CLAD

[AustinPeter]

I am just after some answers for the CLAD online example test (not the fundamentals exam)

basicallly i just need confirming that i am answering the question fully.

1. for a machine chontrol application, the most appropriate choice fro th emechanical action of a STOP button would be:

a. switch when pressed

b. latch when pressed

c. Switch when released

d. latch when released

e. switch until releasd

I have answered a.  .. but would answer b not also be correct? ie two answers for this question?

1. for a windows based dialogs and UI's, the most appropriate choice fro th emechanical action of a STOP button would be:

a. switch when pressed

b. latch when pressed

c. Switch when released

d. latch when released

e. switch until releasd

i have answered d) but am guessing c) would also be correct? 

[battler]

The answer to the first question is only (b).

The answer to the second is (d).

[devchander]

Hi battler,

I always thought that for controlling a machine, switch would be an ideal option.

coz in 'latch when pressed', once released the boolean returns to its default level.

could you plz explain why  'latch when pressed' is the best option for machine control applications?

[tbob]

Questions like these should not be on any exam because:

(a) the NI answers could be based on subjective preferrence

(b) depending upon the exact application, another answer could be better.

Here is an answer based on preferences.  What if the user accidentally clicks a button, and realizes that is not what he wanted to do before he releases the button.  He could simply move the cursor off the button before releasing.  In this case, switch or latch when released is the best action.

The questions do not give enough information to make a valid decision.  The modes "when released" and "when pressed" are sometimes a subjective decision.  Sometimes it doesn't even matter.  These questions should be removed from the test and replaced with questions that test the user's knowledge of what the terms mean.

Message Edited by tbob on 01-30-2006 10:02 AM

[Ben]

Tbob wrote "These questions should be removed from the test and replaced with questions that test the user's knowledge of what the terms mean."

I agree 100% !

Ben

[devchander]

I second that reasoning!

Very true!