File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Mock Exam Errata and the fly likes errata or ?? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Certification » Mock Exam Errata
Bookmark "errata or ??" Watch "errata or ??" New topic

errata or ??

R K Singh
Ranch Hand

Joined: Oct 15, 2001
Posts: 5382
que is from :
6) Which of the following are acceptable?
[check bixes are there - RK]
Object o = new Button("A");
Frame f = new Panel();
Boolean flag = true; // 3
Boolean flag = true; // 4
Panel p = new Applet();

My prob is that ... I can not distinguish the diffrence betn 3 & 4 ...
is it same with every one ...
is it errata

"Thanks to Indian media who has over the period of time swiped out intellectual taste from mass Indian population." - Chetan Parekh
Valentin Crettaz
Gold Digger

Joined: Aug 26, 2001
Posts: 7610
yeah I think it is an errata... Typical cut-paste problem...
I'm moving this to Mock Exam Errata

[Blog] [Blogroll] [My Reviews] My Linked In
Moya Green
Ranch Hand

Joined: Jan 24, 2002
Posts: 49
I met the same question in John Hunt Mock exam. Could anyone explain to me why
Boolean flag = true; // 3
is not acceptable? Thanks a lot!
Valentin Crettaz
Gold Digger

Joined: Aug 26, 2001
Posts: 7610
Boolean flag = true
tries to assign the boolean literal true to a reference variable of type Boolean (which is a class)...
boolean flag = true
Boolean flag = new Boolean("true")
Boolean flag = new Boolean(true)
are valid statements.
I agree. Here's the link:
subject: errata or ??
jQuery in Action, 3rd edition