loops in C++ Language are implemented using?

A) While loop

B) For loop

C) Do while loop

D) All of the above

7. Which following loop is faster in C++ Language?

A) For

B) while

C) do-while

D) All work at same speed

8. What is the way to suddenly come out of or quit any loop in C++?

A) continue; statement

B) break; statement

C) leave; statement

D) quit; statement

9. The if…else statement can be replaced by which operator?

A) Bitwise operator

B) Conditional operator

C) Multiplicative operator

D) Addition operator

10. The switch statement is also called as?

A) choosing structure

B) selective structure

C) certain structure

D) bitwise structure

11. Choose a correct C++ for loop syntax.

A) for(initalization; condition; inc/dec){ // statements };

B) for(declaration; condition; incrementoperation){ // statements };

C) for(declaration; incrementoperation; condition){ // statements };

D) for(initalization; condition; incrementoperation){ // statements };

12. Choose a correct C++ do while syntax.

A) dowhile(condition){ // statements };

B) do while(condition){ // statements };

C) do{ // statements }while(condition)

D) do{ // statements }while(condition);

13. Choose a correct C++ Statement.

A) a++ is (a= a+1) POST INCREMENT operator

B) a– is (a = a-1) POST DECREMENT operator. –a is (a = a-1) PRE DECREMENT operator

C) ++a is (a = a+1) PRE INCREMENT operator

D) All of the above.

14. A switch statement can be used with which of the following types of variable?

A) int

B) int, char

C) int, float, char

D) Any basic datatype

15. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int n ;
for (n = 5; n > 0; n–)
{
cout << n;
if (n == 3)
break;
}
return 0;
}

A) 543

B) 54

C) 5432

D) 53

16. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int n = 15;
for (;;) {
cout << n;
}
return 0;
}

A) error

B) 15

C) infinite times of printing n

D) none of the mentioned

17. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int I ;
for (i = 0; i < 10; i++);
{
cout << i;
}
return 0;
}

A) 0123456789

B) 10

C) 012345678910

D) compile time error

18. Which looping process is best used when the number of iterations is known?

A) While loop

B) For loop

C) Do while loop

D) all looping processes require that the iterations be known

19. Which of the following is optional in switch construct?

A) Expression in ( ) after switch

B) default

C) case followed by value

20. What is the effect of writing a break statement inside a loop?

A) It cancels remaining iterations.

B) It skips a particular iteration.

C) The program terminates immediately.

D) Loop counter is reset.

4 out of 9

Topic: Operators & Expressions (+-*/,?,++,–)

1. In which direction does the assignment operation will take place?

A) left to right

B) right to left

C) top to bottom

D) bottom to top

2. What is this operator "?:" called ?

A) conditional

B) relational

C) casting operator

D) unrelational

3. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int a, b, c;
a = 2;
b = 7;
c = (a > b) ? a : b;
cout << c;
return 0;
}

A) 2

B) 7

C) 9

D) 14

4. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int a;
a = 5 + 3 * 5;
cout << a;
return 0;
}

A) 35

B) 20

C) 25

D) 30

5. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int i, j;
j = 10;
i = (j++, j + 100, 999 + j);
cout << i;
return 0;
}

A) 1000

B) 11

C) 1010

D) 1001

6. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int x, y;
x = 2;
y = ++x * ++x;
cout << x << y;
y = x++ * x++;
cout << x << y;
y = ++x * x++;
cout << x << y;
y = x++ * ++x;
cout << x << y;
return 0;
}

A) 416 620 856 1080

B) 412 625 842 1072

C) 412 630 864 1080

D) 416 625 864 1072

5 out of 9

Topic: Functions

1. Where does the execution of the program starts?

A) user-defined function

B) main function

C) void function

D) else function

2. What are mandatory parts in the function declaration?

A) return type, function name

B) return type, function name, parameters

C) parameters, function name

D) parameters, variables

3. which of the following is used to terminate the function declaration?

A) :

B) )

C) ;

D) ]

4. Which is more effective while calling the functions?

A) call by value

B) call by reference

C) call by pointer

D) call by object

5. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
void fun(int x, int y){
x = 20;
y = 10;
}

int main() {
int x = 10;
fun (x, x);
cout << x;
return 0;
}

A) 10

B) 20

C) compile time error

D) 30

6. What is the scope of the variable declared in the user defined function?

A) whole program

B) only inside the {} block

C) the main function

D) header section

7. How many minimum number of functions should be present in a C++ program for its execution?

A) 0

B) 1

C) 2

D) 3

8. Which of the following is the default return value of functions in C++?

A) int

B) char

C) float

D) void

9. When do we define the default values for a function?

A) When a function is defined

B) When a function is declared

C) When the scope of the function is over

D) When a function is called

10. Where should default parameters appear in a function prototype?

A) To the rightmost side of the parameter list

B) To the leftmost side of the parameter list

C) Anywhere inside the parameter list

D) Middle of the parameter list

11. Which of the following feature is used in function overloading and function with default argument?

A) Encapsulation

B) Polymorphism

C) Abstraction

D) Modularity

12. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int fun(int x = 0, int y = 0, int z){
return (x + y + z);
}

int main() {
cout << fun(10);
return 0;
}

A) 10

B) 0

C) Error

D) Segmentation fault

13. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int fun(int = 0, int = 0); //define a function
int main() {
cout << fun(5);
return 0;
}

int fun(int x, int y){ //declare a function
return (x + y);
}

A) -5

B) 0

C) 10

D) 5

6 out of 9

Topic: Structure

1. The data elements in the structure are also known as …..

A) objects

B) members

C) data

D) objects & data

2. What will be used when terminating a structure?

A) :

B) }

C) ;

D) ;;

3. What will happen when the structure is declared?

A) it will not allocate any memory

B) it will allocate the memory

C) it will be declared and initialized

D) it will be declared

4. What will be the output of the following C++ code?

#include <iostream>
#include <string.h>
using namespace std;
int main() {
int student{
int num;
char name[25];
}
student stu; //structure object
stu.num = 123;
strcpy(stu.name, “john”);
cout << stu.num << “ “;
cout << stu.name << endl;
return 0;
}

A) 123 john

B) john john

C) compile time error

D) runtime error

5. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

struct Time{
int hours, minutes, seconds;
};

int toSeconds (Time now){
return 3600 * now.hours + 60 * now.minutes + now.seconds;
}

int main() {
Time t;
t.hours = 5;
t.minutes = 30;
t.seconds = 45;
cout << "Total seconds: " << toSeconds(t) << endl;
return 0;
}

A) 19845

B) 20000

C) 15000

D) 19844

6. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
struct ShoeType{
string style;
double price;
};
ShoeType shoe1, shoe2;
shoe1.style = “Adidas”;
shoe1.price = 9.99;
cout << shoe1.style << "$" << shoe1.price;
shoe2 = shoe1;
shoe2.price = shoe2.price / 9;
cout << shoe2.style << "$" << shoe2.price;
return 0;
}

A) Adidas $ 9.99Adidas $ 1.11

B) Adidas $ 9.99Adidas $ 9.11

C) Adidas $ 9.99Adidas $ 11.11

D) Adidas $ 11.11Adidas $ 11.11

7. What will be the output of the following C++ code?

#include
using namespace std;

struct sec{
int a;
char b;
};

int main() {
sec s = {25, 50}; //ASCII 50 is ‘2’
sec *ps = &s;
cout < a << ',' < b ;
return 0;
}

A) 25,2

B) 25,3

C) 25,4

D) 26,2

8. Which of the following is a properly defined structure?

A) struct {int a;}

B) struct a_struct {int a;}

C) struct a_struct int a;

D) struct a_struct {int a;};

9. Which of the following accesses a variable in structure *b?

A) b->var;

B) b.var;

C) b-var;

D) b>var;

10. Which is the output?

struct Book{
string title;
string author;
int year;
int book_id;
};

int main(){
Book b1, b2;
b1.title = “Book1”;
b2 = b1;
cout << b2.title << endl;
return 0;
}

A) Error

B) Book1

C) Book2

D) b2

11. Which is the output?

struct Book{
string title;
string author;
int year;
int* book_id = new int;
};

int main(){
Book b1, b2;
*b1.book_id = 100;
b2 = b1;
cout << *b2.book_id << endl;

return 0;
}

A) Error

B) 0

C) 100

D) b2

12. Which is the output?

#include <iostream>
using namespace std;
struct Book{
int* book_id = new int;
};

int main() {
Book b1, b2;
*b1.book_id = 100;
b2 = b1;
cout << *b2.book_id << " ";
*b1.book_id = 500;
cout << *b2.book_id << endl;
return 0;
}

A) Error

B) 100 100

C) 100 500

D) 500 500

13. Which is the output?

#include <iostream>
using namespace std;

struct Book{
string title;
};

int main() {
Book* b1;
b1->title = “Book1”;
cout <title << endl;
return 0;
}

A) Book1

B) Error

14. Which is the output?

#include <iostream>
using namespace std;

struct Book{
string title;
};

int main() {
Book* b1 = new Book[2];
Book* b2 = new Book[2];
b1[0].title = “Book11”;
b1[1].title = “Book12”;
b2[0].title = “Book21”;
b2[1].title = “Book22”;
b2=b1;
cout << b2[1].title << endl;
return 0;
}

A) Book11

B) Book12

C) Book21

D) Book22

7 out of 9

Topic: Array & strings

1. Which of the following correctly declares an array?

A) int array[10];

B) int array;

C) array{10};

D) array array[10];

2. What is the index number of the last element of an array with 9 elements?

A) 9

B) 8

C) 0

D) Programmer-defined

3. What is the correct definition of an array?

A) An array is a series of elements of the same type in contiguous memory locations

B) An array is a series of element

C) An array is a series of elements of the same type placed in non-contiguous memory locations

D) An array is an element of the different type

4. Which of the following gives the memory address of the first element in array?

A) array[0];

B) array[1];

C) array(2);

D) array;

5. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int array1[] = {1200, 200, 2300, 1230, 1543};
int array2[] = {12, 14, 16, 18, 20};
int temp, result = 0;

int main() {
for (temp = 0; temp < 5; temp++){
result += array1[temp];
}
for (temp = 0; temp < 4; temp++){
result += array2[temp];
}
cout << result;
return 0;
}

A) 6553

B) 6533

C) 6522

D) 12200

6. Which of the following accesses the seventh element stored in array?

A) array[6];

B) array[7];

C) array(7);

D) array;

7. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
int a = 5, b = 10, c = 15;
int arr[3] = {&a, &b, &c};
cout << *arr[*arr[1] – 0];
return 0;
}

A) 15

B) 18

C) garbage value

D) compile time error

8. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
char str[5] = “ABC”;
cout << str[3];
cout << str;
return 0;
}

A) ABC

B) ABCD

C) AB

D) AC

9. What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() {
char array[] = {10, 20, 30};
cout << -2[array];
return 0;
}

A) -15

B) -30

C) compile time error

D) garbage value

10. Which header file is used to manipulate the string?

A) iostream

B) iomanip

C) string

D) container

11. What is the difference between unsigned int length() and unsigned int size() of an array?

A) Returns a different value

B) They are same

C) Returns a different value but they are same

D) Returns a length

12. What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;

int main() {
string str =”Steve jobs founded the apple”;
string str2 =”apple”;
unsigned found = str.find(str2);
if (found != string :: npos){
cout << found << "\n";
}
return 0;
}

A) apple

B) 12

C) 23

D) Steve jobs founded the

13. What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;

int main() {
string str =”Steve jobs”;
unsigned long int found = str.find_first_of(“aeiou”);
while (found <= str.length())
{
str[found] = ‘*’;
found = str.find_first_of(“aeiou”, found + 1);
}
cout << str << "\n";
return 0;
}

A) Steve

B) jobs

C) St*v* j*bs

D) St*v*

8 out of 9

Topic: pointers

1. What does the following statement mean?

int (*fp) (char*);

A) pointer to a pointer

B) pointer to an array of chars

C) pointer to function taking a char* argument and returns an int

D) function taking a char* argument and returning a pointer to int

2. Which statement has the correct description of the following C++ declaration?

string* x, y;

A) x is a pointer to a string, y is a string

B) y is a pointer to a string, x is a string

C) both x and y are pointers to string types

D) y is a pointer to a string

3. What will happen in the following C++ code snippet?

int a =100, b =200;
int *p = &a, *q = &b ;
p = q

A) b is assigned to a

B) p now points to b

C) a is assigned to b

D) q now points to a

4. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
int a = 5, b = 10, c = 15;
int *arr[] = {&a, &b, &c};
cout << arr[1];
return 0;
}

A) 5

B) 10

C) 15

D) it will return an address

5. Which answer decribes correctly a function that takes pointer to a float, a pointer to a pointer to a char and returns a pointer to a pointer to a integer?

A) int **fun(float**, char**)

B) int *fun(float*, char*)

C) int **fun(float*, char**)

D) int ***fun(*float, **char)

6. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
char arr[20];
int i;
for (i = 0; i < 10; i++){
*(arr + i) = 65 + i; //65 is ASCII ‘A’
}
*(arr + i) = ‘\0’;
cout << arr;
return 0;
}

A) ABCDEFGHIJ

B) AAAAAAAAAA

C) JJJJJJJJ

D) AAAAAAJJJJ

7. What will be the output of the following C++ code?

#include
using namespace std;

int main() {
char str[] = “abcdefg”;
char str2[] = {‘a’,’b’,’c’,’d’};
char str3[] = {‘A’,’B’,’C’,’D’,0};
char str4[] = {65,66,67,0};
int num[] = {1,3,5,7,9};
cout << str << ' ';
cout << str[5] << ' ';
cout << str2 << ' ';
cout << str2[2] << ' ';
cout << str3 << ' ';
cout << str3[2] << ' ';
cout << str4 << ' ';
cout << str4[2] << ' ';
cout << num << ' ';
cout << num[1] << endl;
return 0;
}

A) abcdefg f abcdabcdefg c ABCD C ABC C 0x61fdf0 3

B) abcdefg f abcd c ABCD C ABC C 0x61fdf0 3

C) 0x61dfee f 0x61df77 c 0x624589 C 0x63d56e C 0x61fdf0 3

D) 0x61dfee f 0x61df77 c 0x624589 C 0x63d56e C 13579 3

8. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
char *ptr;
char str[] = “abcdefg”;
ptr = str;
ptr += 5;
cout << ptr;
return 0;
}

A) fg

B) cdef

C) defg

D) abcd

9. What is the meaning of the following declaration?

int (*p [5]) ();

A) p is pointer to function

B) p is array of pointer to function

C) p is pointer to such function which return type is the array

D) p is pointer to array of function

10. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << *p;
return 0;
}

A) 4

B) 5

C) 6

D) 7

11. What will happen in the following C++ code snippet?

#include <iostream>
using namespace std;

int main() {
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << arr;
return 0;
}

A) 4

B) 5

C) address of arr

D) 7

12. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
int numbers[5];
int *p;
p = numbers; *p = 10;
p++; *p = 20;
p = numbers[2]; *p = 30;
p = numbers + 3; *p = 40;
p = numbers; *(p + 4) = 50;
for (int n = 0; n < 5; n++){
cout << numbers[n] << ",";
}
return 0;
}

A) 10,20,30,40,50,

B) 1020304050

C) compile error

D) runtime error

13. What will be the output of the following C++ code?

#include <iostream>
using namespace std;

int main() {
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << *arr + 9;
return 0;
}

A) 12

B) 5

C) 13

D) error

14. The void pointer can point to which type of objects?

A) int

B) float

C) double

D) all of the mentioned

15. When does the void pointer can be dereferenced?

A) when it doesn’t point to any value

B) when it cast to another type of object

C) using delete keyword

D) using shift keyword

16. What is the value of x after calling addOnetoX?

#include <iostream>
using namespace std;

void addOnetoX(int x) {
x = x + 1;
}

int main() {
int x = 100;
addOnetoX(x);
cout << x << endl;
return 0;
}

A) 0

B) 101

C) 100

D) Error

17. What is the value of x after calling addOnetoX?

#include <iostream>
using namespace std;

void addOnetoX(int*p) {
*p = *p + 1;
}

int main() {
int x = 100;
addOnetoX(&x);
cout << x << endl;
return 0;
}

A) 0

B) 101

C) 100

D) Error

9 out of 9