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Question

What is the output of this program?
    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);
        }
    }

a.

Hello

b.

World

c.

Helloworld

d.

Hello World

Answer: (d).Hello World

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Q. What is the output of this program?

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