Threads Questions and Answers

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Showing 10 of 15 questions
Q1
What is the name of the method used to start a thread execution?
  • A init();
  • B start();
  • C run();
  • D resume();
Answer: Option B
Q2
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
Answer: Option C
Q3
Which three are methods of the Object class?     notify();     notifyAll();     isInterrupted();     synchronized();     interrupt();     wait(long msecs);     sleep(long msecs);     yield();
  • A 1, 2, 4
  • B 2, 4, 5
  • C 1, 2, 6
  • D 2, 3, 4
Answer: Option C
Q4
class X implements Runnable {     public static void main(String args[])     {         /* Missing code? */     }     public void run() {} } Which of the following line of code is suitable to start a thread ?
  • A Thread t = new Thread(X);
  • B Thread t = new Thread(X); t.start();
  • C X run = new X(); Thread t = new Thread(run); t.start();
  • D Thread t = new Thread(); x.run();
Answer: Option C
Q5
Which cannot directly cause a thread to stop executing?
  • A Calling the SetPriority() method on a Thread object.
  • B Calling the wait() method on an object.
  • C Calling notify() method on an object.
  • D Calling read() method on an InputStream object.
Answer: Option C
Q6
Which two of the following methods are defined in class Thread?  start()     wait()     notify()     run()     terminate()
  • A 1 and 4
  • B 2 and 3
  • C 3 and 4
  • D 2 and 4
Answer: Option A
Q7
Which three guarantee that a thread will leave the running state?     yield()     wait()     notify()     notifyAll()     sleep(1000)     aLiveThread.join()     Thread.killThread()
  • A 1, 2 and 4
  • B 2, 5 and 6
  • C 3, 4 and 7
  • D 4, 5 and 7
Answer: Option B
Q8
Which of the following will directly stop the execution of a Thread?
  • A wait()
  • B notify()
  • C notifyall(
  • D exits synchronized code
Answer: Option A
Q9
Which method must be defined by a class implementing the java.lang.Runnable interface?
  • A void run()
  • B public void run()
  • C public void start()
  • D void run(int priority)
Answer: Option B
Q10
Which will contain the body of the thread?
  • A run();
  • B start();
  • C stop();
  • D main();
Answer: Option A

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