Test on JAVA Test on P9

This article presents Test on JAVA Test on P9 in a clear, structured format. It helps readers review key concepts, test their understanding, and learn from the material.

Understanding Test on JAVA Test on P9

• Question 1. Which of the following program segments results?

  double a = 3, b = 5, c = 2;
  
  double delta = b * b - 4 * a * c;
  
  if (delta <0) System.out.println ('Comforty virginity');
  
  else if (delta == 0) System.out.println ('Simple method');
  
  else System.out.println ('The method has two components');

  • The perfect virgin
  • The method has a sound
  • The method has two options
  • Compilation error
• Question 2. Which of the following program segments results?

  double a = 5, b = 3, c = 2;
  
  double delta = b * b - 4 * a * c;
  
  if (delta <0) System.out.println ('Comforty virginity');
  
  else if (delta == 0) System.out.println ('Simple method');
  
  else System.out.println ('The method has two components');

  • The perfect virgin
  • The method has a sound
  • The method has two options
  • Compilation error
• Question 3. What is the following command to print the result:

  double x = 10000.0/3.0;
  
  System.out.print (x);

  • 3333.3333333333335
  • 3333.33
  • 3334.0
  • 3332.0
• Question 4. Select the display format when executing the following statement:

  System.out.printf ('% tc', new Date ());

  • Sun Dec 02 2010
  • Sun Dec 02 17:26:19 ICT 2010
  • Sunday December 02 2010
  • Sunday December 05:26:00 ICT 2010
• Question 5. Select the display format when executing the following statement:

  System.out.printf ('% 1 $ s% 2 $ B% 2 $ te,% 2 $ Y', 'Due date:', new Date ());

  • Due date: Dec 02 2010
  • Sun Dec 02 2010
  • Dec 02, 2010
  • Due date: Dec 02, 2010
• Question 6. Which command is only used in case of nested loops?
  • label
  • jump
  • array
  • There is no right answer
• Question 7. Which of the following statements is true?

  a.char [] str;
  
  b.char [] str = new char [15];
  
  char [] str = new ['A', 'B'];

  • twelfth
  • 2, 3
  • 1, 3
  • 1, 2, 3
• Question 8. Which of the following interface definitions is invalid?
  • public interface inout {}
  • protected interface inout {int i = 12;}
  • interface inout {public final int MAX_INDEX = 100;}
  • interface input {public void indl ();}
• Question 9. Given String str = 'univerity', which of the following commands takes the string 'univer' and binds string str1?
  • String str1 = str.substring (0, 6);
  • String str1 = str.substring (0, 5);
  • String str1 = str.substring (1, 6);
  • String str1 = str.substring (5);
• Question 10. Given str = 'Yunlin universtiy', what is the result of str.indexOf ('uni')?
  • first
  • 7
  • 15
  • Wrong command