Threads -Java Programming MCQ Questions and Answers

1.
In java a thread can be created by ..........

A. Extending the thread class.

B. Implementing Runnable interface.

C. Both of the above

D. None of these

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2.
When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.

A. start()

B. run()

C. init()

D. go()

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3.

What will be the output of the following program code?

public class Test implements Runnable{
        public static void main(String[] args){
                Thread t = new Thread(this);
                t.start();
        }

        public void run(){
                System.out.println("test");
        }
}

A. The program does not compile because this cannot be referenced in a static method.

B. The program compiles fine, but it does not print anything because t does not invoke the run() method

C. The program compiles and runs fine and displays test on the console.

D. None of the above

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4.
Which of the following constructor of class Thread is valid one?

A. Thread(Runnable threadOb, int priority)

B. Thread(int priority)

C. Thread(Runnable threadOb, String threadName)

D. Thread(String threadName, int priority)

E. None of these

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5.

Analyze the following code:

public abstract class Test implements Runnable{
        public void doSomething() { };
}

A. The program will not compile because it does not implement the run() method.

B. The program will not compile because it does not contain abstract methods.

C. The program compiles fine.

D. None of the above

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1 2 3 4 5

1.
In java a thread can be created by ..........

Answer & Solution

2.
When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.

Answer & Solution

3.
What will be the output of the following program code?

`public class Test implements Runnable{ public static void main(String[] args){ Thread t = new Thread(this); t.start(); } public void run(){ System.out.println("test"); } }`

Answer & Solution

4.
Which of the following constructor of class Thread is valid one?

Answer & Solution

5.
Analyze the following code:

`public abstract class Test implements Runnable{ public void doSomething() { }; }`

Answer & Solution

Threads -Java Programming MCQ Questions and Answers

1. In java a thread can be created by ..........

Answer & Solution

2. When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.

Answer & Solution

3. What will be the output of the following program code? public class Test implements Runnable{ public static void main(String[] args){ Thread t = new Thread(this); t.start(); } public void run(){ System.out.println("test"); } }

Answer & Solution

4. Which of the following constructor of class Thread is valid one?

Answer & Solution

5. Analyze the following code: public abstract class Test implements Runnable{ public void doSomething() { }; }

Answer & Solution

1.
In java a thread can be created by ..........

2.
When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.

3.
What will be the output of the following program code?

`public class Test implements Runnable{ public static void main(String[] args){ Thread t = new Thread(this); t.start(); } public void run(){ System.out.println("test"); } }`

4.
Which of the following constructor of class Thread is valid one?

5.
Analyze the following code:

`public abstract class Test implements Runnable{ public void doSomething() { }; }`