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Threads - Programming

Q1:

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)

A 1 and 3

B 2 and 4

C 1 and 2

D 2 and 5

ANS:C - 1 and 2

(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.