bruce

these are bitwise operators

& and,  ! or, ~ not, ^ exclusive or...xor, << left shift, >> right shift.

ez

-----Original Message-----
From: Logan Bailey
Sent: Sep 16, 2009 9:53 AM
To: [address removed]
Subject: Re: [php-139] Test

1. 3 & 5 is 11 & 101 which is 1;

2. If either of the array is empty, $a & $b === false.

3. ^ = xor.  Lots of fun, 3 ^ 5= 11 ^ 101 === 110;  Meaning the two compared bits have to be oposites. so 11 ^ 101 is 011 ^ 101 Then you look for non matching bits and you get 110 or 6;

4./5. YOu can easily figure out for youself using php Though they are

1.2345E+14

0.12345

respectively.  E just signifies scientific notation N * 10 ^m

6.  I believe hte correct syntax is

<script type="php"

Obviously the first one is not the answer as it will throw an error.

8.  Push and POP always work off the end of a stack(array).  that is why there is array_shift to get the variable off the front of the array.

On Sep 15, 2009, at 10:11 PM, Bruce Razban wrote:

Dear php-139ers!

 

I am working on getting Php5 Certification.

 

When I took the test, I was somewhat surprised by the following questions. I know that these only show in test and not in actual coding in the real world. But, here we go with the test:

 

1. We have $A and $B and their values are:  A is 3 and B is 5. Then they ask what is $A & $B?   I thought that this is bit-wise "AND" function, but, the answer of 3 did not work. Is there a single & and is it the logical and?

2. On question 1 above, suppose A and B are arrays, then what will A & B be?  (I am relying on my memory for this)

 

3. What if the function of ^ operator?   For example A^B? A and B could be variables, of arrays (Ofcourse with the $ in front of them)?

4. What is the value in decimal of number 12345E10?

5. What is the value in decimal of number 12345E -5?
6. Which of the following statements will work on any installation of PHP?

        <?

        ?>       or,

 

        <? Language=PHP5.2 ....

 

        ?>         //Sorry I am not sure about the exact syntax here.

 

7.  For Array A that contains (2, 3, 4, 5, 6, 7)  what does shift 2 do? What does shift -3 do?

 

8. And a general question:  On the push and pop instruction for an array how do we know which end (left of right) is to be considered?

 

I appreciate it if anyone can answer these.

 

Thanks.

 

-Bruce

 

--
Please Note: If you hit "REPLY", your message will be sent to everyone on this mailing list ([address removed])
This message was sent by Bruce Razban ([address removed]) from The San Francisco PHP Meetup Group.
To learn more about Bruce Razban, visit his/her member profile
To unsubscribe or to update your mailing list settings, click here

Meetup Support: [address removed]
632 Broadway, New York, NY 10012 USA

--
Please Note: If you hit "REPLY", your message will be sent to everyone on this mailing list ([address removed])
This message was sent by Logan Bailey ([address removed]) from The San Francisco PHP Meetup Group.
To learn more about Logan Bailey, visit his/her member profile
To unsubscribe or to update your mailing list settings, click here

Meetup Support: [address removed]
632 Broadway, New York, NY 10012 USA