Pointers

Question 1

What happens when we declare a variable in C?

Answer 1

Variable will be assigned to a certain memory address

Question 2

An addressable memory cell can store up to _ byte/s

Answer 2

one

Question 3

A variable will be assigned only to a _____________

Answer 3

free memory cell

Question 4

A value that we get when we access a variable that is not initialized

Answer 4

garbage value

Question 5

Contains the address of another variable

Answer 5

Pointers

Question 6

Pointer Syntax

Answer 6

<dataType> *<ptrName>
</ptrName></dataType>

Question 7

Returns the address of the variable

Answer 7

Address Operator (&)

Question 8

AKA dereferencing
Refers to the memory cell whose address is specified by the pointer variable

Answer 8

Indirection Operator (*)

Question 9

Pointer variable that points to another pointer

Answer 9

Pointer to a pointer

Question 10

Pointer to a pointer syntax

Answer 10

<dataType> **<ptrName>
</ptrName></dataType>

Question 11

____________ define what value a pointer to a pointer can hold

Answer 11

num of asterisks

Question 12

Usually, the most number of asterisks used is only ___

Answer 12

two

Question 13

A pointer P, can hold the address of a variable Q if:

Answer 13

1. P and Q have the same data type
2. Q has one less asterisk than P

Question 14

Maximum number of indirection operators (*) that can be used in the pointer is ________

Answer 14

same # as its declared #

Question 15

Referencing an uninitialized pointer may result to a __________

Answer 15

segmentation fault error

Question 16

A pointer that points to “nothing” can be initialized the _____ value

Answer 16

NULL

Question 17

Advantages of using pointers (4)

Answer 17

1. Allows you to modify other variables
2. Referencing array elements
3. Support of dynamic allocation
4. Support of dynamic structures