Given:

What is the result?

1. A. IT:null
2. B. A NullPointerException is thrown at run time.
3. C. A compilation error occurs.
4. D. IT:0.0

Correct Answer: D

Given the code fragment:
List empDetails = Arrays.asList(“100, Robin, HR”, “200, Mary, AdminServices”,
“101, Peter, HR”);
empDetails.stream()
.filter(s-> s.contains(“1”))
.sorted()
.f orEach(System.out::println); //line n1
What is the result?

1. A. 100, Robin, HR101, Peter, HR
2. B. A compilation error occurs at line n1.
3. C. 100, Robin, HR101, Peter, HR200, Mary, AdminServices
4. D. 100, Robin, HR200, Mary, AdminServices101, Peter, HR

Correct Answer: A

Given:
public class Canvas implements Drawable { public void draw () { }
}
public abstract class Board extends Canvas { }
public class Paper extends Canvas { protected void draw (int color) { }
}
public class Frame extends Canvas implements Drawable { public void resize () { }
}
public interface Drawable { public abstract void draw ();
}
Which statement is true?

1. A. Board does not compile.
2. B. Paper does not compile.
3. C. Frame does not compile.
4. D. Drawable does not compile.
5. E. All classes compile successfully.

Correct Answer: E

Given the code fragments:
class MyThread implements Runnable {
private static AtomicInteger count = new AtomicInteger (0); public void run () {
int x = count.incrementAndGet(); System.out.print (x+” “);
}
}
and
Thread thread1 = new Thread(new MyThread()); Thread thread2 = new Thread(new MyThread()); Thread thread3 = new Thread(new MyThread()); Thread [] ta = {thread1, thread2, thread3};
for (int x= 0; x < 3; x++) { ta[x].start();
}
Which statement is true?

1. A. The program prints 1 2 3 and the order is unpredictable.
2. B. The program prints 1 2 3.
3. C. The program prints 1 1 1.
4. D. A compilation error occurs.

Correct Answer: A

Given the content of /resourses/Message.properties: welcome1=”Good day!”
and given the code fragment: Properties prop = new Properties ();
FileInputStream fis = new FileInputStream (“/resources/Message.properties”); prop.load(fis);
System.out.println(prop.getProperty(“welcome1”)); System.out.println(prop.getProperty(“welcome2”, “Test”));//line n1 System.out.println(prop.getProperty(“welcome3”));
What is the result?

1. A. Good day!Testfollowed by an Exception stack trace
2. B. Good day!followed by an Exception stack trace
3. C. Good day!Test null
4. D. A compilation error occurs at line n1.

Correct Answer: C