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IT0093 FINALS

IT0093

QuestionAnswer
In March 6, 2008, with the release of the iPhone software development kit (iPhone SDK), Apple named it iPhone OS TRUE FALSE TRUE
Apple made touch the primary interaction model removing all physical buttons TRUE FALSE TRUE
When did Apple introduced the App Store to iOS October 2008 November 2008 June 2008 July 2008 JULY 2008
iPhone 3GS was released in 2007 FALSE
When was iPhone 3GS was released? 2009
An analysis tool to assist you both optimize your apps and monitor for memory leaks in real time Instruments
iOS version where S iPhone was introduced iOS 5.0
The iOS version when iPad was unveiled iOS 3.2
Used to jump to a selected files, you can quickly select what information to view in the Assistant editor Jump bar
Swift makes programming easier, flexible, and more fun TRUE
Xcode provides a playground for testing some swift syntax TRUE
Swift is a type-safe language TRUE FALSE TRUE
It enables a compiler to deduce the type of a particular expression automatically when it compiles your code, simply by examining the values you provide type interface
Defines an alternative name for an existing type type aliases
Used to find out whether an optional contains a value, and if so, to make that value available as a temporary constant or variable optional binding
Which of the following is a correct statement let a = 1_0_1_0 let a = 1-1-1-1 let a:UInt = -10 let a:Int = Int("10") let a = 1_0_1_0
Used to group multiple values into a single compound value tuples
write the exact output given the statements below var x:String? = "Swift" print(x!) Swift
You use optionals in situations where a value may be absent TRUE FALSE TRUE
Swift 1, 2, 3 and 4 provides same syntax TRUE FALSE FALSE
In Swift constants and characters can contain unicode characters TRUE FALSE TRUE
It is the minimum value of UInt8 0
Which of the following has the correct syntax var x:Int = 10 Correct! var x = Int("10") Correct! var x:Int? = nil var x:Int = Int("123") let x:Int = Int("123") var x:Int = 10 Correct! var x = Int("10") Correct! var x:Int? = nil
Swift was based on ____________. C and Objective C
Which of the following produced an error let a = 0o88 let a = 0xff let a = 0b1010 let a = 1234 let a = 0o88
A double represent a _____ bit floating-point number 64
The latest iOS version 14
iOS 3.0 supports cut, copy, and paste TRUE FALSE TRUE
First OS name for iPhone iPhone OS
In iOS 1.0, Apple's marketing literature states that iPhone runs a version of Apple's desktop operating system, OS X TRUE FALSE TRUE
In iOS 4.0, Music apps are now able to play in background TRUE
The device that was released where iOS named was officially used iPhone 4
The programming languages that are used to develop an iOS application. Swift Objective-C
It splits the Xcode editor in two, with your primary work document on the left Assistant Editor
An Integrated Development Environment that enables you to manage, edit, and debug you iOS projects XCode
The iOS version when iPad was unveiled. iOS 3.2
Closures can capture and store references to any constants and variables from the context in which they are defined. True False TRUE
It doesn't take any arguments, and when it's called, it returns the value of the expression that's wrapped inside of it AutoClosure
The closure expression examples below illustrate these optimizations by refining a single example of the __________________. method over several iterations, each of which expresses the same functionality in a more succinct way sorted(by:)
Closures are self-contained blocks of functionality that can be passed around and used in your code. True
Nexted functions are closures that have a name and do not capture any values. True
Is a constant or variable that is stored as part of an instance of a particular class or structure Stored Property
A ___________ is a type whose value is copied when it is assigned to a variable or constant, or when it is passed to a function. value type
is/are general-purpose, flexible constructs that become the building blocks of your program's code Structure Classes
Closure expressions are unnamed closures written in a lightweight syntax that can capture values from their surrounding context. True False True
Nested functions are closures that have a name and can capture values from their enclosing function. True
are closures that have a name and do not capture any values. Global functions
can capture and store references to any constants and variables from the context in which they are defined Closure
are not copied when they are assigned to a variable or constant, or when they are passed to a function. Reference types
provide several syntax optimizations for writing closures in a shortened form without loss of clarity or intent Closure expressions
Global functions are closures that have a name and do not capture any values. True
In Swift, you define a class or a structure in a single file, and the external interface to that class or structure is automatically made available for other code to use True
Structures and Enumerations Are Value Types True
Classes and enumeration are general-purpose, flexible constructs that become the building blocks of your program's code False
are self-contained blocks of functionality that can be passed around and used in your code. Closure
Global functions are closures that have a name and can capture values from their enclosing function. True False False
are closures that have a name and can capture values from their enclosing function. Nested Function
are a convenient means of naming and defining self-contained blocks of code as part of a larger function Nested Function
Closures are self-contained blocks of functionality that cannot be passed around and used in your code. False
Is a constant or variable that is stored as part of an instance of a particular class or structure Stored property
are unnamed closures written in a lightweight syntax that can capture values from their surrounding context. Closure expressions
Unlike other programming languages, Swift does not require you to create separate interface and implementation files for custom classes and structures. True False TRUE
Closure expressions are a way to write inline closures in a complex, unstructured syntax. True False False
Closures can capture and store references to any constants and variables from the context in which they are defined. True False True
In Escaping Closures, if you want to capture ________, write ________ explicitly when you use it, or include ________ in the closure's capture. self
Swift's String and Character types provide a fast, ASCII-compliant way to work with text in your code false
Nested functions, as introduced inNested Functions, are a convenient means of naming and defining self-contained blocks of code as part of a larger function. True
associate values with a particular class, structure, or enumeration. Properties
Initializers are called to create a new instance of a particular type. In its simplest form, an initializer is like an instance method with no parameters, written using the init keyword: true
Subclassing is the act of basing a new class on an existing class. true
You can provide ________________ as part of an initializer's definition, to define the types and names of values that customize the initialization process. Initialization parameters have the same capabilities and syntax as function and method parameters initialization parameters
Any attempt to override a final method, property, or subscript in a subclass is reported as a _______ error. Methods, properties, or subscripts that you add to a class in an extension can also be marked as final within the extension's definition. compile time
Initialization - preparing an instance of a class, structure, enumeration for use. Involves setting initial value for each stored property on that instance and performing initialization that's required before the new instance is ready for use True
process of preparing an instance of class, structure, or enumeration for use. Involves setting initial value for each stored property on that instance & performing any other setup initialization that is required before the new instance is ready for use. Initialization
When you provide a method, property, or subscript override for a subclass, it's sometimes useful to use the existing superclass implementation as part of your override. True False true
Instantiation is the process of preparing an instance of a class, structure, or enumeration for use. This process involves setting an initial value for each stored property on that instance and performing any other setup or initialization that is required True
Initializers are called to create a new instance of a particular type. In its simplest form, an initializer is like an instance method with no parameters, written using the _____ keyword init
A subclass can provide its own custom implementation of an instance method, type method, instance property, type property, or subscript that it would otherwise inherit from a superclass. This is known as overloading. True False False
___________ is the act of basing a new class on an existing class. The subclass inherits characteristics from the existing class, which you can then refine. You can also add new characteristics to the subclass. subclassing
You can provide ______________ as part of an initializer's definition, to define the types and names of values that customize the initialization process. Initialization parameters have the same capabilities and syntax as function and method parameters initialization parameters
You implement this initialization process by defining _____, which like special methods that can be called to create new instance of particular type. Swift initializers don't return value. Their primary role is ensure new instances of type are correctly i initializers
Properties of optional type are automatically initialized with a value of _________, indicating that the property is deliberately intended to have "no value yet" during initialization. nil
You can prevent a method, property, or subscript from being overridden by marking it as final. True False true
The subclass inherits characteristics from the existing class, which you can then refine. You can also add new characteristics to the subclass. True False true
A subclass can provide its own custom implementation of an instance method, type method, instance property, type property, or subscript that it would otherwise inherit from a superclass. This is known as overriding. True False True
When one class inherits from another, the inheriting class is known as a ___________. Subclass
is the act of basing a new class on an existing class. The subclass inherits characteristics from the existing class, which you can then refine. You can also add new characteristics to the subclass. Subclassing
Any class that does not inherit from another class is known as a/an ____________. base class
Properties of optional type are automatically initialized with a value of _________, indicating that the property is deliberately intended to have "no value yet" during initialization. nil
When one class inherits from another, the inheriting class is known as a subclass, and the class it inherits from is known as its superclass. true
Initializers are called to create a new instance of a particular type. In its simplest form, an initializer is like an instance method with no parameters, written using the init keyword: true
Properties of optional type are automatically initialized with a value of nil, indicating that the property is deliberately intended to have “no value yet” during initialization. true
You access the superclass version of a method, property, or subscript by using the super prefix super.someMethod() //overridden method super.someProperty //overridden property super[someIndex] //overridden subscript true
You can mark an entire class as ___________ by writing the final modifier before the class keyword in its class definition (final class). Any attempt to subclass a final class is reported as a compile-time error. final
Any class that does not inherit from another class is known as a base class. True
You can set the initial value of stored property from within an initializer Alternatively, specify default property value as part of the property’s declaration. Specify default property value by assigning an initial value to the property when defined. True
Closures can never capture and store references to any constants and variables from the context in which they are defined. False
Swift strings are represented by the String type. True
Closure expressions are named closures written in a complex syntax that can capture values from their surrounding context. True
Created by: user-1838864
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