Consider an Old Fashioned Telephone Booth That Can Be Occupied

question 71

Multiple Choice

Consider an old fashioned telephone booth that can be occupied by one person at a time.Suppose one person went in and dialed a part of her number, and had to leave the booth.A second person went in and dialed a part of his number, and before the number was fully dialed, a connection to some other phone was made.What Java threads analogy would prevent this undesirable scenario?
i.Acquire the lock prior to entering the booth
II.Dial a complete number when inside the booth
III.Hang up the phone and release the lock upon exiting the booth

• A)Only I
• B)I and II
• C)I and III
• D)I, II, and III

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