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Question

Which two are valid constructors for Thread?

    1. Thread(Runnable r, String name)

    2. Thread()

    3. Thread(int priority)

    4. Thread(Runnable r, ThreadGroup g)

    5. Thread(Runnable r, int priority)



Options:
A .  1 and 3
B .  2 and 4
C .  1 and 2
D .  2 and 5
Answer: Option C

(1) and (2) are both valid constructors for Thread.

(3), (4), and (5) are not legal Thread constructors, although (4) is close. If you reverse the 

arguments in (4), you'd have a valid constructor.



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