Arrays — Part 1 MCQs with Explanations

Like many programming languages, the first element of an array has an index value of 0.

A variable name should start with $ symbol which is not present in i) and you need not put the square brackets when you use the array() constructor.

Treat states as a multidimensional array and accordingly traverse it to get the value.

A built-in function, is_array(), is available for testing an array. Its prototype follows: boolean is_array(mixed variable).

array_push adds a value to the end of an array, returning the total count of elementsin the array after the new value has been added.

The array_search() function searches an array for a specified value, returning its key if located and FALSE otherwise.

The next() function returns the array value residing at the position immediately following that of the current array pointer.

The array entity holding pear and mango is counted as an item, just as its contents are.

The order of elements defined.

Here “keys” array is $age and “values” array is $fname.

The array_count_values() function counts all the values of an array and array_combine() combines arrays.

The array_diff() function compares the values of two (or more) arrays, and returns the differences.

Basic combined application of array_combine() and array_merge().

Simple definition of array and using it in a string. We have used $names[1] twice and hence Bob appears twice.

$brother undeclared.

array_merge() and array_pop() yields that result.

The array_change_key_case() function changes all keys in an array to lowercase or uppercase and arry_pop() removes last element

The array_flip() function flips/exchanges all keys with their associated values in an array.

The array_intersect() function compares the values of two (or more) arrays, and returns the matches.

The array_product() function calculates and returns the product of an array.

The array_search() function searches for the element and returns the key of that element.

The array_replace() function replaces the values of the first array with the values from following arrays

The pos() function returns the value of the current element in an array, and since no operation has been done, the current element is the first element.

The range() function creates an array containing a range of elements.

The array_push() function inserts one or more elements to the end of an array.

The array_chunk() function splits an array into chunks of new arrays.

The array_combine() function creates an array by using the elements from one “keys” array and one “values” array.

The array_count_values() function counts all the values of an array.

The array_diff() function compares the values of two (or more) arrays, and returns the differences.

The array_merge() function merges one or more arrays into one array.

The array_shift() function removes the first element from an array, and returns the value of the removed element.

The array_pop() function deletes the last element of an array.

As we are flipping the values, $fruits[“mango”] = 0, $fruits[“apple”] = 1 and so on.

The function asort() sorts the array in ascending order, except that the key/value corresponding is maintained.

While sorting each character is compared with the others and sorted using ascii values therefore we the sorted array to be like option c.

The resulting array will begin with the first input array parameter, appending each subsequent array parameter in the order of appearance.

The array_slice() function returns a section of an array based on a starting and ending offset value.

The array_splice() function removes all elements of an array found within a specified range.

The array_sum() function add all the values of the input array together, returning the final sum. If a string datatype is found, it’ll be ignored.

The array_intersect() function returns a key preserved array consisting only of those values present in the first array that are also present in each of the other input arrays.