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String in Java

⛪ Programming Language > Java Programming Language

Assess your understanding of Java Strings with these multiple choice questions. Learn about the different operations and methods for manipulating strings in Java and become a proficient Java developer. Take the quiz now! ➲ String in Java - Quiz

Q 1: What could be the 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);
        } 
}

A Throws an exception as string and int are not compatible for addition
B hellow9
C 9hellow
D Compilation error

Q 2: 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));
        }
}

A true
B false
C 0
D Compilation error

Q 3: 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); 
        }
}

A false true
B false false
C true false
D true true

Q 4: 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);
        }
}

A true
B false
C 0
D 1

Q 5: 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);
	}
}

A Hello
B Hellow
C Compilation error
D Throws an exception

Q 6: toString() method is defined in

A java.lang.String
B java.lang.Object
C java.lang.util
D None of these

Q 7: The String method compareTo() returns

A true
B false
C an int value
D 1

Q 8: What will be the output?

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

A abc
B bc
C bcd
D abcd

Q 9: What is the output of the following println statement?

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

A true
B false
C 1
D -1

Q 10: 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));
        }
}

A one
B two
C onetwo
D twoone

Q 11: How many Constructor String class have?

A 2
B 7
C 13
D None of this

Q 12: How many objects will be created?

String a = new String("Atnylagk");
String b = new String("Atnylagk");
String c = "Atnylagk";
String d = "Atnylagk";

A 4
B 3
C 2
D None of this

Q 13: What will be the output?

public class Test{ 
        public static void main (String[] args){ 
		String test = "a1b2c3"; 
                String[] tokens = test.split("\\d"); 
                for(String s: tokens) 
                        System.out.print(s); 
	} 
}

A abc
B 123
C Runtime exception thrown
D Compilation error

Q 14: The class string belongs to ................. package.

A java.awt
B java.lang
C java.applet
D java.string

Q 15:

String str1 = "Kolkata".replace('k', 'a');

In the above statement, the effect on string Kolkata is

A The first occurrence of k is replaced by a.
B All characters k are replaced by a.
C All characters a are replaced by k.
D Displays error message

Q 16: What will be output?

String S1 = "S1 ="+ "123"+"456";
String S2 = "S2 ="+(123+456);

A S1=123456, S2=579
B S1=123456,S2=123456
C S1=579,S2=579
D None of This

Q 17: What will be the output of the following program code?

public class Test{
      public static void main(String args[]){
            String s = "what";
            StringBuffer sb = new StringBuffer("what");
            System.out.print(sb.equals(s)+","+s.equals(sb));
      }
}

A true,true
B false,true
C true,false
D false,false

Q 18: What will be the output?

1. public class Test{
2.      public static void main(String args[]){
3.            Object myObj = new String[]{"one", "two", "three"};
4.            {
5.	          for(String s : (String[])myObj) 
6.		        System.out.print(s + ".");
7.	    }
8.      }
9. }

A one.two.three.
B Compilation fails because of an error at line 3
C Compilation fails because of an error at line 5
D An exception is thrown at runtime.

Q 19: Determine output:

public class Test{
      public static void main(String args[]){
            String str = null;
            if(str.length() == 0){
                  System.out.print("1");
            }
            else if(str == null){
                  System.out.print("2");
            }
            else{
                  System.out.print("3");
            }
      }
}

A Compilation fails.
B "1" is printed.
C "2" is printed.
D An exception is thrown at runtime.

String in Java

⛪ Programming Language > Java Programming Language

Q 1: What could be the 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); } }

Q 2: 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)); } }

Q 3: 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); } }

Q 4: 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); } }

Q 5: 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); } }

Q 6: toString() method is defined in

Q 7: The String method compareTo() returns

Q 8: What will be the output?
String str1 = "abcde"; System.out.println(str1.substring(1, 3));

Q 9: What is the output of the following println statement?
String str1 = "Hellow"; System.out.println(str1.indexOf('t'));

Q 10: 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)); } }

Q 11: How many Constructor String class have?

Q 12: How many objects will be created?
String a = new String("Atnylagk"); String b = new String("Atnylagk"); String c = "Atnylagk"; String d = "Atnylagk";

Q 13: What will be the output?
public class Test{ public static void main (String[] args){ String test = "a1b2c3"; String[] tokens = test.split("\\d"); for(String s: tokens) System.out.print(s); } }

Q 14: The class string belongs to ................. package.

Q 15:
String str1 = "Kolkata".replace('k', 'a');
In the above statement, the effect on string Kolkata is

Q 16: What will be output?
String S1 = "S1 ="+ "123"+"456"; String S2 = "S2 ="+(123+456);

Q 17: What will be the output of the following program code?
public class Test{ public static void main(String args[]){ String s = "what"; StringBuffer sb = new StringBuffer("what"); System.out.print(sb.equals(s)+","+s.equals(sb)); } }

Q 18: What will be the output?
1. public class Test{ 2. public static void main(String args[]){ 3. Object myObj = new String[]{"one", "two", "three"}; 4. { 5. for(String s : (String[])myObj) 6. System.out.print(s + "."); 7. } 8. } 9. }

Q 19: Determine output:
public class Test{ public static void main(String args[]){ String str = null; if(str.length() == 0){ System.out.print("1"); } else if(str == null){ System.out.print("2"); } else{ System.out.print("3"); } } }