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Home Java Programming Declarations and Access Control See What Others Are Saying!
  • Question
  • Which of the following class level (nonlocal) variable declarations will not compile?


  • Options
  • A. protected int a;
  • B. transient int b = 3;
  • C. private synchronized int e;
  • D. volatile int d;

  • Correct Answer
  • private synchronized int e; 

    Explanation
    Option C will not compile; the synchronized modifier applies only to methods.

    Option A and B will compile because protected and transient are legal variable modifiers. Option D will compile because volatile is a proper variable modifier.


    More questions

    • 1. You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access that accomplishes this objective?

    • Options
    • A. public
    • B. private
    • C. protected
    • D. transient
    • Discuss
    • 2. What will be the output of the program?
      public class RTExcept 
      {
          public static void throwit () 
          {
              System.out.print("throwit ");
              throw new RuntimeException();
          }
          public static void main(String [] args) 
          {
              try 
              {
                  System.out.print("hello ");
                  throwit();
              }
              catch (Exception re ) 
              {
                  System.out.print("caught ");
              }
              finally 
              {
                  System.out.print("finally ");
              }
              System.out.println("after ");
          }
      }
      

    • Options
    • A. hello throwit caught
    • B. Compilation fails
    • C. hello throwit RuntimeException caught after
    • D. hello throwit caught finally after
    • Discuss
    • 3. Which of the following statements is true?

    • Options
    • A. It is sometimes good practice to throw an AssertionError explicitly.
    • B. Private getter() and setter() methods should not use assertions to verify arguments.
    • C. If an AssertionError is thrown in a try-catch block, the finally block will be bypassed.
    • D. It is proper to handle assertion statement failures using a catch (AssertionException ae) block.
    • Discuss
    • 4. Which of the following will not directly cause a thread to stop?

    • Options
    • A. notify()
    • B. wait()
    • C. InputStream access
    • D. sleep()
    • Discuss
    • 5. Which one is a valid declaration of a boolean?

    • Options
    • A. boolean b1 = 0;
    • B. boolean b2 = 'false';
    • C. boolean b3 = false;
    • D. boolean b4 = Boolean.false();
    • E. boolean b5 = no;
    • Discuss
    • 6. What will be the output of the program?
      String a = "ABCD"; 
      String b = a.toLowerCase(); 
      b.replace('a','d'); 
      b.replace('b','c'); 
      System.out.println(b);
      

    • Options
    • A. abcd
    • B. ABCD
    • C. dccd
    • D. dcba
    • Discuss
    • 7. What will be the output of the program?
      class Q207 
      { 
          public static void main(String[] args) 
          {
              int i1 = 5; 
              int i2 = 6; 
              String s1 = "7"; 
              System.out.println(i1 + i2 + s1); /* Line 8 */
          } 
      }
      

    • Options
    • A. 18
    • B. 117
    • C. 567
    • D. Compiler error
    • Discuss
    • 8. In the given program, how many lines of output will be produced?
      public class Test 
      {
          public static void main(String [] args) 
          {
          int [] [] [] x = new int [3] [] [];
          int i, j;
          x[0] = new int[4][];
          x[1] = new int[2][];
          x[2] = new int[5][];
          for (i = 0; i < x.length; i++)
          {
              for (j = 0; j < x[i].length; j++) 
              {
                  x[i][j] = new int [i + j + 1];
                  System.out.println("size = " + x[i][j].length);
              }
          }
          }
      }
      

    • Options
    • A. 7
    • B. 9
    • C. 11
    • D. 13
    • E. Compilation fails
    • Discuss
    • 9. Which of the following statements about the hashcode() method are incorrect?

      1. The value returned by hashcode() is used in some collection classes to help locate objects.
      2. The hashcode() method is required to return a positive int value.
      3. The hashcode() method in the String class is the one inherited from Object.
      4. Two new empty String objects will produce identical hashcodes.

    • Options
    • A. 1 and 2
    • B. 2 and 3
    • C. 3 and 4
    • D. 1 and 4
    • Discuss
    • 10. What will be the output of the program?
      public class X 
      {
          public static void main(String [] args) 
          {
              String names [] = new String[5];
              for (int x=0; x < args.length; x++)
                  names[x] = args[x];
              System.out.println(names[2]);
          }
      }
      
      and the command line invocation is

      > java X a b


    • Options
    • A. names
    • B. null
    • C. Compilation fails
    • D. An exception is thrown at runtime
    • Discuss


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