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200-500 – Zend PHP 5 Certification

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Showing 10–12 of 15 questions

Question 10 (Volume D)

Which technique should be used to speed up joins without changing their results?

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    Add indices on joined columns

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    Add a WHERE clause

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    Add a LIMIT clause

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    Use an inner join


Question 11 (Volume D)

PHP's array functions such as array_values() and array_key_exists() can be used on an object if the object...

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    implements Traversable

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    is an instance of ArrayObject

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    implements ArrayAccess

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    None of the above


Question 12 (Volume B)

Which of the following did not result in an output error in PHP 4 but does in PHP 5?

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    Using 'var' as an access modifier.

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    Assigning a new object instance to $this in a constructor.

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    Passing an object by-reference.

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    Passing an object by-value.