Strings
practice.

Which of the following is true about string concatenation in Java?

How do you find the index of the last occurrence of a substring in a string in Java?

In Java, what is the purpose of the endsWith() method of a String object?

What is the purpose of the toLowerCase() method of a String object in Java?

Which method is used to extract a substring from a string in Java?

In Java, what is the purpose of the isEmpty() method of a String object?

What is the result of the expression "Hello".toUpperCase().toLowerCase() in Java?

How do you check if a string contains a specific character in Java?

What is the purpose of the substring() method of a String object in Java?

How do you find the first index of a specified character in a string in Java?

The output of the following fraction of code is

public class Test{
        public static void main(String args[]){
	        String s1 = new String("Hello");
		String s2 = new String("Hellow");
		System.out.println(s1 = s2);
	}
}

What will be the output of the following program code?

class LogicalCompare{
        public static void main(String args[]){
                String str1 = new String("OKAY");
                String str2 = new String(str1);
                System.out.println(str1 == str2);
        }
}

What will be the output of the following program?

public class Test{
        public static void main(String args[]){
		String s1 = "java";
		String s2 = "java";
		System.out.println(s1.equals(s2));
		System.out.println(s1 == s2); 
        }
}

Determine output:

public class Test{
        public static void main(String args[]){ 	
		String s1 = "SITHA";
		String s2 = "RAMA";
		System.out.println(s1.charAt(0) > s2.charAt(0));
        }
}

What could be output of the following fragment of code?

public class Test{
        public static void main(String args[]){ 
		String x = "hellow";
		int y = 9;
		System.out.println(x += y);
        } 
}

toString() method is defined in

The String method compareTo() returns

What will be the output?

String str1 = "abcde";
System.out.println(str1.substring(1, 3));

What is the output of the following println statement?

String str1 = "Hellow";
System.out.println(str1.indexOf('t'));

What will be the output of the following program?

public class Test{
        public static void main(String args[]){
		String str1 = "one";
		String str2 = "two";
		System.out.println(str1.concat(str2));
        }
}