Strings

What will be the output of the following Java code?

    class output

    {

        public static void main(String args[])

        {

            char ch;

            ch = "hello".charAt(1);

            System.out.println(ch);

        }

   }

• h

• e

• l

• o

What will be the output of the following Java code? 

    class output

    {

        public static void main(String args[])

        {

            char c[]={'a', '1', 'b' ,' ' ,'A' , '0'};

            for (int i = 0; i < 5; ++i)

            {

                   if(Character.isDigit(c[i]))

                       System.out.println(c[i]+" is a digit");

                   if(Character.isWhitespace(c[i]))

                       System.out.println(c[i]+" is a Whitespace character");

                   if(Character.isUpperCase(c[i]))

                       System.out.println(c[i]+" is an Upper case Letter");

                   if(Character.isLowerCase(c[i]))

                       System.out.println(c[i]+" is a lower case Letter");

               i=i+3;

            }

        }

    }

•     1.a is a lower case Letter

     2.   is White space character

•    1.b is a lower case Letter

      2.  is White space character

• 1.a is a lower case Letter

      2.A is an upper case Letter

• 1.a is a lower case Letter

      2.b is a lower case Letter

What will be the output of the following Java code?

class output

    {

        public static void main(String args[])

        {

            String a = "hello i love java";

            System.out.println(a.indexOf('i')+" "+a.indexOf('o') +" "+a.lastIndexOf('i')+" "+a.lastIndexOf('o'));

        }

    }

• 6 4 6 9

• 5 4 5 9

• 7 8 8 9

• 4 3 6 9

What will be the output of the following Java code?

    class output

   {

   public static void main(String args[])

        {

           String c = "Hello i love java";

         int start = 2;

          int end = 9;

           char s[]=new char[end-start];

           c.getChars(start,end,s,0);

           System.out.println(s);

     }

    }

• Hello, i love java

• i love ja

• lo i lo

• llo i l

Which of these methods can be used to convert all characters in a String into a character array?

• charAt()

• both getChars() & charAt()

• both toCharArray() & getChars()

• all of the mentioned

What will be the output of the following Java program? 

    class string_class

    {

        public static void main(String args[])

        {

            String obj = "I LIKE JAVA";  

            System.out.println(obj.length);

        }

  

• 11

• 9

• 12

• Error

 Which of the following statements are incorrect?

• String is a class
  
  

• Strings in java are mutable

• Every string is an object of class String
  
  

• Java defines a peer class of String, called StringBuffer, which allows string to be altered

String in Java is a?

• class

• object

• variable

• Access Modifier

public class Main {

 

    

    public static void main(String args[])

    {       

        String str = "geekss@for@geekss";

        String[] arrOfStr = str.split("@", 2); 

        for (String a : arrOfStr)

            System.out.println(a);

    }

}

• geekss

  for@geekss

• geekss

  for

  geekss

• for@geekss

• geekss@for

  geekss

class Sample{

    public static void main(String args[])

    {

                String s = String.join(" < ", "Four", "Five", "Six", "Seven");  

        System.out.println(s);

    }

}

• a.both c & d

• b.Error

• c.Four >Five > Six > Seven

• d.Four < Five < Six < Seven