Pointers

21.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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22.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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23.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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24.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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25.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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26. 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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27.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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28.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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29.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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30.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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