Java OCA OCP Practice Question 898

Question

What is the result of the following code?

Choose all that apply 

StringBuilder numbers = new StringBuilder("0123456789"); 
numbers.delete(2,  8); 
numbers.append("-").insert(2, "+"); 
System.out.println(numbers);
  • A. 01+89-
  • B. 012+9-
  • C. 012+-9
  • D. 0123456789
  • E. An exception is thrown.
  • F. The code does not compile. 


A.

Note

First, we delete the characters at index 2 until the character one before index 8.

At this point, 0189 is in numbers.

The following line uses method chaining.

It appends a dash to the end of the characters sequence, resulting in 0189-, and then inserts a plus sign at index 2, resulting in 01+89-.




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