Top interview questions for iOS developer for Objective-C and Swift Page 1

Hi, This is Shubham Mishra a ROR, iOS, Python developer. In this blog we will see top iOS interview questions. In the dynamic world we should be updated so as to compete with others hence I have listed below top interview questions based on my and others interview experience. 

Let's Begin....

iOS Interview - Shubham Mishra
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Q: Describe the @synthesize in Objective-C?
A: This create getter and setter methods for your property.


Q: What's the distinction in between duties Synchronous & Asynchronous?
A: Synchronous: needs to wait till the task has been completed. Asynchronous: finishes a task in the background and can inform you once finished.


Q: Describe the compilation conditions?
A: Compilation Conditions to be used if DEBUG ... endif structure to also include or remove separate targets, provided block of code.


Q: Describe the @dynamic in Objective-C?
A: People are using dynamic for the NSManagedObject's subclasses. @dynamic informs the compiler that the getter and setters are developed somewhere else.


Q: What makes up the object NSError?
A: NSErrror object has three sections of a scope, an error code, a domain and a dictionary for user data. The domain is a string which describes the categories of errors from which this error comes.


Q: What to do to establish Live Rendering?
A: The @IBDesignable attribute allows App Creator to perform live updates at a given view. IBDesignable includes the interpretation of Init frame in UIView class as well.


Q: Describe the Enum or enumeration?
A: Enum is a type which basically contains a group of related values in the same umbrella but will not allow us to construct an instance without case-less enum. In the simple word it is basically a way to access a property in an easy way. 

According to Apple Enum is : "Managing state is an important part of developing your app, the bits of data that keep track of how the app is being used at the moment. Because enumerations describe a finite number of states, and can bundle associated values with each state, you can use them to model the state of your app and its internal processes."



Q: Describe the boundary box?
A: The bounding box is a concept being used geometry; it refers to a specific dimension (area or volume) in which there is a certain set of points exists.


Q: Why not use strong in Objective-C for enum property?
A: Since enums is not objects, we don't define either strong or weak here.


Q: Describe the usage of synchronized?
A: Synchronized promises that at a certain particular time, just one thread can execute the code in the chain.


Q: Describe the difference strong, weak, read only and copy?
A: Strong, weak, assign proprietary attributes define how memory will be handled with this property.

Strong is signify that the reference count should be increased and the reference to it must be managed by the life of the object

Weak (non-strong link), implies we point to an object but do not increase its reference number. It is mostly used when establishing a child relationship with a parent. The parent is clearly referring to the child but the child has only a limited relation to the parent.

Read-only, they may originally set the property but then it can not be modified.

Copy implies when this is generated we copy the object 's value. Impedes the change in its interest as well.


Ok great, we are done with this post,  

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Future of computer science technology discussed : A blog where me discussed about the future of computer science and new technologies which will change our way for looking to solve problems.

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