All Questions
#1 Given:
 
    1.  public abstract class Prod {
    2.    public abstract void prmth1();
    3.    public static void prmth2() {
    4.      int mth2 = 30;
    5.      System.out.println("prmth2 = " + mth2);
    6.    }
    7.    public abstract void prmth3();
    8.  }

What is the result?

(1)Compilation succeeds
(2)Compilation fails because of an error on line 1
(3)Compilation fails because of an error on line 3
(4)Compilation fails because of an error on line 7

Answer : -------------------------

#2 Given:
 
    1.  public class ClassA {
    2.    public static void main(String [] args) {
    3.   
    4.      switch(x) {
    5.        default:
    6.        System.out.println("Here it is.");
    7.      }
    8.    }
    9.  }

The ClassA class can be compiled successfully by inserting one of three possible
options on line 3. When inserted separately, which three will allow compilation
to succeed? (Choose three.)

(1)int x = 6;
(2)short x = 3;
(3)char x = 'y';
(4)long x = 354;
(5)boolean x = true;

Answer : -------------------------

#3 Given:
 
    1.  public class NewGarb {
    2.    public static Object getIt() {
    3.      Object rg = new Integer(3);
    4.      Object dg[][] = new Object[1][2];
    5.      dg[0][1] = rg;
    6.      dg[0][0] = rg;
    7.      rg = null;
    8.      return rg;
    9.    }
    10.  }

Which statement is true?

(1)The NewGarb class will not compile
(2)The getIt() method must not be declared as static
(3)The NewGarb class compiles, but an exception is received because dg is not set to null
(4)The rg object is eligible for garbage collection after a call to the getIt() method has returned

Answer : -------------------------

#4 Given:
 
    1.  public class SetFor {
    2.
    3.    public static void main(String [] args) {
    4.
    5.      System.out.println("You will need to use " + c);
    6.    }
    7.  }

Which two additions will individually allow compilation to succeed? (Choose two.)

(1)"char c;" placed on line 2
(2)"char c;" placed on line 4
(3)"char c = 'f';" placed on line 2
(4)"char c = 'f';" placed on line 4
(5)"static char c;" placed on line 2
(6)"char c = new char();" placed on line 4

Answer : -------------------------

#5Given:
 
 1.  public class TeSet {
 2.    public static void main(String args[]) {
 3.      int m = 2;
 4.      int p = 1;
 5.      int t = 0;
 6.      for(;p < 5;p++) {
 7.        if(t++ > m) {
 8.          m = p + t;
 9.        }
10.      }
11.      System.out.println("t equals " + t);
12.    }
13.  }

What is the resulting value of t?

(1)2
(2)4
(3)6
(4)7

Answer : -------------------------

#6Given:
 
 1.  class IntType {
 2.    public String getType(String a, int b, char c) {
 3.      String holdit1 = new String();
 4.      holdit1 = a;
 5.      return holdit1;
 6.    }
 7.  }
 8.
 9.  class OverType extends IntType {
10.
11.      String holdit2 = new String();
12.      holdit2 = holdit2.concat("This is ").concat(a);
13.      return holdit2;
14.    }
15.
16.    public static void main(String args[]) {
17.      OverType ot = new OverType();
18.      String x = new String("x");
19.      int y = 1;
20.      char z = 'b';
21.      System.out.println(ot.getType(x, y, z));
22.    }
23.  }


When inserted on line 10, which line will override the getType method, allowing compilation to succeed and the output "This is x"?

(1)public Char getType(String a, int b, char c) {
(2)public Char getType(int b, String a, char c) {
(3)public String getType(String a, int b, char c) {
(4)public String getType(int b, String a, char c) {

Answer : -------------------------

#7Given:
 
 1.  public class MyThread implements Runnable {
 2.    private String holdA = "This is ";
 3.    private int[] holdB = {1,2,3,4,5,6,7,8,9,10};
 4.
 5.    public static void main(String args[]) {
 6.      MyThread z = new MyThread();
 7.      (new Thread(z)).start();
 8.      (new Thread(z)).start();
 9.    }
10.
11.    public synchronized void run() {
12.      for(int w = 0;w < 10;w++) {
13.        System.out.println(holdA + holdB[w] + ".");
14.      }
15.    }
16.  }

What is the result?

(1)Compilation fails because of an error on line 6
(2)Compilation fails because of an error on line 11
(3)Compilation fails because of errors on lines 7 and 8
(4)Compilation succeeds and the program prints each value in the holdB array at the end of the "This is " line. Each value is printed two times before the program ends, and the values are not printed in sequential order
(5)Compilation succeeds & the prog. prints each val in the holdB array at the end of the "This is " line. Each val is printed in order from 1-10 & after the val 10 prints, it starts printing the vals 1-10 in order again

Answer : -------------------------

#8Given:
 
 1.  import java.awt.*;
 2.  
 3.  public class Birthdays extends Frame {
 4.    Birthdays() {
 5.      super("Birthday Reminder");
 6.      String lblsP1[] = {"Name:", "Birthday:", "Address:"};
 7.      String butnsP2[] = {"Add", "Save", "Exit"};
 8.      Panel panelTop = new Panel();
 9.      Panel panelBot = new Panel();
10.      panelTop.setLayout(new GridLayout(3,2,3,3));
11.      for(int x = 0; x < lblsP1.length; x++) {
12.        panelTop.add(new Label(lblsP1[x]));
13.        panelTop.add(new TextField());
14.      }
15.      for(int y = 0; y < butnsP2.length; y++) {
16.        panelBot.add(new Button(butnsP2[y]));
17.      }
18.      add(panelTop, BorderLayout.NORTH);
19.      add(panelBot, BorderLayout.SOUTH);
20.    }
21.  }

Which main method should you add to the Birthdays class to allow the program to compile and run with all defined fields properly displayed?

(1)public static void main(String args[]) { Frame.visible = true; }
(2)public static void main(String args[]) { Frame f = new Frame(); f.setVisible(true);}
(3)public static void main(String args[]) { Birthdays b = new Birthdays(); b.pack(); b.setVisible(true); }
(4)public static void main(String args[]) { Frame f = Birthdays.new Frame(); f.pack(); f.visible = true; }

Answer : -------------------------

#9 Given:
 
 1.  public class GetIt {
 2.    public static void main(String args[]) {
 3.      double x[] = {10.2, 9.1, 8.7};
 4.      int i[] = new int[3];
 5.      for(int a = 0;a < (x.length);a++) {
 6.
 7.        System.out.println(i[a]);
 8.      }
 9.    }
10.  }

The GetIt class should print the following:
    11
    10
    9

Which line should you insert on line 6 to accomplish this?

(1)i[a] = ((int)Math.min(x[a]));
(2)i[a] = ((int)Math.max(x[a]));
(3)i[a] = ((int)Math.ceil(x[a]));
(4)i[a] = ((int)Math.floor(x[a]));

Answer : -------------------------

#10Which statement about the Map interface is true?

(1)Entries are placed in a Map using the values() method
(2)Entries are placed in a Map using the entrySet() method
(3)A key/value association is added to a Map using the put() method
(4)A key/value association is added to a Map using the putAll() method

Answer : -------------------------

#11Consider this class:
 
1. public class Test1 {
2.   public float aMethod(float a, float b) {
3.   }
4.
5. }

Which of the following methods would be legal if added (individually) at line 4?

(1)public int aMethod(int a, int b) { }
(2)public float aMethod(float a, float b) { }
(3)public float aMethod(float a, float b, int c) throws _Exception { }
(4)public float aMethod(float c, float d) { }
(5)private float aMethod(int a, int b, int c) { }

Answer : -------------------------

#12Consider these classes, defined in separate source files:
 
1. public class Test1 {
2.   public float aMethod(float a, float b)
       throws IOException {
3.   }
4. }

1. public class Test2 extends Test1 {
2.
3. }

Which of the following methods would be legal (individually) at line 2 in class Test2?

(1)float aMethod(float a, float b) { }
(2)public int aMethod(int a, int b) throws Exception { }
(3)public float aMethod(float a, float b) throws _Exception { }
(4)public float aMethod(float p, float q) { }

Answer : -------------------------

#13You have been given a design document for a veterinary registration system for implementation in Java technology. It states: 

"A pet has an owner, a registration date, and a vaccination-due date. 
A cat is a pet that has a flag indicating if it has been neutered, and a 
textual description of its markings."

Given that the Pet class has already been defined, which of the following fields would be appropriate for inclusion in the Cat class as members?

(1)Pet thePet;
(2)Date registered;
(3)Date vaccinationDue;
(4)Cat theCat;
(5)boolean neutered;
(6)String markings;

Answer : -------------------------

#14You have been given a design document for a veterinary registration system for implementation in Java. It states: "A pet has an owner, a registration date, and a vaccination-due date. A cat is a pet that has a flag indicating if it has been neutered, and a textual description of its markings." Given that the Pet class has already been defined and you expect the Cat class to be used freely throughout the application, how would you make the opening declaration of the Cat class, up to but not including the first opening brace? Use only these words and spaces: boolean, Cat, class, Date, extends, Object, Owner, Pet, private, protected, public, String.


Answer : -------------------------

#15Consider the following classes, declared in separate source files: 
 
 1. public class Base {
 2.   public void method(int i) {
 3.     System.out.println("Value is " + i);
 4.   }
 5. }

 1. public class Sub extends Base {
 2.   public void method(int j) {
 3.     System.out.println("This value is " + j);
 4.   }
 5.   public void method(String s) {
 6.     System.out.println("I was passed " + s);
 7.   }
 8.   public static void main(String args[]) {
 9.     Base b1 = new Base();
10.     Base b2 = new Sub();
11.     b1.method(5);
12.     b2.method(6);
13.   }
14. }

What output results when the main method of the class Sub is run?

(1)Value is 5
Value is 6
(2)This value is 5
This value is 6
(3)Value is 5
This value is 6
(4)This value is 5
Value is 6
(5)I was passed 5
I was passed 6

Answer : -------------------------

#16Consider the following class definition: 
 
1. public class Test extends Base {
2.   public Test(int j) {
3.   }
4.   public Test(int j, int k) {
5.     super(j, k);
6.   }
7. }

Which of the following are legitimate calls to construct instances of the Test class?

(1)Test t = new Test();
(2)Test t = new Test(1);
(3)Test t = new Test(1, 2);
(4)Test t = new Test(1, 2, 3);
(5)Test t = (new Base()).new Test(1);

Answer : -------------------------

#17Consider the following class definition: 
 
1. public class Test extends Base {
2.   public Test(int j) {
3.   }
4.   public Test(int j, int k) {
5.     super(j, k);
6.   }
7. }

Which of the following forms of constructor must exist explicitly in the definition of the Base class?

(1)Base() { }
(2)Base(int j) { }
(3)Base(int j, int k) { }
(4)Base(int j, int k, int l) { }

Answer : -------------------------

#18Which of the following statements are true?

(1)An inner class may be declared private
(2)An inner class may be declared static
(3)An inner class defined in a method should always be anonymous
(4)An inner class defined in a method can access all the method local variables
(5)Construction of an inner class may require an instance of the outer class

Answer : -------------------------

#19Consider the following definition: 
 
 1. public class Outer {
 2.   public int a = 1;
 3.   private int b = 2;
 4.   public void method(final int c) {
 5.     int d = 3;
 6.     class Inner {
 7.       private void iMethod(int e) {
 8.
 9.       }
10.     }
11.   }
12. }

Which variables may be referenced correctly at line 8?

(1)a
(2)b
(3)c
(4)d
(5)e

Answer : -------------------------

#20Which of the following statements are true?

(1)Given that Inner is a non-static class declared inside a public class Outer, and appropriate constructor forms are defined, an instance of Inner may be constructed like this:
new Outer().new Inner()
(2)If an anonymous inner class inside the class Outer is defined to implement the interface ActionListener, it may be constructed like this:
new Outer().new ActionListener()
(3)Given that Inner is a non-static class declared inside a public class Outer and appropriate constructor forms are defined, an instance of Inner may be constructed in a static method like this:
new Inner()
(4)An anonymous class instance that implements the interface MyInterface may be constructed and returned from a method like this: 1. return new MyInterface(int x) { 2. int x; 3. public MyInterface(int x) { 4. this.x = x; 5. } 6. };

Answer : -------------------------

#21Given:

 class J {
  private static int notFinalized;
  public static int notFinalized() {return notFinalized;}
  private K k;
  private int name;
  public int name() {return name;}
  public J(K k, int i) {this.k = k; name = i; notFinalized++;}
  public void finalize() {
    synchronized (k) {
      System.out.print(name);
      notFinalized--;
      k.notify();
    }
  }
}

class K {
  private void m1() {
    J j = null;
    for (int i = 0; i < 5; i++) {
      j = new J(this, i);       // 1
    }
    Runtime.getRuntime().gc();  // 2
    synchronized (this) {
      while (J.notFinalized() > 0) {
        try {wait();} catch (InterruptedException ie) {}
      }
    }
  }
  public static void main(String[] args) {
    new K().m1();
  }
}

When the processing of line 2 begins how many objects of type J that were created at line 1 are eligible for garbage collection?

(1)0
(2)1
(3)4
(4)5
(5)Can not be determined without more information
(6)Compiler error
(7)Run time error
(8)None of the above

Answer : -------------------------

#22What is the output of the following code when compiled and run? Select two correct answers

1 public class Sample {
2	public static void main(String[] args){
3		int y=0;				
4		int x=z=1;	
5		System.out.println(y+","+x+","+z);
6	}
7 }


(1)Prints 0,1,1
(2)Error during compilation at line 3
(3)Prints 0,0,1
(4)Error during compilation at line 4
(5)Error during compilation at line 5

Answer : -------------------------

#23What is the output of the following code when compiled and run? Select one correct answer

1 public class Sample {
2	public static void main(String[] args){
3		int j = 017;
4		int i = (byte)j >> 2;
5		System.out.println(Integer.toBinaryString(i));
6	}
7 }


(1)Prints 3
(2)Error during compilation at line 4
(3)Error during compilation at line 5
(4)Prints 11
(5)Prints 0

Answer : -------------------------

#24Select three correct statements:

(1)The garbage collection thread cannot outlive the last user thread
(2)The garbage collection can be forced by invoking System.gc().
(3)The garbage collection thread is a non-deamon thread
(4)The finalize() method is invoked at most once by the JVM for any given object
(5)The finalize() method may resurrect the object upon which it has been invoked

Answer : -------------------------

#25What is the output of the following code when compiled and run? Select one correct answer.
 
import java.io.*;
public class TechnoSample {
	public static void main(String[] args) {
		TechnoSampleSub myref = new TechnoSampleSub();
		try{
			myref.test();
		}catch(IOException ioe){}
	}
	void test() throws IOException{
		System.out.println("In TechnoSample");
		throw new IOException();
	}
}
class TechnoSampleSub extends TechnoSample {
	void test() {
		System.out.println("In TechnoSampleSub");
	}
}


(1)Prints: 
	In TechnoSampleSub
(2)Prints: 
	In TechnoSample
(3)Prints: 
	In TechnoSample
        In TechnoSampleSub
(4)Prints: 
	In TechnoSampleSub
        In TechnoSample
(5)The code does not compile

Answer : -------------------------

#26What is the output of the following code when compiled and run with the following command line: java TechnoSample two three? Select two correct answers.

public class TechnoSample {
	public static void main(String[] args) throws Exception {
		int i=2;
		boolean b = true;
		throw new Exception("Values are:"+(b!=b)+","+(i=args.length)+","+(b=i==2));
	}
}


(1)The exception message is Values are:false,3,true
(2)The exception message is Values are:true,2,false
(3)The exception message is Values are:false,2,true
(4)The final value of b is false
(5)An exception is thrown at runtime

Answer : -------------------------

#27Select two correct statements about the code given below? 

class A{}
class B extends A implements E{}	//line 1
class C extends A{}
class D extends B{}
interface E{}
public class Question07 {
	public static void main(String[] args) {
		A a = new D();	//line 2
		C c = new C();	//line 3
		E e = (E)a;	//line 4
		B b = (B)e;	//line 5
	}
}


(1)The code compiles without error and runs fine
(2)Compilation error on line 1 because interface E is not yet declared (forward-referencing)
(3)Compilation error on line 4 because class A does not implement interface E
(4)The cast on line 4 is mandatory
(5)The cast on line 5 is not mandatory

Answer : -------------------------

#28How many objects are eligible for garbage collection immediately after line 1? Select one correct answer. 

public class TechnoGC {
	public static void main(String[] args) {
		TechnoGC tGC = new TechnoGC();
		tGC.doSomething();	//line 1
		Thread.sleep(20000);
	}

	public void doSomething(){
		Object[] objArray = new Object[2];
		for(int i = 0 ; i < objArray.length ; i++) {
			objArray[i] = new Object();
		}
	}
}


(1)0
(2)1
(3)2
(4)3
(5)4

Answer : -------------------------

#29What is the output of the following code when compiled and run? Select one correct answer. 

public class TechnoSample {
	public static void main(String[] args) {
		try {
			int i = (int)(Math.random()*10);
			if(i<=5)
				System.out.println("i = "+i);
			else
				throw new Exception("i > 5");
		} catch (Exception e){
			System.err.println(e.getMessage()+" (i="+i+")");
		}
	}
}


(1)The output cannot be determined
(2)Compilation error
(3)An exception is thrown at runtime
(4)Output is i = 2
(5)Output is i > 5 (i=6)

Answer : -------------------------

#30What is the output of the following code when compiled and run? Select one correct answer.
 
public class TechnoSample {
	public static void main(String[] args) {
		new TechnoSample().doSomething();
	}

	public void doSomething(){
		int i=5;
		Thread t = new Thread(new Runnable(){
			public void run(){
				for(int j=0;j<=i;j++){
					System.out.print(" "+j);
				}
			}
		});
		t.start();
	}
}


(1)Prints 0 1 2 3 4
(2)Compilation error
(3)No output
(4)IllegalThreadStateException is thrown at runtime
(5)Prints 0 1 2 3 4 5

Answer : -------------------------

#31What is the output of the following code when compiled and run? Select one correct answer.
 
public class TechnoSample {
	public static void main(String[] args) {
		StringBuffer buf1 = new StringBuffer("Hello W");
		addSomeStuff(buf1);
		System.out.println(buf1.toString());
	}

	public static void addSomeStuff(StringBuffer buf){
		StringBuffer b = buf.replace(6,10,"orld");
		System.out.println(b.delete(0,1).toString());
	}
}


(1)Prints
 
	Hello World	
        Hello World
(2)Prints
 
	Hello orld	
        Hello orld
(3)Prints
 
	Hello orld	
        ello orld
(4)Prints
 
	ello orld	
        ello orld
(5)Compilation error

Answer : -------------------------

#32What is the output of the following code when compiled and run? Select two correct answers. (Note: when an instance of a Vector is printed, its content appear between square brackets [])

import java.util.*;
public class TechnoSample {
	public static void main(String[] args) {
		Vector col = new Vector();
		col.add(new Integer(1));
		col.add(new Integer("2"));
		col.add(new Float(3.2d));	//line 1
		col.add(col.elementAt(1));
		col.setElementAt(col.elementAt(2),0);
		System.out.println(col);
	}
}


(1)Compilation error on line 1
(2)Only line 1 won't compile
(3)The code compiles and runs fine
(4)Prints [3.2, 2, 3.2, 2]
(5)Prints [1, 2, 3.2, 2]

Answer : -------------------------

#33What is the output of the following code when compiled and run? ('\u0048' is 'H' and '\u000a' is a linefeed (LF)). Select two correct answers. 

public class TechnoSample {
	public static void main(String[] args) {
		String s = "\u0048ello\u000aWorld!";
		System.out.println(s);
	}
}


(1)Prints: 
 
	Hello
        World!
(2)Prints Hello World!(linefeed is ignored)
(3)Compilation error
(4)Compiles fine, but an exception is thrown at runtime
(5)Unicode characters like '\u0048' may be used to create String literals

Answer : -------------------------

#34What is the output of the following code when compiled and run? Select two correct answers.

public class TechnoSample {
	public static void main(String[] args) {
		int i = 2;
		try {
			if((i/=(int)Math.floor(Math.random())) > 1)
				System.out.println("No arithmetic exception");
		} catch (ArithmeticException ae){
			System.err.println("Arithmetic exception caught");
		}
	}
}


(1)Compilation error
(2)No arithmetic exception will never be printed
(3)The final value of i is 2
(4)The final value of i is 0
(5)The try-catch block is necessary for the code to compile

Answer : -------------------------

#35What is the output of the following code when compiled and run? Select two correct answers.

public class TechnoSample {
	public static void main(String[] args) throws Exception{
		Thread t1 = new Thread(getRunnable(3));
		Thread t2 = new Thread(getRunnable(4));
		t1.join();
		System.out.println("End");
	}

	public static Runnable getRunnable(final int id){
		return new Runnable(){
			public void run(){
				for(int i = 0; i < id; i++){
					System.out.print(" "+i);
				}
			}
		};
	}
}


(1)The output will always be the same whatever the underlying platform is
(2)Prints: End
(3)Prints: 
 
	0 1 2
        End
(4)The output cannot be determined
(5)Compilation error

Answer : -------------------------

#36What is the output of the following code when compiled and run? Select two correct answers.
 
public class TechnoSample {
	public static void main(String[] args){
		for(int i = 0;  i < 10; i++){
			System.out.println(getPrimitive(127));	//line 1
		}
	}
	public static int getPrimitive(byte b){	//line 2
		return (short)(Math.random()*b);	//line 3
	}
}


(1)Compilation error on line 1
(2)Compilation error on line 2
(3)Compilation error on line 3
(4)Line 3 compiles fine
(5)Prints 10 random numbers between 0 and 127

Answer : -------------------------

#37Select three correct statements.

(1)A static method may override another static method
(2)A static method cannot override a non-static method
(3)A non-static method cannot override a static method
(4)A non-static method may be overloaded by a static method
(5)A synchronized method cannot be overridden

Answer : -------------------------

#38Select three correct statements about the following code.
  
public class TechnoSample  {
	public static void main(String[] args) {
		TechnoSample myref = new TechnoSampleSub();
		try{
			myref.test();
		}catch(Exception e){}
	}
	void test() throws Exception{
		System.out.println("In TechnoSample");
		throw new Exception();
	}
}
class TechnoSample Sub extends TechnoSample {
	void test() {
		System.out.println("In TechnoSampleSub");
	}
}


(1)The try-catch block that encloses myref.test(); is mandatory for the code to compile
(2)Prints: In TechnoSample
(3)Prints: In TechnoSampleSub
(4)Method test() in class TechnoSampleSub has no obligation to declare a throws clause
(5)An exception is thrown at runtime

Answer : -------------------------

#39Given the following code:

import java.util.Date;
      
public class Example {
        public static void main(String args[]) {
                Date d1 = new Date (99, 11, 31);
                Date d2 = new Date (99, 11, 31);
                method(d1, d2);
                System.out.println("d1 is " + d1 
                                + "\nd2 is " + d2);
        }
      
        public static void method(Date d1, Date d2) {
                d2.setYear (100);
                d1 = d2;
        }
}

Which one or more of the following correctly describe the behavior when this program is compiled and run?


(1)compilation is successful and the output is:
d1 is Fri December 31 00:00:00 GMT 1999 d2 is Fri December 31 00:00:00 GMT 1999
(2)compilation is successful and the output is:
d1 is Fri December 31 00:00:00 GMT 1999 d2 is Sun December 31 00:00:00 GMT 2000
(3)compilation is successful and the output is:
d1 is Sun December 31 00:00:00 GMT 2000 d2 is Sun December 31 00:00:00 GMT 2000
(4)the assignment 'd1 = d2' is rejected by the compiler because the Date class cannot overload the operator '='
(5)the expression (d1 is " + d1 + "\nd2 is " + d2) is rejected by the compiler because the Date class cannot overload the operator '+'

Answer : -------------------------

#40Read this piece of code carefully

            if("String".toString() == "String")

                System.out.println("Equal");

            else

                System.out.println("Not Equal");


(1)the code will compile an print "Equal"
(2)the code will compile an print "Not Equal"
(3)the code will cause a compiler error

Answer : -------------------------

#41Given the following code 

class Base{
    static int oak=99;
}

public class Doverdale extends Base {
    public static void main(String argv[]) {
        Doverdale d = new Doverdale();
        d.amethod();
    }

    public void amethod() {
        //Here
    }       
}


Which of the following if placed after the comment //Here, will compile and modify the value of the variable oak?


(1)super.oak = 1;
(2)oak = 33;
(3)Base.oak = 22;
(4)oak = 50.1;

Answer : -------------------------

#42What will happen when you attempt to compile and run the following code?

public class TechnoSample {
    public static void main(String argv[]) {
        TechnoSample inc = new TechnoSample();
        int i =0; 
        inc.fermin(i);
        i = i++;
        System.out.println(i);
    }

    void fermin(int i) {
        i++;
    }
}


(1)Compile time error
(2)Output of 2
(3)Output of 1
(4)Output of 0

Answer : -------------------------

#43Given the following class

public class ZeroPrint {
    public static void main(String argv[]) {
        int i =0;
        //Here  
    }
}

Which of the following lines if placed after the comment //Here will print out 0.

(1)System.out.println(i++);
(2)System.out.println(i+'0');
(3)System.out.println(i);
(4)System.out.println(i--);

Answer : -------------------------

#44What will happen when you attempt to compile and run this code? 

private class Base {}

public class Vis {
        transient int  iVal;

        public static void main(String elephant[]) {
        }
}


(1)Compile time error: Base cannot be private
(2)Compile time error indicating that an integer cannot be transient
(3)Compile time error transient not a data type
(4)Compile time error malformed main method

Answer : -------------------------

#45What best describes the appearance of an application with the following code? 

import java.awt.*;

public class FlowAp extends Frame {
    public static void main(String argv[]) {
        FlowAp fa=new FlowAp();
        fa.setSize(400,300);
        fa.setVisible(true);
    }

    FlowAp() {
        add(new Button("One"));
        add(new Button("Two"));
        add(new Button("Three"));
        add(new Button("Four"));
    }//End of constructor
}//End of Application


(1)A Frame with buttons marked One to Four placed on each edge
(2)A Frame with buutons marked One to four running from the top to bottom
(3)A Frame with one large button marked Four in the Centre
(4)An Error at run time indicating you have not set a LayoutManager

Answer : -------------------------

#46What will happen when you attempt to compile and run the following code?

public class Bground extends Thread {
    public static void main(String argv[]) {
        Bground b = new Bground();
        b.run();
    }
    
    public void start() {
        for (int i = 0; i <10; i++) {
            System.out.println("Value of i = " + i);
        }
    }
}


(1)A compile time error indicating that no run method is defined for the Thread class
(2)A run time error indicating that no run method is defined for the Thread class
(3)Clean compile and at run time the values 0 to 9 are printed out
(4)Clean compile but no output at runtime

Answer : -------------------------

#47

int Output = 10;
boolean b1 = false;

if((b1 == true) && ((Output += 10) == 20))
{
    System.out.println("We are equal " + Output);
}
else
{
    System.out.println("Not equal! " + Output);
}


(1)Compilation error, attempting to perform binary comparison on logical data type
(2)Compilation and output of "We are equal 10"
(3)Compilation and output of "Not equal! 20"
(4)Compilation and output of "Not equal! 10"

Answer : -------------------------

#48Given the following code, what will be the output?

class Value
{
    public int i = 15;
} //Value

public class Test
{
    public static void main(String argv[])
	{
        Test t = new Test();
        t.first();
    }

    public void first()
    {
        int i = 5;
        Value v = new Value();
        v.i = 25;
        second(v, i);
        System.out.println(v.i);
    }

    public void second(Value v, int i)
    {
        i = 0;
        v.i = 20;
        Value val = new Value();
        v =  val;
        System.out.println(v.i + " " + i);
    }
} // Test


(1)
15 0
20
(2)
15 0
15
(3)
20 0
20
(4)
0 15
20

Answer : -------------------------

#49Given the code below, and making no other changes, which access modifiers (public, protected or private) can legally be placed before myMethod() on line 3? If line 3 is left as it is, which keywords can legally be placed before myMethod on line 8?

1.  class HumptyDumpty
2.  {
3.      void myMethod() {}
4.  }
5.
6.  class HankyPanky extends HumptyDumpty
7.  {
8.      void myMethod() {}
9.  }


(1)private or nothing (i.e. leaving it as it is) on line 3. Nothing (i.e. leaving it as it is) or protected or public on line 8
(2)public or protected on line 3. private or nothing (i.e. leaving it as it is) on line 8
(3)nothing (i.e. leaving it as it is) or protected or public on line 3. private or nothing (i.e. leaving it as it is) on line 8
(4)None of the above

Answer : -------------------------

#50What is the result when you compile and run the following code?

public class ThrowsDemo 
{  
    static void throwMethod() 
    {  
        System.out.println("Inside throwMethod.");  
        throw new IllegalAccessException("demo");  
    }
  
    public static void main(String args[]) 
    {  
        try 
        {  
            throwMethod();  
        } 
        catch (IllegalAccessException e) 
        {  
            System.out.println("Caught " + e);  
        }  
    }  
} // ThrowsDemo


(1)Compilation error
(2)Runtime error
(3)Compile successfully, nothing is printed
(4)Inside throwMethod. followed by caught: java.lang.IllegalAccessExcption: demo

Answer : -------------------------
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