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Download WorksheetWho Calls main() function in C/JAVA Programming language?
Java Compiler
2.Java Runtime Environment
3.Operating System
4.Java Virtual Machine
5.None
What is the output?
public class Test {
public static String out ="";
public static void chk(int i) {
try {
if(i==1) {
throw new Exception();
}
out += "A";
}
catch(Exception e) {
out += "D";
return;
}
finally {
out += "B";
}
out += "C";
}
public static void main (String [] args) {
chk(0);
chk(1);
System.out.println(out);
}
}
DBCAB
2.ADBCDB
3.ABCD
4.ABCDB
when constructor will be called
By calling method
2.by creating object of that class
Iterator cursor is having both directional movements?
Is Vector thread safe ?
in which collection in java insertion order preserved ?
Arraylist
2.Linkedlist
3.Vector
4.Stack
ArrayList implements Random Access interface.
public class Exercise {
public static void main(String[] args) {
double x = 4.0 - 3.10;
//System.out.println(x);
System.out.println(x == 0.90);
}
}
class demo{ int a, b; demo() { a = 10; b = 20; } public void print() { System.out.println ("a = " + a + " b = " + b + "\n"); }}class Test{ public static void main(String[] args) { demo obj1 = new demo(); demo obj2 = obj1; obj1.a += 1; obj1.b += 1; System.out.println ("values of obj1 : "); obj1.print(); System.out.println ("values of obj2 : "); obj2.print(); }}values of obj1 :
a=11,b=21
values of obj2:
a=11 b=21
2.values of obj1 :
a=11,b=21
values of obj2:
a=10 b=20
3.compiler error
4.runtim error
Predict the output of following Java program
class Test { int i;} class Main { public static void main(String args[]) { Test t = new Test(); System.out.println(t.i); } } |
|
garbage value
|
|
0
|
compiler error
4.runtime error
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