class output { public static void main(String args[]) { StringBuffer c = new StringBuffer("Hello"); StringBuffer c1 = new StringBuffer(" World"); c.append(c1); System.out.println(c); } }
Options:
A .  Hello
B .  World
C .  Helloworld
D .  Hello World
Answer: Option D
append() method of class StringBuffer is used to concatenate the string representation to the
end of invoking string. Output: $ javac output.java $ java output Hello World
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