What will be the output and why?

Question

public static void main(String args[])
{
int x=033;
System.out.println(x);
}

Answer 1

You can test-run the code in Playground for getting the output.

As for why; if an integral value be prefixed by a zero, it is assumed an octal value (base 8) instead of a decimal (base 10).

https://en.m.wikipedia.org/wiki/Numeral_system

33 in octal equals to 27 in decimal.