Which of the following statements about the StringBuilder class is false? 1) The

Question

Which of the following statements about the StringBuilder class is false? 1) The StringBuilder class supports adding characters or Strings to an existing Stringbuilder object. O2) It is possible to change the current content of a String object or a StringBuilder object. 3) The StringBuilder class supports modifying the existing characters within a StringBuilder object. 4) A StringBuilder object can be used to build an output string Save Question 2 (1 point) What is the output for this loop? for (int i = 1; i

Explanation / Answer

1.

We can add characters and string in a StringBuilder object. So, option 1 is true.

We can change the current content of both objects. So, option 2 is true.

We can print the content of StringBuiler object just like a String object. So, option 4 is true.

We can not modify existing charactors with a StringBuilder object. It will show a incompatible types error.

Hence, option (3) is correct.

2.

In the for loop, i gets effectively incremented by 3 each time.

Hence, first time it print 1, then 4 and at last 7.

Output : 1 4 7

So, option (b) is correct.

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