Q 1 - Which of the following functional interface represents an operation on a single operand that produces a result of the same type as its operand?

A - ToLongBiFunction<T,U>

B - ToLongFunction<T>

C - UnaryOperator<T>

D - ToIntFunction<T>

Q 2 - Which of the following is correct about default methods?

A - With java 8, an interface can have default implementation of a function in interfaces.

B - An interface can also have static helper methods from Java 8 onwards.

C - Both of the above.

D - None of the above.

Q 3 - How will you call a default method of an interface in a class?

A - Using super keyword along with interface name.

B - Using name of the interface.

C - Both of the above.

D - None of the above.

Q 4 - How will you call a static method of an interface in a class?

A - Using super keyword along with interface name.

B - Using name of the interface.

C - Both of the above.

D - None of the above.

Q 5 - Which of the following is correct about streams in java8?

A - Stream represents a sequence of objects from a source, which supports aggregate operations.

B - Most of the stream operations return stream itself so that their result can be pipelined.

C - Both of the above.

D - None of the above.

Q 6 - Which of the following is correct about streams in java8?

A - Intermediate operation's function is to take input, process them, and return output to the target.

B - collect() method is a terminal operation which is normally present at the end of the pipelining operation to mark the end of the stream.

C - Both of the above.

D - None of the above.

Q 7 - What is the purpose of forEach method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Reduce the size of the stream

Q 8 - What is the purpose of map method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Reduce the size of the stream

Q 9 - What is the purpose of filter method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Reduce the size of the stream

Q 10 - What is the purpose of limit method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Reduce the size of the stream

Q 11 - What is the purpose of sorted method of stream in java 8?

A - Iterate each element of the stream.

B - Map each element to its corresponding result.

C - Eliminate elements based on a criteria

D - Used to sort the stream

Q 12 - Which of the following is correct about collectors in java8?

A - Collectors are used to combine the result of processing on the elements of a stream.

B - Collectors can be used to return a list or a string.

C - Both of the above.

D - None of the above.

Q 13 - Which of the following is correct about Optional in java8?

A - Optional is a container object which is used to contain not-null objects.

B - Optional object is used to represent null with absent value.

C - Both of the above.

D - None of the above.

Q 14 - Which of the following is correct about Optional in java8?

A - This class has various utility methods to facilitate code to handle values as 'available' or 'not available' instead of checking null values.

B - It is introduced in Java 8 and is similar to what Optional is in Guava.

C - Both of the above.

D - None of the above.

Q 15 - Which of the following is correct about Nashorn in java8?

A - With Java 8, Nashorn, a much improved javascript engine is introduced, to replace the existing Rhino.

B - Nashorn provides 2 to 10 times better performance, as it directly compiles the code in memory and passes the bytecode to JVM.

C - Nashorn uses invokedynamics feature, introduced in Java 7 to improve performance

D - All of the above.

Q 16 - Can you execute javascript code from java 8 code base?

A - true

B - false

Q 17 - Which of the following API represents a simplified date-time API with no complexity of timezone handling in java8?

A - Local

B - Zoned

C - Both of the above.

D - None of the above.

Q 18 - Which of the following API represents a specialized date-time API to deal with various timezones in java8?

A - Local

B - Zoned

C - Both of the above.

D - None of the above.

Q 19 - Which of the following class implements a decoder for decoding byte data using the Base64 encoding scheme in Java8?

A - Base64.Decoder

B - Base64.Encoder

C - Base64Decoder

D - Base64Encoder

Q 20 - Which of the following class implements an encoder for encoding byte data using the Base64 encoding scheme in Java8?

A - Base64.Decoder

B - Base64.Encoder

C - Base64Decoder

D - Base64Encoder

Q 21 - Which of the following method of Base64 class returns a Base64.Decoder that decodes using the Basic type base64 encoding scheme?

A - getDecoder()

B - getEncoder()

C - getMimeDecoder()

D - getMimeEncoder

Q 22 - Which of the following method of Base64 class returns a Base64.Encoder that encodes using the Basic type base64 encoding scheme?

A - getDecoder()

B - getEncoder()

C - getMimeDecoder()

D - getMimeEncoder

Q 23 - Which of the following method of Base64 class returns a Base64.Decoder that decodes using the MIME type base64 decoding scheme?

A - getDecoder()

B - getEncoder()

C - getMimeDecoder()

D - getMimeEncoder

Q 24 - Which of the following method of Base64 class returns a Base64.Encoder that encodes using the MIME type base64 encoding scheme?

A - getDecoder()

B - getEncoder()

C - getMimeDecoder()

D - getMimeEncoder

Q 25 - Which of the following method of Base64 class returns a Base64.Decoder that decodes using the URL and Filename safe type base64 encoding scheme?

A - getUrlDecoder()

B - getUrlEncoder()

C - getMimeDecoder()

D - getMimeEncoder