Welcome to your Java MCQ Test
1.
What is file handling in java?
2.
What will be the output of following Java code?
public class Main {
public static void main(String[] args) {
String str = "Hello";
str = "Bye";
System.out.println(str);
}
}
3.
Can the Java program accept input from the command line?
4.
Which keyword in java is used for exception handling?
5.
What will be the output of following Java code?
import java.util.Scanner;
class ThisKeyword {
private int a = 4;
private int b = 1;
void getSum(int a, int b) {
this.a = a;
this.b = b;
System.out.println(this.a + this.b);
}
}
public class Main {
public static void main(String args[]) {
ThisKeyword T = new ThisKeyword();
T.getSum(3, 5);
}
}
6.
What is the result of 10 + 20 + "Java" in Java?
7.
What will be the output of following Java code?
import java.util.Scanner;
class ThisKeyword {
private int a = 4;
private int b = 1;
void getSum(int a, int b) {
this.a = a;
this.b = b;
System.out.println(this.a + this.b);
}
}
public class Main {
public static void main(String args[]) {
ThisKeyword T = new ThisKeyword();
T.getSum(3, 5);
}
}
8.
What is stringBuffer in java?
9.
Which method can be used to find the length of a string in Java?
10.
Static variables in java are declared as ___.
11.
Object in java are ___.
12.
Which of these is the correct method to create an array in java?
13.
Which of the following can be declared as final in java?
14.
Which method deletes a file in Java?
15.
What is the default value of a boolean variable in Java?
16.
Can we keep a different name for the java class name and java file name?
17.
Which of the following is a superclass of every class in Java?
18.
How can we access methods for file handling in java?
19.
What will be the output of following Java code?
public class Main {
public static void main(String arg[]) {
int i;
for (i = 1; i <= 12; i += 2) {
if (i == 8) {
System.out.println(i);
break;
}
}
}
}
20.
Which method in java is used to generate random numbers in Java?
