Arrays — Part 2 MCQs with Explanations

prev() is the correct answer to “Which function can be used to move the pointer to the previous array position”. This question is standard in competitive examination syllabi for Arrays.

array_count_values() is the correct answer to “Which function returns an array consisting of associative key/value pairs”. This question is standard in competitive examination syllabi for Arrays.

Integer, string is the correct answer to “Array values are keyed by ______ values (called indexed arrays) or using ______ values (called associative arrays). Of course, these key methods can be combined as well.”. This question is standard in competitive examination syllabi for Arrays.

78 is the correct answer to “What will the following script output? <?php $array = array (1, 2, 3, 5, 8, 13, 21, 34, 55); $sum = 0; for ($i = 0; $i < 5; $i++) { $sum += $array[$array[$i]]; } echo $sum; ?>”. This question is standard in competitive examination syllabi for Arrays.

It will output NULL is the correct answer to “What elements will the following script output? <?php $array = array ( true => 'a', 1 => 'b' ) ; var_dump ( $array ) ; ?>”. This question is standard in competitive examination syllabi for Arrays.

array_key_exists() is the correct answer to “Which array function checks if the specified key exists in the array”. This question is standard in competitive examination syllabi for Arrays.

Numeric array, Associative array, Multidimensional array is the correct answer to “There are three different kind of arrays:”. This question is standard in competitive examination syllabi for Arrays.

No is the correct answer to “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”. This question is standard in competitive examination syllabi for Arrays.

asort() is the correct answer to “Assume you would like to sort an array in ascending order by value while preserving key associations. Which of the following PHP sorting functions would you use”. This question is standard in competitive examination syllabi for Arrays.

array_diff is the correct answer to “What function computes the difference of arrays”. This question is standard in competitive examination syllabi for Arrays.

Option 1 and 2 is the correct answer to “What functions count elements in an array? 1. count 2. Sizeof 3. Array_Count 4. Count_array”. This question is standard in competitive examination syllabi for Arrays.

An array with properties of that object as the array's elements is the correct answer to “What array will you get if you convert an object to an array”. This question is standard in competitive examination syllabi for Arrays.