41. Which of the following will ensure the thread will be in running state?

1. 1. Thread.killThread()

   
   
   

   2. yield()

   
   
   

   3. notify()

   
   
   

   4. wait()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   wait() always causes the current thread to go into the object’s wait pool. Hence, using this in a thread will keep it in running state.

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42. Which of the following stops execution of a thread?

1. 1. Calling read() method on an InputStream object

   
   
   

   2. Calling SetPriority() method on a Thread object

   
   
   

   3. Calling notify() method on an object

   
   
   

   4. Calling wait() method on an object

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   notify() wakes up a single thread which is waiting for this object.

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43. Which of these package provides the ability to read and write in Zip format?

1. 1. java.util.zar

   
   
   

   2. java.lang

   
   
   

   3. java.io

   
   
   

   4. java.util.zip

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   java.util.zip

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44. What is true about threading?

1. 1. run() method creates new thread

   
   
   

   2. run() method calls start() method and runs the code

   
   
   

   3. start() method creates new thread and calls code written in run() method

   
   
   

   4. run() method can be called directly without start() method being called

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   start() eventually calls run() method. Start() method creates thread and calls the code written inside run method.

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45. What should not be done to avoid deadlock?

1. 1. Use interruptible locks

   
   
   

   2. Avoid using multiple threads

   
   
   

   3. Avoid hold several locks at once

   
   
   

   4. Execute foreign code while holding a lock

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   To avoid deadlock situation in Java programming do not execute foreign code while holding a lock.

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