CIS C++ Chapter 10 Quiz

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The ___, also known as the address operator, returns the memory address of a variable.

ampersand ( & )

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


The statement:

int *ptr = nullptr;

has the same meaning as ___.

int* ptr = nullptr;

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

the actual value of the variable whose address is stored in the pointer variable

___ can be used as pointers.

Array names

In C++ 11, the ___ key word was introduced to represent the address 0.


What does the following statement do?

double *num2;

Declares a pointer variable named num2.

When the less than ( < ) operator is used between two pointer variables, the expression is testing whether ___.

the address of the first variable comes before the address of the second variable in the computer’s memory

Look at the following statement:

sum += *array++;

This statement ___.

assigns the dereferenced pointer’s value, then increments the pointer’s address

Use the delete operator only on pointers that were ___.

created with the new operator

A function may return a pointer, but the programmer must ensure that the pointer ___.

still points to a valid object after the function ends

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

All of these are invalid. ( int ptr = &num1; int ptr = int *num1; float num1 = &ptr2; )

Which of the following statements deletes memory that has been dynamically allocated for an array?

delete [] array;

When this is placed in front of a variable name, it returns the address of that variable.

ampersand ( & )

What will the following statement output?

cout << &num1;

The memory address of the variable called num1

A pointer variable is designed to store ___.

a memory address

Look at the following statement:

int *ptr = nullptr;

In this statement, what does the word int mean?

ptr is a pointer variable that will store the address of an integer variable.

Assuming ptr is a pointer variable, what will the following statement output?

cout << *ptr;

The value stored in the variable whose address is contained in ptr.

Not all arithmetic operations may be performed on pointers. For example, you cannot ___ or ___ a pointer.

multiply, divide

Which statement displays the address of the variable num1?

cout << &num1;

The following statement:

cin &gt;&gt; *num3;

stores the keyboard input into the variable pointed to by num3

Dynamic memory allocation occurs ___.

when a new variable is created at runtime

The following statement:

int *ptr = new int;

assigns an address to the variable named ptr

If you are using an older compiler that does not support the C++ 11 standard, you should initialize pointers with ___.

the integer 0, or the value NULL

Every byte in the computer’s memory is assigned a unique ___.


If a variable uses more than one byte of memory, for pointer purposes its address is ___.

the address of the first byte of storage

What will the following code output?

int number = 22;

int *var = &amp;number;

cout &lt;&lt; *var &lt;&lt; endl;


What will the following code output?

int *numbers = new int[5];

for (int i = 0; i &lt;= 4; i++)

*(numbers + i) = i;

cout &lt;&lt; numbers[2] &lt;&lt; endl;


Look at the following code:

int numbers[] = {0, 1, 2, 3, 4 };

int *ptr = numbers;


After this code executes, which of the following statements is true?

ptr will hold the address of numbers[1].

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