Java 9 - Online Quiz

Q 1 - Which of the following is correct about Module System in Java 9?

A - A new optional phase,link time, is introduced.

B - Link time phase is in-between compile time and run time.

C - During Link time phase, a set of modules can be assembled and optimized, making a custom runtime image using jlink tool.

D - All of the above.

Q 2 - Which of the following is correct w.r.t Multirelease jar?

A - This jar format is introduced in Java 9.

B - The jar format has been enhanced to have different versions of java class or resources can be maintained and used as per the platform.

C - Both of the above.

D - None of the above.

Q 3 - Which of the following method is correct about Map in Java 9?

A - For Map interfaces, of(...) method is overloaded to have 0 to 10 parameters.

B - For Map interfaces, ofEntries(...) method is having var arg as parameter.

C - Both of the above.

D - None of the above.

Q 4 - Which of the following is a not valid member of interface till Java 8?

A - Private method

B - Default method

C - Static method.

D - All of the above.

Q 5 - Which of the following is a correct statement about ofNullable() method of Stream class in Java 9?

A - ofNullable method is introduced to prevent NullPointerExceptions and to avoid null checks for streams.

B - This method returns a sequential Stream containing single element, if non-null, otherwise returns an empty Stream.

C - Both of the above

D - None of the above

Q 6 - Which of the following is a correct statement about try-with-resources statement?

A - The try-with-resources statement is a try statement with one or more resources duly declared.

B - Any object implementing java.lang.AutoCloseable or java.io.Closeable, interface can be used as a resource.

C - The try-with-resources statement ensures that each resource is closed after the requiredment finishes.

D - All of the above

Q 7 - Which of the following is a correct statement about @Deprecated Annoation?

A - forRemoval indicates whether the annotated element is subject to removal in a future version.

B - Default value of forRemoval is false.

C - Both of the above.

D - None of the above

Q 8 - In which of the following version of java MultiResolutionImage Interface was introduced?

A - Java 7

B - Java 8

C - Java 9

D - None of the above

Q 9 - Which of the following correctly describes the getResolutionVariants() method of MultiresolutionImage Interface?

A - Gets a specific image which is best variant to represent this logical image at the indicated size.

B - Gets a readable list of all resolution variants.

C - Both of the above

D - None of the above

Q 10 - Which of the following correctly describes the orTimeout() method of CompletableFuture Interface?

A - This method completes this CompletableFuture with the given value if not otherwise completed before the given timeout.

B - This method exceptionally completes this CompletableFuture with a TimeoutException if not otherwise completed before the given timeout.

C - Returns a new incomplete CompletableFuture of the type to be returned by a CompletionStage method.

D - None of the above