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
-
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