Deck 10: Pointers

Question 1

The C++ operator * means the address of .

Answer 1

False

Question 2

The asterisk ( * ) symbol is also called the ____ operator.

A) pointer
B) reference
C) increment
D) dereferencing

Answer 2

D

Question 3

The address named as a reference can be altered.

Answer 3

False

Question 4

References are used almost exclusively as formal function parameters and ____ types.

A) object
B) class
C) return
D) constant

Question 5

As each variable is defined in a program, sufficient storage for it is assigned from a pool of computer memory locations made available to the compiler.

Question 6

To use a stored address, C++ provides us with an indirection operator, ____.

A) &
B)
C) *
D) %

Question 7

For each array created, the array name becomes the name of the pointer constant the compiler creates for the array.

Question 8

____ are simply variables used to store memory addresses.

A) Pointers
B) Objects
C) Arrays
D) Vectors

Question 9

Essentially, a(n) ____ is a named constant for an address.

A) pointer
B) reference
C) class
D) indirection

Question 10

When used in declaring reference arguments, the ampersand refers to the data type preceding it.

Question 11

Technically, references are said to be ____.

A) explicitly dereferenced
B) statically dereferenced
C) manually dereferenced
D) automatically dereferenced

Question 12

If a character s address is stored in a pointer, only ____ byte(s) of storage would be retrieved when the address is used.

A) one
B) two
C) four
D) six

Question 13

The delete operator alters the address passed to it.

Question 14

Reference variables are available in C++.

Question 15

A(n) ____ error is produced when an attempt is made to equate a reference to a constant.

A) logic
B) compiler
C) codec
D) executable

Question 16

If the integer s address is stored in a pointer, typically only ____ bytes of storage are retrieved when the address is used.

A) two
B) three
C) four
D) eight

Question 17

Addresses cannot be incremented or decremented.

Question 18

Multiple references cannot be declared in a single statement.

Question 19

To display the address of a variable, you can use C++ s address operator, ____.

A) >>
B) ^
C) ::
D) &

Question 20

The use of a pointer requires the computer to do a double lookup.

Question 21

Pointers must be ____________________ before they can be used to store an address.

Question 22

The C++ ____ operator releases a block of bytes reserved previously.

A) free
B) delete
C) return
D) dealloc

Question 23

The ____ consists of unallocated memory that can be allocated to a program, as requested, while the program is running.

A) pool
B) queue
C) heap
D) stack

Question 24

Pointers to functions are possible because function ____ are themselves pointer constants.

A) classes
B) methods
C) names
D) values

Question 25

Assuming ptNum is a pointer, the statement ____ uses the pointer and then increments it.

A) *++ptNum
B) *ptNum++
C) *ptNum--
D) *--ptNum

Question 26

In contrast to implicitly passing addresses with ____, addresses can be explicitly passed using pointers.

A) extern variables
B) instances
C) static variables
D) references

Question 27

A double typically requires the retrieval of ____________________ bytes of storage.

Question 28

Any address returned by ____ can be used subsequently by ____ to restore reserved memory back to the computer

A) new , delete
B) delete , new
C) * , reset
D) peek , poke

Question 29

There is a direct relationship between array names and ____________________data types.

Question 30

The compiler automatically converts any array subscript used by a programmer to an equivalent ____ expression.

A) reference
B) pointer
C) class
D) object

Question 31

The term ____ describes the condition that occurs when dynamically allocated memory isn t returned explicitly by using the delete operator and the operating system doesn t reclaim allocated memory.

A) stack leak
B) heap leak
C) garbage collection
D) memory leak

Question 32

The 1 in the expression *(gPtr + 1) is a(n) ____.

A) pointer
B) initializer
C) offset
D) register

Question 33

Under a ____ allocation scheme, the amount of storage to be allocated is determined and adjusted at runtime rather than compile time.

A) fixed
B) predefined
C) dynamic
D) static

Question 34

When constructing references, the reference should be of the same data type as the ____________________ to which it refers.

Question 35

A pointer reference can always be replaced with a ____ reference.

A) variable
B) constant
C) class
D) subscript

Question 36

The advantage of using references over using pointers is that the notation is ____.

A) more thorough
B) simpler
C) faster at runtime
D) written in a lower-level language

Question 37

When an array is created, the compiler creates an internal point constant for it automatically and stores the array s ____ in this pointer.

A) length
B) number of elements
C) starting address
D) name

Question 38

When used in a nondeclarative statement, the operator placed in front of a variable s name refers to the ____________________ of the variable.

Question 39

Explicitly passing addresses with the address operator is referred to as a pass by ____.

A) reference
B) value
C) copy
D) image

Question 40

A computer uses an array s ____ to calculate the array element s address based on both the array s starting address and the amount of storage each element uses.

A) subscript
B) reference
C) length
D) operand

Question 41

The ____________________ statement restores an allocated block of storage back to the free storage area (the heap) while a program is running.

Question 42

The 1 in the expression *(gPtr + 1) is a(n) ____________________.

Question 43

For each array created, the array name becomes the name of the pointer ____________________ the compiler creates for the array.

Question 44

____________________ allocation of memory is useful when dealing with lists because it allows expanding the list as new items are added and contracting the list as items are deleted.

Question 45

Expressions taking the address of an array name are invalid because the pointer the compiler creates is ____________________ to the computer.

Question 46

The compiler automatically converts any subscript used by a programmer to an equivalent ____________________ expression.

Question 47

Like all variables, pointers can be initialized when they are ____________________.

Question 48

The addresses in pointers can be compared by using any of the C++ ____________________ operators.

Question 49

The advantage of using pointers rather than references is that the function call specifies that ____________________ are being used.

Question 50

Access to multidimensional ____________________ can be made using pointer notation.