Quiz for Stream API

Q1: What is the primary purpose of Java Stream API?

A. To manage memory B. To process collections of data C. To handle exceptions D. To compile code

Q2: Which method converts a list to a stream?

A. toStream() B. stream() C. listToStream() D. convertStream()

Q3: What does the 'filter()' method do in a stream?

A. Modifies every element B. Sorts the elements C. Removes elements based on a condition D. Duplicates elements

Q4: Which stream method transforms each element?

A. forEach() B. map() C. reduce() D. collect()

Q5: Which terminal operation returns a result by combining elements?

A. map() B. filter() C. reduce() D. peek()

Q6: Which operation is intermediate in Stream API?

A. forEach() B. collect() C. map() D. reduce()

Q7: Which is a terminal operation?

A. filter() B. map() C. sorted() D. collect()

Q8: What does forEach() do?

A. Processes each element B. Filters data C. Sorts data D. Converts stream to list

Q9: Which interface does Stream API belong to?

A. List B. Stream C. Set D. Map

Q10: What is the output of count()?

A. boolean B. int C. long D. double