Assertion

[bobby chaurasia]

I came across this interesting question on assertion which I though I'd share with you all

public class TernaryAssertion {
  public static void assertBounds(int low, int high, int value) {
    assert value > low ? value < high : false
: value < high ? "too low" : "too high";
  }
  public static void main(String[] args) {
    assertBounds(100, 200, 150);
  }
}

Select the one correct answer.
(a) The compilation fails, because the method name assertBounds cannot begin
with the keyword assert.
(b) The compilation fails because the assert statement is invalid.
(c) The compilation succeeds and the execution runs without errors.
(d) The compilation succeeds and an AssertionError with the error message �too
low� is thrown.
(e) The compilation succeeds and an AssertionError with the error message �too
high� is thrown.
The correct answer is c.
The way I attacked it was :
assertion syntax : assert boolean expression : message
step1 : Regroup
assert ((value > low) ? (value < high) : false )
: (value < high ? "too low" : "too high");
Step 2 : Equate for low = 100, high = 200, value = 150
assert (true ? true:false) : ( true ? "Too low" : "too high" )
which is equivalent
assert true : "Too low"
The assert statement rightly asserts that 150 is greater than 200.

BTW I'll appreciate any information on mock exams on assertion.
Cheers

[ Jess added UBB [code] tags to preserve whitespace, check 'em out! ]
[ January 08, 2003: Message edited by: Jessica Sant ]

[Jessica Sant]

Dan Chischolm has a bunch of topic mock exams, including assertions.

[bobby chaurasia]

Jessica, I've been taking Dans exams but I believe assertion is not covered because in the tests by topics there is nothing that deals with assertion.
Thanks !

[John Paverd]

Originally posted by bobby chaurasia:
Jessica, I've been taking Dans exams but I believe assertion is not covered because in the tests by topics there is nothing that deals with assertion.
Thanks !

Dan's assertion test 1

[Valentin Crettaz]

Some assertion resources:
http://www.coderanch.com/t/239754/java-programmer-SCJP/certification/Notes-Assertions
http://www.coderanch.com/t/239625/java-programmer-SCJP/certification/study-material-ASSERTIONS