Loading repository data…
niharika2810 / repository
A repository containing interview questions on DS, Java & Android based on my experiences.
A transparent discovery signal based on current public GitHub metadata.
This score does not audit code, security, maintainers, documentation quality, or suitability. Verify the repository and its current documentation before adoption.
A repository containing interview questions on DS, Java & Android based on my experiences.
Note: I am not writing up the answers here for now as If I provide you the answers, what will you do? :-)
Also, you will restrict yourself to those answers only. Try and learn more deeply abut the concepts. For any particular questions, You can ask anytime.
https://www.geeksforgeeks.org/find-minimum-element-in-a-sorted-and-rotated-array/
https://www.geeksforgeeks.org/largest-subarray-with-equal-number-of-0s-and-1s//
https://www.geeksforgeeks.org/find-triplets-array-whose-sum-equal-zero/
https://www.geeksforgeeks.org/level-order-traversal-in-spiral-form/
https://www.geeksforgeeks.org/construct-tree-from-given-inorder-and-preorder-traversal/
https://www.geeksforgeeks.org/write-an-efficient-c-function-to-convert-a-tree-into-its-mirror-tree/
https://www.geeksforgeeks.org/maximum-sum-such-that-no-two-elements-are-adjacent/
https://www.geeksforgeeks.org/longest-common-subarray-in-the-given-two-arrays/?ref=leftbar-rightbar
https://www.geeksforgeeks.org/maximum-sum-path-across-two-arrays/
https://www.geeksforgeeks.org/merge-two-sorted-arrays-o1-extra-space/
Selected from shared topics, language and repository description—not editorial ratings.
Kashif-E /
This repository contains a sample implementation of Material Theming in SwiftUI. It includes custom structs for typography, colors, shapes, and spacing, as well as a ThemeManager and custom ViewModifiers for easy implementation in your own projects
35/100 healthContinuation Question to 32, What is the time complexity of your solution and how can you improve it?
What is the time complexity of mergeSort, quickSort and Binary search?
What is the time complexity for removing an element from LinkedList?
Interfaces vs Abstract Classes.Why Interfaces if abstract classes are already there.
JAVA 8 new features
Hashmap implementation,ArrayList implementation
How to make a class immutable.
String pools,intern keyword,new() keyword
Linked list vs Array,Array vs ArrayList,Set vs List vs Map,Iterator vs Enumeration.
How to compare two objects in Set?(hint : equals() and hashcode() overriding)
How ClickListener implemented in Java?
Programs based on Inheritance and multithreading. (Most Important)
1.) Add(String string) 2.) Add (Object object), you called Add(null) what will be the output here?
Why main Static?
Static vs Singleton? Which to prefer when?
Can a static method be overloaded/overridden?Can a constructor be made static? Can we override/overload constructor? Which type of error you get-Compile/Runtime.
Can we have final/static/default methods in interface/abstract classes?
Check for every keyword? Which type of error-Compile time or runtime(I remember it after I tried a sample in Android studio).
Stack vs Heap allocation in Java.
Why is String immutable?
Why reflection in Java?Introspection vs Reflection?
Anonymous vs Inner Classes.Static Inner Classes. Can we have Static inner classes on Top?
What is the naming structure for an inner class in java?
Default value for Access specifiers,primitie types.
Protected vs Default. Do static retain value if an application is removed from recent.
How is the Exception class implemented in java?Try/Catch with finally block.
Any situation when finally won’t get executed?
Is Java pass by value/reference?
What will be the result if StringBuffer value compared with String — strbuf.equals(str) /str.equals(strbuf)
Synchronization in Java.
Can one interface extend/implement other/Can one abstract class extend other? Can interface extend abstract classes?
Runtime vs compile time polymorphism with real-world scenarios. How do you define encapsulation?
this vs super() keyword
Implement own Garbage collection in java.
Why runnable interface if we have already had Thread class in Java?
Why thread pool in Java?
Order of call of constructors during Inheritance.
Why should we use Kotlin for Android Development?
Kotlin operators - apply, run, let, ?
How Kotlin is null-safe?
What is the difference between var and val?
How const is different from val?
What is the difference between ?. and !!
How to define static functions in Kotlin?
What are Data Classes in Kotlin?
What do you mean by Sealed classes in Kotlin?
Collections in Kotlin.
Difference between lateinit and lazy.
What is Kotlin synthetic binding?
Difference between Kotlin Synthetics, View binding and Butterknife?
What are extension functions in Kotlin?
What are lambda expressions?
What are Higher-Order functions in Kotlin?
Difference between let, run, with, also, apply in Kotlin.
What is the best way for performing tasks on a background thread in kotlin?
What are Coroutines in Kotlin?
What are the different Coroutines Scope?
Why use suspend function in Kotlin Coroutines?
Explain Coroutine LifecycleScope.
What is Kotlin Flow?
Kotlin Flow vs RxJava.
Room vs Realm? Why not Realm?
(Also they ask for code not just theory things. Keep this in mind.)
Activity/Fragment/Broadcast/Application/Service Lifecycle (Explain with one line description)
Which lifecycle method gets called when A goes to B/come back to A? Activity Launch Modes with examples
Let’s say 4 activities are there A->B->C->D. How to launch A from D finishing in between activities?
4 Activities are there A->B->C->D.How to finish application from D if none of the activities opened earlier finished till now?
How CLEAR_TOP flag intent works in android?
Service vs IntentService?When to prefer which type of service?
Explain ways for Activity to activity communication/Activity to fragment communication/Fragment to fragment communication.
How to make a service persist even after Application killed?
How to achieve Interprocess communication in android?
How Async task internally works? Async task implementation?
Cons of using Async task? How to overcome this limitation?
Why Job Scheduler?
Notification related changes in Oreo?
How to handle Background service and execution limits with new Oreo Updates?
Have you seen Google I/O 2018? What were the updates for Android there?
Why do we use Headless fragments?
Memory Leakage, Causes, and preventions in Android? I have written a blog out here.You can refer this too
Ways to optimize an Android Application.
Proguard-Obfuscation/ Minification, Build Variants, Flavours.
How to achieve MultiThreading in Android?
Suppose you have 10 images to fetch from Server. What is the best way to fetch images? (Hint: Read about ThreadPool and Executor)
Builder vs Factory Pattern with an example
Why MVP not MVC? They will ask you to make a wireframe kind of thing on paper to demonstrate MVP pattern in android.
Why RXJAVA so popular nowadays?
Problems in RXJAVA? They can provide you with some scenarios to get to know if you can find out the problems with it.
Map vs Flat map? (Most commonly asked in RXJAVA)
Should we provide a context in presenter/Model? Answering yes/no is not enough. You have to provide a solution for it.
Why Schedulers and How Rxjava internally works with them? SusbcribeOn vs ObserveOn, Schedulers on which both of these work? .subscribe(new Subscriber…) vs .subscribe(new Observer…)
IOScheduler/new Thread Scheduler in RXJava
How dagger internally worksDagger vs Dagger2? Explain the purpose of every annotation taken in Dagger2.
How do you decide scope in Dagger? Why Qualifier annotation?
Why do we use Handlers? Do you know the Loopers? What’s the role of Message queue? With this, they will go for Main Thread working. They wil