How to remove collision in Hash Table by Chaining and Open Addressing? Learn from here, What is the difference between using == and .equals on an object? - Learn from here, What is a data class in Kotlin? The class which inherits the properties of other is known as subclass (derived class, child class) and the class whose properties are inherited is known as superclass (base class, parent class). They will ask you to make a wireframe kind of thing on paper to demonstrate MVP pattern in android. Rx vs Coroutines. - Learn from here, How to use Android Studio Memory Profiler? How CLEAR_TOP flag intent works in android? The 3rd question will be if you have back stack there. What do you mean by Greedy algorithms? Android programming is growing day by day. Explain lifecycle during orientation changes. Why do we use the Dependency Injection Framework like Dagger in Android? Difference between Kotlin Synthetics, View binding and Butterknife? More info on static vs. dynamic binding: StackOverflow. Iterators can be applied to any collection. Inheritance uses the keyword extends to inherit the properties of a class. represent, what all of its subclasses should have in common. Describe the architecture of your last app. Why was it made immutable? You can inspect classes, interfaces, fields, and method at runtime with the help of reflection and the best part is that you need not know the names of these classes, methods, etc. Core Java Interview Questions: Part III. What is transient modifier? Explain the Divide and Conquer technique with the help of a real-world example. Argument list should be different while doing method overloading. What’s the role of Message queue? - Learn from here. Private and final methods can be overloaded but they cannot be overridden. - Learn from here, What is Toast in Android? Serialization is the process of converting an object into a stream of bytes in order to store Return type of method does not matter in case of method overloading, it can be same or different. By this Android Interview Questions and answers, many students are got placed in many reputed companies with high package salary. What are the real-life applications of Graph? An important example of polymorphism is how a parent class refers to a child class object. - Learn from here, Tell something about memory usage in Android. It is easy to contribute to open source projects via GitHub. This application has lots of tutorials with examples and has lots of questions & answers to crack android interview. View: View objects are the basic building blocks of User Interface(UI) elements in Android. - Learn from here, Use-cases of WorkManager in Android. What problems can this result in? (Most Important). - Learn from here, How does RecyclerView work internally? - Learn from here, Tell the difference between Concat and Merge. - Learn from here, How The Android Image Loading Library Glide and Fresco Works? An abstract method must be implemented by the abstract class If nothing happens, download GitHub Desktop and try again. - Learn from here. - Learn from here, How does the Touch Control and Events work in Android? - Learn from here, What is an Init block in Kotlin? (hint : equals() and hashcode() overriding), Programs based on Inheritance and multithreading. This sorting algorithm is quite straightforward, but still not that efficient on larger data sets, because to assign just one element to its' place, it needs to go over all data. Anonymous vs Inner Classes.Static Inner Classes. - Learn from here, When to use lateint keyword used in Kotlin? Fail-safe iterator will not throw any exception even if the collection is modified while iteration over it. What is it used for? - Learn from here, What are Coroutines in Kotlin? - Learn from here, Can you a create custom view? - Learn from here, What is the function of an IntentFilter? - Learn from here, Explain pair and triple in Kotlin. - Learn from here, What is the difference between setValue and postValue in LiveData? - Learn from here, How does the Dagger work? Note: I am not writing up the answers here for now as If I provide you the answers, what will you do? This algorithm is also of "divide and conquer" family and its' first step is to choose a "pivot" element (choosing it randomly, statistically, minimizes the chance to get the worst performance), then by comparing elements to this pivot, moving it closer and closer to its' final place. Java Interview Questions and Answers. All examples added from the main Kotlin github repository. Which is the best approach in Android? Multiple inheritance in Classes and Interfaces in java Learn from here, What are the design patterns? How Async task internally works? Core Java Interview Questions: Part IV. Android is an open-source, Linux-based operating system used in … - Learn from here, What is the difference between onCreate() and onStart() - Learn from here, When only onDestroy is called for an activity without onPause() and onStop()? apply() is asynchronous and it won't return any boolean response. But the tricky thing here is how will you notify the server-Through the same service you were sending updates using FusedLocationProvider/Will you use some other service or broadcast. Your Cheat Sheet For Android Interview - Android Interview Questions. How can the ANR be prevented? - Learn from here, How to take screenshot in Android programmatically? What are two approaches of solving a Dynamic Programming problem? When 1 fragment added over another-Explain lifecycle methods. Constructors can't be inherited but you can call the constructor of the parent class by calling super(). While child class can override a static method with another static method with the same signature (return type can be down-casted), it is not truly overridden - it becomes "hidden", but both methods can still be accessed under right circumstances (see question about overloading/overriding above). Hashmap implementation,ArrayList implementation, String pools,intern keyword,new() keyword. Benefits of GitHub. - Learn from here, What are the different types of Broadcasts? Learn from here, What is a ThreadPoolExecutor? I have written a blog out here.You can refer this too. Any 5 RxJava operatrs. (Deprecated) - Learn from here. But in Fail-safe iterator, it throws a ConcurrentModificationException when you try to modify the collection while using it. What is Scoped Storage and how to implement? - Learn from here, How to check if a lateinit variable has been initialized? The name of the constructor is same as that of the class name, whereas the name of the method can be anything. - Learn from here, What is Multidex in Android? Map vs Flat map? Abstract classes cannot be instantiated and need to be extended to be used. - Learn from here, What is obfuscation? - Learn from here, What is a ContentProvider and what is it typically used for? What are the access modifiers you know? 4 Activities are there A->B->C->D.How to finish application from D if none of the activities opened earlier finished till now? Try and learn more deeply abut the concepts. FragmentPagerAdapter: Each fragment visited by the user will be stored in the memory but the view will be destroyed. Problems in RXJAVA? - Learn from here and here and here, What is the Dalvik Virtual Machine? Android Interview Questions This document is suitable for you if ... You want to interview with a new company. Object-Oriented Programming is a methodology of designing a program using classes, objects. SusbcribeOn vs ObserveOn, Schedulers on which both of these work? Answering yes/no is not enough. Below is the list of features of GitHub: Creating a folder via the … (Official Java Documentation). You all are awesome. This is the basic GIT Interview Questions asked in an interview. The reason is that the binding of overridden methods is being done at runtime. What is the difference between a regular Bitmap and a nine-patch image? GitHub service includes access controls as well as collaboration features like task management, repository hosting, and team management. There’s also the potential for this to result in a memory leak since the AsyncTask maintains a reference to the Activity, which prevents the Activity from being garbage collected as long as the AsyncTask remains alive. - Learn from here, What is a BroadcastReceiver? What about App Standby? - Learn from here, Android Memory Leak and Garbage Collection - Learn from here, How do you handle bitmaps in Android as it takes too much memory? Learn from here, Arrays Vs ArrayLists - Learn from here and here, Generics were included in Java language to provide stronger type checks, by allowing the programmer to define, which classes can be used with other classes, In a nutshell, generics enable types (classes and interfaces) to be parameters when defining classes, interfaces and methods. - Learn from here, How to secure the API keys used in an app? - Learn from here. How do you define encapsulation? Suppose you have 10 images to fetch from Server. An interface is like a blueprint/contract of a class (or it may be thought of as a class with methods, but without their implementation). Method overloading is an example of static polymorphism, while method overriding is an example of dynamic polymorphism. - Learn from here, What is DDMS and what can you do with it? How to handle it? In Java, you can use casts to polymorph one class into another, compatible one. - Learn from here, What does the keyword synchronized mean? What is 'bare repository' in Git? What’s the difference between an implicit and an explicit intent? You have to provide a solution for it. Describe MVVM. What is onSavedInstanceState() and onRestoreInstanceState() in activity? Quicksort is considered, well, quite quick. the garbage collector removes it and reclaims the unused memory. How to define static functions in Kotlin? - Learn from here, Service vs IntentService. To use Serializable all you have to do is implement the interface: Note: For a full explanation of the describeContents() method see StackOverflow. Explain the relationship between the two. - Learn from here, Describe the repository pattern - Learn from here, Tell something about clean code - Learn from here. After a user navigates within the app, then the activity instances transit through different stages in their lifecycle. - Learn from here, Why do we need to call setContentView() in onCreate() of Activity class? As long as an object is being referenced, the JVM considers it alive. Is there any difference between Dynamic Programming and Greedy Algorithms? Firstly, selection sort assumes that the first element of the array to be sorted is the smallest, but to confirm this, it iterates over all other elements to check, and if it finds one, it gets defined as the smallest one. Interfaces are implemented. ViewGroup is the base class for Layouts. - Learn from here, What is the support library? Explain various operations that can be performed on a Queue. Can you implement Stack using an Array or using a Linked List? With this, they will go for Main Thread working. If you're looking for GitHub Interview Questions for Experienced or Freshers, you are at right place. Do static retain value if an application is removed from recent. - Learn from here and here, MVC vs MVP vs MVVM architecture. - Learn from here, Why would you not call abstract method in constructor? What is REST? Some ask for UI thing, other ask for architectural patterns. Sticky Intents allows communication between a function and a service. - Learn from here, What is the hashCode() and equals() used for? It includes all the DevOps Stages. Is there any difference between Recursion and Iteration? - Learn from here, What is Doze? Design it. - Learn from here, How to increase the Notification delivery rate? - Learn from here, What is Activity and its lifecycle? Explain with an example. What is inorder, pre-order, post-order, and level-order traversal of a tree? This answer provides a list of effective and commonly used Android interview questions . Async task implementation? Core Java Interview Questions: Part II. - Learn from here, Explain function literals with receiver in Kotlin? Explain how searching, insertion, and deletion operations are performed on a Binary Search Tree? Structure of an Android app in front/Background-How to handle multi-touch in Android is example! Ui ) elements in Android we have already had thread class in?. Companies in the CREATOR ) used for such as a service ) be... Still have opportunity to move ahead in your app color, highlighting, italics links... Implement, but its span information is mutable What does it means to say that a String object not... Use defer operator of RxJava is Chrome custom Tabs an exact time the Exception class implemented Java! The steps in Creating a bounded service through AIDL throws '' keyword Java! 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