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| Interview Questions and Answers for 'Samsung' - 10 question(s) found - Order By Rating | ||||
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| This question was recently asked at 'Samsung India'.This question is still unanswered. Can you please provide an answer. | ||||
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| Ans. Assigning a value of one type to a variable of another type is known as Type Casting. Example : int x = 10; byte y = (byte)x; In Java, type casting is classified into two types, Widening Casting(Implicit) widening-type-conversion and Narrowing Casting (Explicitly done) narrowing-type-conversion. Widening or Automatic type converion - Automatic Type casting take place when,the two types are compatible and the target type is larger than the source type Example : public class Test { public static void main(String[] args) { int i = 100; long l = i; //no explicit type casting required float f = l;//no explicit type casting required System.out.println("Int value " i); System.out.println("Long value " l); System.out.println("Float value " f); } } Narrowing or Explicit type conversion - When you are assigning a larger type value to a variable of smaller type, then you need to perform explicit type casting. Example : public class Test{ public static void main(String[] args) { double d = 100.04; long l = (long)d; //explicit type casting required int i = (int)l;//explicit type casting required System.out.println("Double value " d); System.out.println("Long value " l); System.out.println("Int value " i); } } | ||||
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| Discuss Correct / Improve typecasting type casting Asked in 23 Companies | ||||
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| Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features 1. Inheritance for Code Reuse 2. Abstraction for modularity, maintenance and agility 3. Encapsulation for security and protection 4. Polymorphism for flexibility and interfacing | ||||
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Discuss Correct / Improve oops oops features Asked in 260 Companies  basic  frequent | ||||
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| Ans. https://en.wikipedia.org/wiki/Database_normalization | ||||
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| Discuss Correct / Improve normalization database Asked in 35 Companies intermediate frequent | ||||
 Frequently asked question for intermediate developers. Frequently asked in HCL Technologies and EPAM. | ||||
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| Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached. | ||||
 Sample Code for volatile | ||||
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| Discuss Correct / Improve java oops synchronization volatile java keywords Asked in 42 Companies intermediate frequent | ||||
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| Ans. It in Java is used to indicate that a field should not be serialized. | ||||
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| Discuss Correct / Improve java oops serialization transient java keywords Asked in 39 Companies intermediate frequent | ||||
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| Usually asked only to fresh graduates and less experienced developers. | ||||
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| Ans. These are threads that normally run at a low priority and provide a basic service to a program or programs when activity on a machine is reduced. garbage collector thread is daemon thread. | ||||
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| Discuss Correct / Improve java threads multi threading operating system daemon thread garbage collection Asked in 10 Companies intermediate frequent | ||||
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| Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback) | ||||
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| Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html | ||||
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| Discuss Correct / Improve java design pattern singleton at&t ebay fidelity india united healthcare india Asked in 46 Companies intermediate frequent | ||||
The use of volatile keyword facilitates ..
