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| Core java - Interview Questions and Answers for 'Samsung india' - 3 question(s) found - Order By Newest | ||||
 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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 How does volatile affect code optimization by compiler? | ||||
| how is the internal code for the "volatile" implemented ? | ||||
| What are the different ways to avoid multi Threading related problems in Java ? | ||||
| Can we make array volatile in Java ? | ||||
| Have you heard of volatile Table in Teradata ? | ||||
| what is volatile and atomic | ||||
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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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| Which of the following combination of keywords is illegal in Java ? a. static and transient b. transient and final c. static and synchronized d. abstract and final | ||||
| Which keyword is used to provide explicit access of a code block to single thread ? a. Transient b. Final c. Explicit d. Synchronized | ||||
| Can we declare static variables as transient ? | ||||
| What are transient variables in java? | ||||
| Which of the following is true ? | ||||
| Variables of an interface are intrinsically ... a. transient b. final c. public d. static | ||||
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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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