Fusioni Technologies Interview Questions and Answers

Q1. Tableview data source and delegate Closure Protocol Class and structure Arc Data pass
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Q2. Closure and its types
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Closures are self-contained blocks of functionality that can be passed around and used in your code.
• Closures capture and store references to any constants and variables from the context in which they are defined.

• There are three types of closures: Global functions, Nested functions, and Closure expressions.

• Closure expressions are unnamed closures written in a lightweight syntax that can capture values from their surroun...read more
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Q3. Protocol and delegate
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Q4. ARC and strong and weak
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ARC manages memory in iOS, using strong and weak references to prevent memory leaks and retain cycles.
• ARC (Automatic Reference Counting) automatically manages memory in Swift and Objective-C.

• Strong references increase the reference count of an object, keeping it in memory.

• Weak references do not increase the reference count, allowing the object to be deallocated.

• Example: A parent object holding a strong reference to a c...read more
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Q5. Design patternwhich followed
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I follow the MVC (Model-View-Controller) design pattern in my iOS development.
• Separates data (Model), user interface (View), and control logic (Controller)

• Improves code organization and maintainability

• Promotes reusability and scalability

• Examples: UIKit framework in iOS uses MVC pattern
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Q1. Have you worked on MVVM?
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Yes, I have worked on MVVM architecture pattern.
• MVVM stands for Model-View-ViewModel.

• It separates the UI logic from the business logic.

• ViewModel acts as a mediator between Model and View.

• Data binding is a key feature of MVVM.

• I have implemented MVVM in my previous Android projects using Android Architecture Components such as LiveData and ViewModel.
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Q2. What is Broadcast Reciever?
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Broadcast Receiver is a component of Android system that listens to system-wide broadcast announcements.
• It is used to respond to system-wide broadcast announcements.

• It is implemented as a subclass of BroadcastReceiver class.

• It can be registered either statically in AndroidManifest.xml or dynamically in code.

• Examples of system-wide broadcasts are battery low, network connectivity changes, etc.
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Q3. What is difference in Val and var?
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Val is immutable and var is mutable in Kotlin programming language.
• Val is used to declare a variable whose value cannot be changed once assigned.

• Var is used to declare a variable whose value can be changed.

• Val is similar to final variable in Java.

• Var is similar to non-final variable in Java.

• Val is preferred over var as it ensures immutability and reduces the chances of bugs.

• Example: val name = "John" // value cannot be...read more
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Q4. What is Rx Java .?
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RxJava is a library for composing asynchronous and event-based programs using observable sequences.
• RxJava is a Java implementation of ReactiveX, a library for composing asynchronous and event-based programs using observable sequences.

• It provides a set of operators to transform, filter, and combine these sequences.

• RxJava can be used for network calls, database operations, UI events, and more.

• It simplifies concurrency an...read more
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Then ask me to parse a json api in a recycler view