MANAGING DATABASES WITH ORACLE QUIZ

What will happen after compiling and running following code?class A implements Runnable{ public void run(){ System.out.println("run-a"); }}1. public class Test{2. public static void main(String... args){3. A a = new A();4. Thread t = new Thread(a);5. t.start();6. t.start();7. }8. }

run-a

Compilation fails with an error at line 6

Compilation succeed but Runtime Exception

None of these

run-a run-a

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What will be the output after compiling and executing the following code?public class Test implements Runnable{ public static void main(String[] args) throws InterruptedException{ Thread a = new Thread(new Test()); a.start(); System.out.print("Begin"); a.join(); System.out.print("End"); } public void run(){ System.out.print("Run"); }}

"BeginEndRun" is printed.

"BeginEnd" is printed.

Compilation fails.

An exception is thrown at runtime.

"BeginRunEnd" is printed.

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What will happen when you attempt to compile and run the following code?1. public class Test extends Thread{2. public static void main(String argv[]){3. Test t = new Test();4. t.run();5. t.start();6. }7. public void run(){8. System.out.println("run-test");9. }10. }

None of these

Compilation fails due to an error on line 7

run-test

run-test run-test

Compilation fails due to an error on line 4

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Given the code. What will be the result?public class Test implements Runnable{ public static void main(String[] args) throws InterruptedException{ Thread a = new Thread(new Test()); a.start(); System.out.print("Begin"); a.join(); System.out.print("End"); } public void run(){ System.out.print("Run"); }}

An exception is thrown at runtime.

"BeginRunEnd" is printed.

"BeginEnd" is printed.

"BeginEndRun" is printed.

Compilation fails.

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What notifyAll() method do?

Wakes up all threads that are not waiting on this object's monitor

None of these

Wakes up one threads that are waiting on this object's monitor

Wakes up all threads that are waiting on this object's monitor

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

Thread(Runnable threadOb, int priority)

Thread(String threadName, int priority)

None of these

Thread(Runnable threadOb, String threadName)

Thread(int priority)

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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"); }}

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

None of these

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

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

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Predict the output:public class Test extends Thread{ private int i; public void run(){ i++; } public static void main(String[] args){ Test a = new Test(); a.run(); System.out.print(a.i); a.start(); System.out.print(a.i); }}

Prints

IllegalThreadStateException is thrown

Compiler error

Prints

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What is the output for the below code ?public class Test extends Thread{ public static void main(String argv[]){ Test t = new Test(); t.run(); } public void start(){ for(int i = 0; i < 10; i++){ System.out.println("Value of i = " + i); } }}

None of these

A run time error indicating that no run method is defined for the Thread class

Clean compile but no output at runtime

Clean compile and at run time the values 0 to 9 are printed out

A compile time error indicating that no run method is defined for the Thread class

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Analyze the following code:public class Test implements Runnable{ public static void main(String[] args){ Test t = new Test(); t.start(); } public void run() { }}

The program compiles, but it does not run because the start() method is not defined.

The program does not compile because the start() method is not defined in the Test class.

The program compiles and runs fine.

The program compiles, but it does not run because the run() method is not implemented.

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