Java interview questions part 6
Java interview questions part 6
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which method is used to create a directory with fileattributes?
Correct Answer is : Files.createDirectory(path, fileAttributes)
2. Which method can be used to check fileAccessiblity?
Correct Answer is : isReadable(path), isWritable(path), and isExecutable(path)
3. How can we delete all files in a directory?
Correct Answer is : Files.delete(path)
4. How to copy the file from one location to other?
Correct Answer is : Files.copy(source, target)
5. How can we get the size of specified file?
Correct Answer is : size(path)
6. How to read entire file in one line using java 8?
Correct Answer is : Files.readAllLines()
7. How can we create a symbolic link to file?
Correct Answer is : createSymbolicLink()
8. How can we filter lines based on content?
Correct Answer is : lines.filter()
9. Which jar provides FileUtils which contains methods for file operations?
Correct Answer is : apache commons
10. Which feature of java 7 allows to not explicitly close IO resource?
Correct Answer is : AutoCloseable
11. Which of the following is not introduced with Java 8?
Correct Answer is : Serialization
12. What is the purpose of BooleanSupplier function interface?
Correct Answer is : represents supplier of Boolean-valued results
13. What is the return type of lambda expression?
Correct Answer is : Function
14. Which is the new method introduced in java 8 to iterate over a collection?
Correct Answer is : StringList.forEach()
15. What are the two types of Streams offered by java 8?
Correct Answer is : sequential and parallel
16. Which feature of java 8 enables us to create a work stealing thread pool using all available processors at its target?
Correct Answer is : newWorkStealingPool
17. What does Files.lines(Path path) do?
Correct Answer is : It reads all the lines from a file as a Stream
18. What is Optional object used for?
Correct Answer is : Optional is used to represent null with absent value
19. What is the substitute of Rhino javascript engine in Java 8?
Correct Answer is : Nashorn
20. What does SAM stand for in the context of Functional Interface?
Correct Answer is : Single Abstract Method
