Tag: programming languages

Quizzes (351) Questions (7021)

Questions Related to programming languages

Multiple choice technology programming languages

What is the result of compiling and running the following code ? 1. StringBuffer s1=new StringBuffer("hello"); 2. StringBuffer s2=new StringBuffer("hello"); 3. Float f1=9.0F; 4. Double f2=9.0; 5. System.out.print(f1.equals(f2)); 6. System.out.print(s1==s2); 7. System.out.print(s1.equals(s2));

  1. Prints "truetruetrue"

  2. Prints "falsefalsetrue"

  3. Prints "falsefalsefalse"

  4. Compiler error on line 5

  5. Compiler error on line 7

  6. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Full explanation
Multiple choice technology programming languages

What will happen when you attempt to compile and run the given code? 1. public class EqualsTest 2.{ 3. public static void main(String[] args) 4.{ 5. Boolean b = new Boolean(true); 6. String str = new String(""+b); 7. StringBuffer buff = new StringBuffer(str); 8. 9. System.out.println(b.equals(str) + ", " + 10. str.equals(buff) + ", " + 11. buff.equals(b)); 12. } 13. }

  1. It will print - false, true, false

  2. It will print - true, true, false

  3. It will print - false, false, false

  4. It will print - true, false, false

  5. Compilation error

  6. ClassCastException at runtime
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation