Exercise

1.Which of the following is the correct way to declare a pointer ?

A. int *ptr
B. int ptr
C. int &ptr
D. All of the above

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2.Which of the following gives the [value] stored at the address pointed to by the pointer : ptr?

A. Value(ptr)
B. ptr
C. &ptr
D. *ptr

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3.A pointer can be initialized with

A. Null
B. Zero
C. Address of an object of same type
D. All of them

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4.Choose the right option
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. none of the above

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5.Generic pointers can be declared with__________ .

A. auto
B. void
C. asm
D. None of the above

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6.What is size of generic pointer in c?

A. 0
B. 1
C. 2
D. Null

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7.Which from the following is not a correct way to pass a pointer to a function?

A. Non-constant pointer to non-constant data
B. A non-constant pointer to constant data
C. A constant pointer to non-constant data
D. All of them

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8.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

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9.A void pointer cannot point to which of these?

A. Methods in c++
B. Class member in c++
C. Both A & B
D. None of the above

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10. Referencing a value through a pointer is called

A. Direct calling
B. Indirection
C. Pointer referencing
D. All of the above

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11.The correct statement for 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 is

A. int **fun(float**, char**)
B. int *fun(float*, char*)
C. int ***fun(float*, char**)
D. int ***fun(*float, **char)

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12.The pointer can point to any variable that is not declared with which of these?

A. Const
B. Volatile
C. Both A & B
D. Static

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13.Which operator returns the address of unallocated blocks in memory?

A. The delete operator
B. The empty operator
C. The new operator
D. All of them

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14.Which of the following is illegal?

A. int *ip;
B. string s, *sp = 0;
C. int i; double* dp = &i;
D. int *pi = 0;

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15.Which one of the following is not a possible state for a pointer?

A. Hold the address of the specific object
B. Point one past the end of an object
C. Zero
D. Point to a tye

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16.A pointer contains __________.

A. Address of a variable
B. Name of the variable
C. Value of the variable
D. None of the above

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17. Which of the following are not a member dereferencing operators in CPP?
1. *
2. ::
3. ->*
4. ::*
5. ->

A. Only 1, 2, 4
B. Only 1 and 5
C. Only 2 and 5
D. Only 3,4,5

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18.What is meaning of 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 array.
D. p is pointer to array of function.

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19.What will happen in this code?
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

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20.Choose the right option
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 pointer to string types
D. None of the above

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21.Which is true for b, if b is defined as “int *b[10];”?

A. The definition only allocates 10 pointers and does not initialize them
B. Initialization must be done explicitly
C. The definition only allocates 10 pointers and does not initialize them & Initialization must be done explicitly
D. Error

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