PHP Quiz (Set 3) - Upskilling Engineers

PHP (Set 3)

1 / 10

What is the purpose of the 'list()' construct in PHP?

To create an associative array

To assign values from an array to a list of variables

To remove elements from an array

To reverse the order of elements in an array

2 / 10

What is the purpose of the 'is_array()' function in PHP?

To check if a variable is a string

To check if a variable is a number

To check if a variable is an array

To check if a variable is empty

3 / 10

What is the purpose of the 'array_change_key_case()' function in PHP?

To change the case of array values to uppercase

To change the case of array keys to uppercase

To reverse the order of elements in an array

To remove duplicate values from an array

4 / 10

What is the purpose of the 'usort()' function in PHP?

To sort an array in descending order

To merge two arrays and remove duplicates

To remove duplicate values from an array

To sort an array in ascending order using a user-defined comparison function

5 / 10

What is the purpose of the 'range()' function in PHP?

To remove elements from an array

To reverse the order of elements in an array

To create a new array with a range of values

To sort the elements of an array

6 / 10

What is the purpose of the 'json_encode()' function in PHP?

To decode a JSON string into a PHP array

To encode a PHP array into a JSON string

To serialize a PHP array

To format a PHP array for printing

7 / 10

What is the purpose of the 'array_flip()' function in PHP?

To reverse the order of elements in an array

To swap keys and values in an associative array

To convert a numeric array into an associative array

To remove duplicate values from an array

8 / 10

What is the difference between 'array_merge()' and the '+' operator for arrays in PHP?

'array_merge()' can merge arrays with non-numeric keys, while the '+' operator cannot

'array_merge()' can only merge arrays with numeric keys, while the '+' operator can merge arrays with any keys

Both 'array_merge()' and the '+' operator can merge arrays with any keys

There is no difference; 'array_merge()' and the '+' operator are interchangeable

9 / 10

What is the purpose of the 'compact()' function in PHP?

To create a new array by combining two arrays

To create an array containing variables and their values

To remove duplicate values from an array

To reverse the order of elements in an array

10 / 10

What is the purpose of the 'array_map()' function in PHP?

To apply a callback function to each element of an array

To combine two arrays into a single array

To merge two arrays and remove duplicates

To reverse the order of elements in an array

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