349). Which of these class is superclass of String and StringBuffer class?

[A]java.util
[B] java.lang
[C]ArrayList
[D]None of the mentioned

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350). Which of these operators can be used to concatenate two or more String objects?

[A]+
[B]+=
[C]&
[D]||

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351). Which of this method of class String is used to obtain a length of String object?

[A]get()
[B] Sizeof()
[C]lengthof()
[D] length()

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352). Which of these method of class String is used to extract a single character from a String object?

[A]CHARAT()
[B]chatat()
[C]charAt()
[D]ChatAt()

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353). Which of these constructors is used to create an empty String object?

[A]String()
[B]String(void)
[C]String(0)
[D]None of the mentioned

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354). Which of these is an incorrect statement?

[A] String objects are immutable, they cannot be changed
[B]String object can point to some other reference of String variable
[C]StringBuffer class is used to store string in a buffer for later use
[D] None of the mentioned

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355). What will be the output of the following Java program?
    class String_demo 
    {
        public static void main(String args[])
        {
            char chars[] = {'a', 'b', 'c'};
            String s = new String(chars);
            System.out.println(s);
        }
   }

[A]a
[B]b
[C]c
[D]abc

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356). What will be the output of the following Java program?
    class String_demo 
    {
        public static void main(String args[])
        {
            int ascii[] = { 65, 66, 67, 68};
            String s = new String(ascii, 1, 3);
            System.out.println(s);
        }
   }

[A]ABC
[B]BCD
[C]CDA
[D]ABCD

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357). What will be the output of the following Java program?
    class String_demo 
    {
        public static void main(String args[])
        {
            char chars[] = {'a', 'b', 'c'};
            String s = new String(chars);
            String s1 = "abcd";
            int len1 = s1.length();
            int len2 = s.length();
            System.out.println(len1 + " " + len2);
        }
   }

[A] 3 0
[B]0 3
[C]3 4
[D] 4 3

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