Fundamentals

Question 1

int

Answer 1

storing integers - %i or %d

Question 2

char

Answer 2

storing characters - %c

Question 3

float

Answer 3

storing numbers with decimals - %f

Question 4

double

Answer 4

same as float but double accuracy - %e

Question 5

Counting

Answer 5

Always start with zero

Question 6

Conditionals

Answer 6

For making a decision

Question 7

==

Answer 7

equality operator check

Question 8

=

Answer 8

For assigning the first value to the second

Question 9

x++

Answer 9

Increase by 1 for loops

Question 10

While

Answer 10

Like “for” but conditional runs after block of code

Question 11

Pointer

Answer 11

Point to a location (for computer memory)

int* foo = 123

Question 12

OOP

Answer 12

Variable and Functions trade for Objects and attributes

Question 13

Objects

Answer 13

Are instance of a class

Question 14

Instant Method

Answer 14

One object in a class 
i.e. - (void) addGas;

Question 15

Class Method

Answer 15

All objects in class
i.e. All Cars

Question 16

Method syntax

Answer 16

[recipient message];
who method
Nested ex. [NSString alloc] init];
best practice never do more than 2

Question 17

Accessor Methoods

Answer 17

Get data

Question 18

Setter Methods

Answer 18

Update attributes of objects - no need to return a value

- (void) setCaption: (NSString*)input;

Question 19

Data Encapsulation

Answer 19

Data is contained by methods in classes

Question 20

Classes Contain 2 Files

Answer 20

Implementation (.m) and Interface (.h)

Question 21

Interface File (.h)

Answer 21

Defines instance variables and public methods

Question 22

Implementation File (.m)

Answer 22

Actual code for methods in interface file including private methods

Question 23

NS

Answer 23

Next Step

Question 24

NSString

Answer 24

String text that is immuatable

Question 25

NSMutableString

Answer 25

String that is mutable

Question 26

NSArray

Answer 26

Array of objects that is immutable

Question 27

NSMutableArray

Answer 27

Array of objects that is mutable

Question 28

NSNumber

Answer 28

Holds numeric value

Question 29

Inheritance

Answer 29

All classes inherit from parent class (ex. methods)

Question 30

@property (weak)

Answer 30

Attributes is used as a reference. Attribute is not owned by the object

Question 31

@property (strong)

Answer 31

Attribute is owned by the object and will be save in memory

Question 32

ARC

Answer 32

Automatic Reference Counting used to make memory counting easier

Question 33

NSArray

Answer 33

Holds a list of objects

Question 34

NSDictionary

Answer 34

Holds a list of key/value object pairs

Question 35

@

Answer 35

Common prefix for all Objective-C literals

Question 36

Literals

Answer 36

NSString, NSArray, NSDictionary, etc.

Question 37

Nil

Answer 37

Prints a null meaning no value

Value of an object pointer when it isn’t pointing to anything

Question 38

*

Answer 38

Pointer to where information can be found

Question 39

%p

Answer 39

Prints output

Question 40

id

Answer 40

Generic container to put in any type of object (string, array, etc,)

No need for * because id is a pointer by definition

Question 41

selector

Answer 41

SEL object to call during runtime - how you send in methods names as parameters

SEL firstNameSelector = @selector(firstName);

NSLog(@”[person firstName] = %a”, [person performSelector:@selector(firstName)]);

Question 42

enums

Answer 42

list of predefined values / constants

Question 43

structs

Answer 43

structure group of variables

Question 44

unsigned int

Answer 44

integers with no negatives %u

Question 45

void

Answer 45

Return nothing

Question 46

dot syntax

Answer 46

Only for “getter” & “setter” methods (accessor)

Question 47

method with input

Answer 47

method:input

Question 48

Class Method

Answer 48

+ (NSString*) caption;

Question 49

dealloc

Answer 49

Called on an object to remove it from memory

Use finalize method with garbage on

Question 50

reference counting

Answer 50

alloc an object, retain an object, you should release for each occurrence

Question 51

2 Reason to Create an Object

Answer 51

1. To keep it as an instance variable

2. To use temporarily for single use inside a function

Question 52

Memory Management inside a function

Answer 52

If you create an object with alloc or copy, send it a release or autorelease. Any other way, do nothing.

Question 53

retain

Answer 53

For @property to retain input value

Question 54

@synthesize

Answer 54

Automatically generates the setter and getters for us in Implementation file
@synthesize caption;

Question 55

self.<var></var>

Answer 55

Syntax for setter method which includes memory management

Question 56

categories

Answer 56

Allows you to add methods to an existing class without subclassing it or needing to know further details. Utilities is Category.
@interface NSString (Utilities)
- (BOOL) isURL;
@end

Question 57

new line

Answer 57

/n

Question 58

Precedence

Answer 58

Parenthesis, exponents, multiplication, division, add, subtract

Question 59

Modulus

Answer 59

The remainder %
int m = 38 % 7;
return 3

Question 60

new line

Answer 60

/n

Question 61

@class

Answer 61

used when we only want to declare the object of any class..

Question 62

@interface

Answer 62

Creates a class
@interface Fraction: NSObject {
    int numerator;
    int denominator;
}