The San Francisco PHP Meetup Group

Re: [php-139] Test

From:	Logan Bailey
Sent on:	Wednesday, September 16, 2009 6:52 AM

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

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