CCS0007 Pointers

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Question

Answer

A symbol used to access the value of an address

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When does the void pointer can be dereferenced?

When it cast to another type of object

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What is the output of this program? #include < iostream > using namespace std; int main() { char *ptr; char Str[] = "abcdefg"; ptr = Str; ptr += 5; cout << ptr; return 0; }

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Which of the following is a reference operator?

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What is the output of the following? #include <iostream> using namespace std; int main() { int var = 40; int *ip; ip = &var; cout << *ip << endl; //cout << ""40""; return 0; }"

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What is the output of the following? #include <iostream> using namespace std; int main() { int var = 20; int *ip; ip = &var; cout << *ip << endl; return 0; }

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Which of the following is NOT true about static arrays?

Memory space is allocated at runtime

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Which of the following is NOT true about dynamic arrays?

Memory space is allocated during compile time

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Dynamically allocated memory is allocated on ___________________

Heap

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#include <iostream> using namespace std; int main() { int * foo = new int [5]; foo[0] = 8; cout << foo [0]; delete[] foo; return 0; }

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A symbol used to determine the address of a variable

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What is the output of the following program? #include <iostream> using namespace std; int main() { string food = ""Pizza""; string * ptr = &food; cout << food << "" ""; cout << *ptr << ""\n""; }

Pizza Pizza

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Which of the following is NOT a way to declare a pointer variable?

string mystring *;

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#include <iostream> using namespace std; int main() { string food = ""Pizza""; string* ptr = &food; cout << food << ""\n""; return 0; }

Pizza

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It is a pointer not associated with any data types

void pointer

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What operator is used to free allocated memory?

delete operator

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What is the output of the program? #include <iostream> using namespace std; int main() { int *ptr = new int; int a = 143; ptr = &a; cout << *ptr << endl; return 0; }

143

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#include <iostream> using namespace std; int main() { int *ptr = new int; int a = 143; ptr = &a; cout << ptr << endl; return 0; }

A memory address

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Denotes a request for memory allocation on the Free Store

new operator

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"What is the output of the following? #include <iostream> using namespace std; int main() { int * foo; foo = new int [5]; foo[0] = 1; foo[1] = 2; foo[2] = 3; foo[3] = 4; foo[4] = 5; for (int

1 2 3 4 5

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"What is the output of the following program? #include <iostream> using namespace std; int main() { int n; n = 3; int * p = new int[n]; for (int i = 0; i<n;i++) { p[n] = 10; cout << p[n] <<

10 10 10

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Complete the given code: #include <iostream> using namespace std; int main() { int var1 = 17; cout << ________ << endl; return 0; }

var1

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It stores the memory address as its value.

Pointer

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What is the declaration for the pointer that points to a variable of type int?

int *p;

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Which of the following is NOT true about static arrays?

Memory space is allocated at runtime

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How a static array is declared?

float a [10];

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Which of the following is NOT true about dynamic arrays?

Memory space is allocated during compile time

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What is used for accessing the contents of memory location whose address is stored in a pointer variable?

By applying the dereference operator

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Dynamically allocated memory is allocated on ___________________

Heap

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#include <iostream> using namespace std; int main() { int * foo = new int [5]; foo[0] = 8; cout << foo [0]; delete[] foo; return 0; }

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A symbol used to determine the address of a variable

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What is the output of the following program? #include <iostream> using namespace std; int main() { string food = ""Pizza""; string * ptr = &food; cout << food << "" ""; cout << *ptr << ""\n""; }

Pizza Pizza

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Which of the following is NOT a way to declare a pointer variable?

string mystring *;

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#include <iostream> using namespace std; int main() { string food = ""Pizza""; string* ptr = &food; cout << food << ""\n""; return 0; }

Pizza

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It is a pointer not associated with any data types

void pointer

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What operator is used to free allocated memory?

delete operator

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#include <iostream> using namespace std; int main() { int *ptr = new int; int a = 143; ptr = &a; cout << ptr << endl; return 0; }

A memory address

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Denotes a request for memory allocation on the Free Store

new operator

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#include <iostream> using namespace std; int main() { int n; n = 3; int * p = new int[n]; for (int i = 0; i<n;i++) { p[n] = 10; cout << p[n] << "" ""; } delete []p; return 0; }

10 10 10

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0x7fffe867d790 is an example of:

Memory Address

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What will happen in this code? int a = 100, b = 200; int *p = &a, *q = &b; p = q;

p now points to b

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What is the output of the following? #include <iostream> using namespace std; int main() { int var = 11; int *ip, *ip2; ip = &var; ip2 = ip; cout << *ip << "" "" << *ip2; return 0; }

11 11

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#include <iostream> using namespace std; int main() { int * foo; foo = new int [5]; foo[0] = 1; foo[1] = 2; foo[2] = 3; foo[3] = 4; foo[4] = 5 delete[] foo; cout ; return 0; }

Error

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#include <iostream> using namespace std; int main() { int *p1 = new int(); int *p2 = new int(); int *p3 = new int(); *p1 = 45; p2 = p1; *p3 = *p1+*p2; cout << *p3 << endl; return 0; }

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Choose the right option: string* x, y;

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

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double * p = new double [45]; is an example of:

Dynamic array declaration

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A void pointer can point to which type of objects?

all of the mentioned(any data type)

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To create a dynamic array, you have to use:

all of the given (pointer,array,new operator)

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