Quiz

1. What does the following code print?

String str = "&8a!L";
System.out.println(str.indexOf("a!L"));

1. 1. 3
   2. 2
   3. 1
   4. 0
2. What does the following code print?

String s1 = "x12";
String s2 = new String("x12");
System.out.println(s1.equals(s2)); 

2. 1. Error
   2. Exception
   3. true
   4. false
3. What does the following code print?

System.out.println("%wx6".substring(2));

• 1. wx
  2. x6
  3. %w
  4. Exception

4. What does the following code print?

System.out.println("ab"+"42".repeat(2));

1. 1. ab4242
   2. ab42ab42
   3. ab422
   4. Error

5. What does the following code print?

String s = "  ";
System.out.println(s.isBlank()+" "+s.isEmpty());

• 1. false false
  2. false true
  3. true true
  4. true false

6. Select all correct statements:
   
   1. A stream can represent a data source
   2. An input stream can write to a file
   3. A stream can represent a data destination
   4. An output...