Java interview questions part 1
Java interview questions part 1
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Graphics class is available in _________package.
Correct Answer is : java.awt
2. Which of the following statements is true?
Correct Answer is : all constructor are method
3. Container is the __________ for component class.
Correct Answer is : base class
4. uppercase() and lowercase() methods are accessed by using ______ method .
Correct Answer is : class
5. The methods and data of class Character are defined in the ____________ file
Correct Answer is : UnicodeData
6. Autocloseable was introduced in which Java version?
Correct Answer is : java SE 7
7. What is the alternative of using finally to close resource?
Correct Answer is : autocloseable interface to be implemented
8. Which of the below is a child interface of Autocloseable?
Correct Answer is : Closeable
9. It is a good practise to not throw which exception in close() method of autocloseable?
Correct Answer is : InterruptedException
10. What is the output of below snippet?
Correct Answer is : Runs successfully
11. What is the difference between AutoCloseable and Closeable?
Correct Answer is : Closeable throws IOException; AutoCloseable throws Exception
12. What is the use of Flushable interface?
Correct Answer is : Flushes this stream by writing any buffered output to the underlying stream
13. Which version of java added Flushable interface?
Correct Answer is : java SE 5
14. Does close() implicitly flush() the stream.
Correct Answer is : TRUE
15. AutoCloseable and Flushable are part of which package?
Correct Answer is : Autocloseable java.lang; Flushable java.io
16. What are the components of a marker interface?
Correct Answer is : No fields, No methods
17. Which of the following is not a marker interface?
Correct Answer is : Reader
18. What is not the advantage of Reflection?
Correct Answer is : Examine a class’s field at compile time
19. How private method can be called using reflection?
Correct Answer is : getDeclaredMethods
20. How private field can be called using reflection?
Correct Answer is : getDeclaredFields
