Assessment Test

  1. What is the result of the following class? (Choose all that apply)
    1: public class _C {
    2:  private static int $;
    3:  public static void main(String[] main) {
    4:    String a_b;
    5:    System.out.print($);
    6:    System.out.print(a_b);
    7:  } }
    1. Compiler error on line 1.
    2. Compiler error on line 2.
    3. Compiler error on line 4.
    4. Compiler error on line 5.
    5. Compiler error on line 6.
    6. 0null
    7. nullnull
  2. What is the result of the following code?
    String s1 = "Java";
    String s2 = "Java";
    StringBuilder sb1 = new StringBuilder();
    sb1.append("Ja").append("va");
    System.out.println(s1 == s2);
    System.out.println(s1.equals(s2));
    System.out.println(sb1.toString() == s1);
    System.out.println(sb1.toString().equals(s1));
    1. true is printed out exactly once.
    2. true is printed ...

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