Zend Exam 200-710 Topic 2 Question 42 Discussion

Actual exam question for Zend's 200-710 exam

Question #: 42
Topic #: 2

[All 200-710 Questions]

What is the output of the following code?

class a

{

public $val;

}

function renderVal (a $a)

{

if ($a) {

echo $a->val;

}

renderVal (null);

AA syntax error in the function declaration line

BAn error, because null is not an instance of 'a'

CNothing, because a null value is being passed to renderVal()

DNULL

Show Suggested Answer

Suggested Answer: A

by Johnetta at Jan 05, 2023, 03:52 PM

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Colby

4 days ago

Hmm, I'm going with option D. The function is checking if the $a parameter is truthy, and null is a falsy value, so it should output NULL.

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Tanja

7 days ago

I'm pretty sure option B is the correct answer. Passing a null value to a function that expects an instance of a class will result in an error.

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Carman

15 days ago

I agree with Arlene, it should be an error.

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Arlene

18 days ago

I believe it's an error, because null is not an instance of 'a'.

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Kaitlyn

21 days ago

I think the output is NULL.

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