Prepared by Mohammed SikanderTechnical LeadCranes Varsity

This presentation consists of set of questions which on solving and reasoning will help you to understand the concepts clearly.

Topics include

Pointers

References

Function Overloading

Default arguments

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void update(int *ptr){

*ptr++;}

int main( ){

int a = 5;update(&a);cout << a << endl;

}

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void myswap(int *pa , int *pb){

int *temp = pa;pa = pb;pb = temp;printf("MySwap *pa = %d *pb = %d \n",*pa , *pb);

}

int main( ){

int a = 5 , b = 10;myswap(&a , &b);printf("Main a = %d b = %d \n",a , b);

}

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Write the Outputvoid fun(int *ptr){

int b = 10;ptr = &b;printf(“Fun %d \n”,*ptr);

}int main(){

int a = 5;int *ptr = &a;fun(ptr);printf(“Main %d \n“ , *ptr);

}

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Write the Outputvoid fun(int ref){

ref++;cout<<"Fun ref= "<<ref<<endl;

}int main(){

int a = 5;int &ref = a;fun(ref);cout<<"Main ref= "<<ref<<endl;

}

int main() {

int a = 4;const int b = 3;

1. int *ptr1 = &a;2. int *ptr2 = &b;3. int * const ptr3 = &b;4. const int * ptr4 = &b;5. int * const ptr5 = &a;6. const int * ptr6 = &a;

return 0;}

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int main() {

int a = 4;const int b = 3;

1. int &ref1 = a;2. int &ref2 = b;3. const int &ref3 = a;4. const int &ref4 = b;

return 0;}

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int main( ){

int a = 5 , b = 10 ;int c = a + b;int *ptr1 = &a + b;int *ptr2 = &(a + b);

}

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int main( ){

int a = 5 , b = 10 ;int &r1 = a + b;int &r2 = 5;}

Identify the valid and invalid statements.void func(int &a){}int main( ){

int a = 5, b = 10;int c;

1. func(a);2. func(c);3. func(a + b);4. func(5);}

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Identify the valid and invalid statements.void func(const int &a){}int main( ){

int a = 5, b = 10;int c;func(a); //statement 1func(c); //statement 2func(a + b); //statement 3func(5); //statement 4

}

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Can we overload these two functionsvoid func(int *p){}void func(int p){}int main(){}

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Can we overload these two functionsvoid func(int &a){}void func(int a){}int main(){}

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Can we overload these two functionsvoid func(int &a){}void func(const int &a){}int main(){}

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Can we overload these two functionschar func( ){

return 'a';}double func(){

return 10.5;}int main(){

char c = func();double d = func();

}

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What is the outputvoid func(char a){

cout <<"Character " << a << endl;}int main(){

func('A');func('A' + ' '); //A + space

}

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void func(char a){

cout <<"Character " << a << endl;}void func(int a){

cout <<"Integer " << a << endl;}int main(){

func('A'); //Statement 1func('A' + ' '); //Statement 2

}

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int add(int a = 5 , int b = 10);

int main( ){

cout << add( 2 , 6) << endl;

cout << add( 2 ) << endl;

cout << add( ) << endl;}

int add(int a = 5 , int b = 10){

return a + b;}

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Identify the valid and invalid Declarations

void func1(int a = 5 , int b = 10 ,int c = 20);void func2(int a ,int b ,int c = 20);void func3(int a = 5 ,int b ,int c );void func4(int a = 5 ,int b = 10 ,int c );

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void add(int a , int b = 5){

cout << “Add with 2 parameter”;}void add(int x){

cout <<“Add with 1 parameter”;}

int main( ){

add(5);}

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What is the header file to be included if you want to use malloc and free?

What is the header file to be included if you want to use new and delete?

Name some memory leakage detection tools?

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int main( ){

int *ptr = new int(5);return 0;

}

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int *ptr;

void func( )

{

ptr = new int[5];

}

int main( )

{

ptr = new int[5];

func( );

return 0;

}

int main( )

{

int *ptr = new int[5];

return 0;

}