Explore topic-wise MCQs in Php.

This section includes 54 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.

51.

Absent any actual need for choosing one method over the other, does passing arrays by value to a read-only function reduce performance compared to passing them by reference?

A. Yes, because the interpreter must always create a copy of the array before passing it to the function.
B. Yes, but only if the function modifies the contents of the array.
C. Yes, but only if the array is large.
D. Yes, because PHP must monitor the execution of the function to determine if changes are made to the array.
E. No
Answer» F.
Discussion
52.

There are three different kind of arrays:

A. Numeric array, String array, Multidimensional array
B. Numeric array, Associative array, Dimensional array
C. Numeric array, Associative array, Multidimensional array
D. Const array, Associative array, Multidimensional array
Answer» D. Const array, Associative array, Multidimensional array
Discussion
53.

Which array function checks if the specified key exists in the array?

A. array_key_exist()
B. array_key_exists()
C. array_keys_exists()
D. arrays_key_exists()
Answer» C. array_keys_exists()
Discussion
54.

What elements will the following script output? 'a', 1 => 'b');var_dump ($array);?>

A. 1 => 'b'
B. True => 'a', 1 => 'b'
C. 0 => 'a', 1 => 'b'
D. None
E. It will output NULL
Answer» F.
Discussion