Question 1

An array name is a pointer constant because the address it represents cannot be changed during run- time.

Accepted Answer

A) True 
 B)False

Question 2

If s is a structure variable and p, a pointer, is a member of the structure, the statement cout  will

Accepted Answer

A)  output the value stored in s.
B)  output the dereferenced value pointed to by p.
C)  output the address stored in p.
D)  result in a compiler error.
E)  None of the above

Question 3

Which of the following statements correctly deletes a dynamically- allocated array pointed to by p?

Accepted Answer

A)  delete [ ] p;
B)  delete array p;
C)  delete p;
D)  p delete[ ];
E)  None of the above

Question 4

C++ does not perform array bounds checking.

Accepted Answer

A) True 
 B)False

Question 5

The statement int *ptr = new int; acquires memory to hold an integer and then

Accepted Answer

A)  creates a new pointer called int.
B)  sets ptr to point to the allocated memory.
C)  initializes the allocated memory to 0.
D)  assigns an integer value to the variable called ptr.
E)  None of the above

Question 6

A pointer variable is designed to store

Accepted Answer

A)  a memory address.
B)  an integer.
C)  any legal C++ value.
D)  only floating- point values.
E)  None of the above

Question 7

When you work with a dereferenced pointer, you are actually working with

Accepted Answer

A)  a copy of the value pointed to by the pointer variable.
B)  a variable whose memory has been deallocated.
C)  the variable whose address is stored in the pointer variable.
D)  All of the above
E)  None of the above

Question 8

can be used as pointers.

Accepted Answer

A)  C++ string objects
B)  Punctuation marks
C)  Array names
D)  All of the above
E)  None of the above

Question 9

The statement cout << *ptr; will output

Accepted Answer

A)  the address of the variable stored in ptr.
B)  the string "*ptr".
C)  the value stored in the variable whose address is contained in ptr.
D)  the address of the variable whose address is stored in ptr.
E)  None of the above

Question 10

With pointer variables, you can manipulate data stored in other variables.

Accepted Answer

A)  seldom
B)  never
C)  indirectly
D)  All of the above
E)  None of the above

Question 11

The ampersand (&)is used to dereference a pointer variable in C++.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements is not valid C++ code?

Accepted Answer

A)  float num1 = &ptr2;
B)  int ptr = &num1;
C)  int ptr = int *num1;
D)  All of the above are valid.
E)  All of the above are invalid.

Question 13

The code segment int *ptr; has the same meaning as

Accepted Answer

A)  int* ptr;.
B)  int ptr*;.
C)  *int ptr;.
D)  int ptr;.
E)  None of the above

Question 14

The statement double *num;

Accepted Answer

A)  defines a pointer variable called num.
B)  defines a variable of type double called num.
C)  initializes a variable called *num.
D)  defines and initializes a pointer variable called num.
E)  None of the above

Question 15

The statement cin >> *p;

Accepted Answer

A)  stores the keyboard input into the variable pointed to by p.
B)  is illegal in C++.
C)  stores the keyboard input into the pointer called p.
D)  stores the keyboard input into the variable p.
E)  None of the above

Question 16

Any time you use the new operator, it is good practice to

Accepted Answer

A)  clear the data from the old operator
B)  use a preprocessor directive.
C)  use delete afterwards to free the memory allocated by new.
D)  All of the above
E)  None of the above

Question 17

The statement cout << &num1; will output

Accepted Answer

A)  the memory address of the variable called num1.
B)  the value stored in the variable called num1.
C)  the number 1.
D)  the string "&num1".
E)  None of the above

Question 18

Assuming that arris an array identifier, the statement sum += *arr;

Accepted Answer

A)  will always result in a compiler error.
B)  is illegal in C++.
C)  adds the address of the pointer arr to sum.
D)  adds the value stored in arr[0] to sum.
E)  None of the above

Question 19

A pointer variable may be initialized with

Accepted Answer

A)  the address of an existing variable of the appropriate type.
B)  any non- zero integer value.
C)  A and B are both true.
D)  None of the above

Question 20

Which arithmetic operations can be performed on pointers?

Accepted Answer

A)  Multiplication, division, addition, and subtraction
B)  Addition , subtraction , preincrement, and postincrement
C)  Only multiplication and addition
D)  All arithmetic operations that are legal in C++
E)  None of the above

Exam 10: Pointers

Which arithmetic operations can be performed on pointers?

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The statement cout << &num1; will output

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The statement int *ptr = new int; acquires memory to hold an integer and then

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When you work with a dereferenced pointer, you are actually working with

Correct AnswerverifiedShow Answer

C++ does not perform array bounds checking.

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The code segment int *ptr; has the same meaning as

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can be used as pointers.

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Any time you use the new operator, it is good practice to

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If s is a structure variable and p, a pointer, is a member of the structure, the statement cout << *s.p; will

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The statement cin >> *p;

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A pointer variable may be initialized with

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Which of the following statements correctly deletes a dynamically- allocated array pointed to by p?

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The statement cout << *ptr; will output

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Assuming that arris an array identifier, the statement sum += *arr;

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A pointer variable is designed to store

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The ampersand (&)is used to dereference a pointer variable in C++.

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The statement double *num;

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Which of the following statements is not valid C++ code?

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With pointer variables, you can manipulate data stored in other variables.

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An array name is a pointer constant because the address it represents cannot be changed during run- time.

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If s is a structure variable and p, a pointer, is a member of the structure, the statement ^{cout << *s.p;}will

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