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Question: Can you explain the concept of protocol-oriented programming in Swift?
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Answer: In Swift protocol-oriented programming (POP) emphasizes the use of protocols to define common behavior
and functionality, allowing types to conform to multiple protocols and leverage protocol extensions for default implementations.
POP promotes composition over inheritance and enables more flexible and modular code designs.
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Question: What are property observers in Swift?
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Answer: The property observers in Swift allow you to observe and respond to changes in property values.
There are two types:
• willSet, which is called just before the value is set.
• didSet, which is called immediately after the new value is set.
Property observers are particularly useful for executing code before or after a property's value changes.
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Question: What is the difference between a closure and a function in Swift?
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Answer: In Swift, a closure is a self-contained block of functionality that can be passed around and used
in your code, similar to a function.
The main difference is that closures can capture and store references to any constants and variables from the context in which
they are defined, whereas functions cannot.
Closures are often used for short, one-off pieces of functionality or when you need to pass behavior as an argument.
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Question: What is the purpose of using the 'defer' statement in Swift?
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Answer: The 'defer' statement in Swift is used to defer the execution of a block of code until the current
scope exits, regardless of how the scope is exited (e.g., through return, break, or an error).
It's often used to ensure that cleanup or finalization tasks are performed before leaving a scope,
such as closing files or releasing resources.
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Question: Can you explain how error handling is done in Swift?
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Answer: In Swift Error handling is done using a combination of do-catch statements for catching and handling errors,
and the throw keyword for propagating errors.
Functions that can potentially throw errors are marked with the 'throws' keyword,
and errors are thrown using the 'throw' keyword. Errors are caught and handled using do-catch blocks.
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Question: Can you explain the difference between a protocol and a delegate in Swift?
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Answer: A protocol in Swift is a blueprint of methods, properties, and other requirements that a conforming type must implement.
It defines a set of rules or behaviors that a type must adhere to.
A delegate, on the other hand, is an object that acts on behalf of another object.
Delegation is a design pattern commonly used in Swift where one object delegates tasks or
responsibilities to another object by conforming to a protocol.
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Question: What is a typealias in Swift?
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Answer: A typealias in Swift is used to provide a new name for an existing type.
It does not create a new type; rather, it creates an alias (or alternative name) for an existing type,
making the code more readable and expressive.
Typealiases are commonly used to simplify complex type declarations,
improve code clarity, or provide more meaningful names for types.
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