Java expert please help me QUESTION 34 Which of the following best describes Sal

ID: 3834216 • Letter: J

Question

Java expert please help me

QUESTION 34

Which of the following best describes Sally?

A - Sally cannot be used in a HashSet because it is not serializable

B - Sally will not compile because to override equals, the signature must be boolean equals(Sally obj)

C - Sally should not be used in a HashSet because equal objects may have different hash values.

D - Sally can be used in a HashSet, but the HashSet will perform poorly because of collisions

QUESTION 35

If no locale is explicitly supplied for user messages, the system uses messages associated with US English.

True

False

QUESTION 36

You should always invoke the unlock method in the finally clause.

true

false

QUESTION 37

Under what conditions are locks unnecessary for multi-threaded programs?

A- when the threads are different classes

B- when the threads do not share data

C - when the shared data only has a single method

D - when the threads are all of the same class

A - Sally cannot be used in a HashSet because it is not serializable

B - Sally will not compile because to override equals, the signature must be boolean equals(Sally obj)

C - Sally should not be used in a HashSet because equal objects may have different hash values.

D - Sally can be used in a HashSet, but the HashSet will perform poorly because of collisions

37. OptionB- when the threads do not share data

When the threads do not share data, locks are not required for multi-threaded programs.

36. True

Yes, we should always invoke the unlock method in the finally clause.

35. True

34. Option C

C - Sally should not be used in a HashSet because equal objects may have different hash values.

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