String in Java - Quiz

Q: 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

Correct Option: B
Remarks:

Explanation: hellow9

Q: 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

Correct Option: D
Remarks:

Explanation: true true

Q: 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

Correct Option: B
Remarks:

Explanation: Hellow

Q: What will be the output?

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

A. abc
B. bc
C. bcd
D. abcd

Correct Option: B
Remarks:

Explanation: bc

Q: 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

Correct Option: C
Remarks:

Explanation: onetwo

Q: 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

Correct Option: C
Remarks:

Explanation: 3

Q: 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

Correct Option: A
Remarks:

Explanation: abc

Q:

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

Correct Option: B
Remarks:

Explanation: All characters k are replaced by a.

Q: 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

Correct Option: A
Remarks:

Explanation: S1=123456, S2=579

Q: 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.

Correct Option: A
Remarks:

Explanation: one.two.three.

String in Java - Quiz

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); } }

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); } }

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

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)); } }

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

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); } }

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

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

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. }

String in Java - Quiz

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); } }

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); } }

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

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)); } }

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

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); } }

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

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

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. }

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); } }

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); } }

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

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)); } }

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

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); } }

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

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

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. }