Oracle

1Z0-851 · Question #199

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)

The correct answer is A. When using versions of Java technology earlier than 5.0. B. When sharing a StringBuffer among multiple threads. See the full explanation below for the reasoning.

Question

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)

Options

AWhen using versions of Java technology earlier than 5.0.
BWhen sharing a StringBuffer among multiple threads.
CWhen using the java.io class StringBufferInputStream.
DWhen you plan to reuse the StringBuffer to build more than one string.

How the community answered

(32 responses)

A
81% (26)
C
13% (4)
D
6% (2)

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion

Full 1Z0-851 Practice