Question 11: -- Consider the statements below: String a = "JAVA: "; String b = "How to "; String c = "Program"; Which of the statements below will create the String r1 = "JAVA: How to Program"? String r1 = c.concat(b.concat(a)); String r1 = a.concat(b.concat(c)); String r1 = b.concat(c.concat(a)); String r1 = c.concat(c.concat(b)); Flag this Question

Question 12: -- Which of the following is not a method of class String? toUpperCase trim toCharacterArray All of the above are methods of class String Flag this Question

Question 13: -- StringBuilder objects can be used in place of String objects if ________. the string data is not constant the string data size may grow the programs frequently perform string concatenation All of the above. Flag this Question

Question 14: -- Given the following declaration: StringBuilder buf = new StringBuilder(); What is the capacity of buf? 0 10 16 20 Flag this Question

Question 15: -- Which of the following statements is true? The capacity of a StringBuilder is equal to its length The capacity of a StringBuilder cannot exceed its length. The length of a StringBuilder cannot exceed its capacity. Both a and b are true. Flag this Question