Which is thread safe ? (a) Only the variable num (b) Only the HttpServletRequest object req (c) Both the variable num & the HttpServletRequest object req

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Feb 20th, 2004
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Rizwan Ahmed

Apr 23rd, 2006

(b) Only the HttpServletRequest object req
Thread safety of the variable is depend on the scope of the variable.
Local variable-thread safe
instance variable-not thread safe(yes for Single thread model)
class variable-not thread safe