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JAVA CERTIFICATION QUESTION: Streams and flatMap operations in Java

· java,ocp

The powerful peek() function can be tricky to use correctly in Java streams.

Given the code fragment:

What is the output? Choose one.

A. ad

B. [a,d]

C. anaddx

D. adndax

E. [[a,d][n,d][a,x]]

F. Compilation fails due to the argument to peek.






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