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Q 1 - Which of the following functional interface represents an operation that accepts two input arguments, and returns no result?
BiConsumer<T,U> functional interface represents an operation that accepts two input arguments, and returns no result.
Q 2 - Which of the following functional interface represents an operation upon two operands of the same type, producing a result of the same type as the operands?
BinaryOperator<T> functional interface represents an operation upon two operands of the same type, producing a result of the same type as the operands.
Q 3 - Which of the following functional interface represents a function that accepts one argument and produces a result?
Function<T,R> functional interface represents a function that accepts one argument and produces a result.
Q 4 - Which of the following functional interface represents a predicate (Boolean-valued function) of one long-valued argument?
LongPredicate functional interface represents a predicate (Boolean-valued function) of one long-valued argument.
Q 5 - Which of the following functional interface represents a supplier of results?
Supplier<T> functional interface represents a supplier of results.
Q 6 - 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.
The 'filter' method is used to eliminate elements based on a criteria.
Q 7 - Which of the following API represents a specialized date-time API to deal with various timezones in java8?
Zoned − Specialized date-time API to deal with various timezones.
Q 8 - Which of the following method of Base64 class returns a Base64.Encoder that encodes using the MIME type base64 encoding scheme?
getMimeEncoder() method of Base64 class returns a Base64.Encoder that encodes using the MIME type base64 encoding scheme.
Optional is a container object which is used to contain not-null objects.
Q 10 - java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.
java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.