Explain MVP implementation for Login functionality. Show the flow diagram. What is Dagger 2? Why we use Dependency Injection? How to use Dagger with above example? What is the Difference between REST and SOAP? How would you secure your application? What is SSL pinning? Where to store the certificate or PKI? If we are storing it in app then where should we store it in app? How agile method works? What is Retrospective? What are design patterns? Can we clone Singleton object? What if we don’t want to be cloned? What is getfactory design pattern? What is Builder pattern? Give me some example for Factory pattern. What are Loopers? Why do we need it? Looper works on Main thread or worker thread? What are services? Different types of services? How bind service works? What the main pillars of OOPS? What is Abstraction? What is the concept of Abstraction? Can we create object of it? What is the difference between Interface and Abstract class? What are custom components? What are the benefits of using Kotlin? What is the difference between Object oriented programing and procedural oriented programing? What is association? What is Dependency? What is difference between dependency and association? How to not allow parent class’s methods to be overriding in child class? Internal working of Hashmap? Put and get method. What is difference between Hashmap and Hashtable? What happens when Hashmap is modified during Iteration? How to avoid it? What are extension function? What is null safety? What if we want it to ignore null safety? (Ans !!) What is difference StringBuffer and StringBuilder? Difference between == and equals? What are delegation in Kotlin? How do we implement unit testing for Login use case mentioned before? What kind of annotation are required? What is sealed class? What is the difference between MVC and MVP? What is the disadvantage of using Singleton? What is DVM? How does it work? What are the different constraint of the Constraint Layout? Why it was introduced? What are the advantage of it compare to RelativeLayout? What are the reasons for app rejection on PlayStore? Do we have switch-case in Kotlin? What we can use for that?