PHP ARRAYS QUIZ | EXAMIANS

Which function returns an array consisting of associative key/value pairs?

count()

array_count()

count_values()

array_count_values()

TRUE ANSWER : ?
YOUR ANSWER : ?

There are three different kind of arrays:

Const array, Associative array, Multidimensional array

Numeric array, Associative array, Dimensional array

Numeric array, Associative array, Multidimensional array

Numeric array, String array, Multidimensional array

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code ? $a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow"); $result = array_flip($a1); print_r($result);

Array ( [a] => red [b] => green [c] => blue [d] => yellow )

Array ( [red] => red [green] => green [blue] => blue [yellow] => yellow )

Array ( [red] => a [green] => b [blue] => c [yellow] => d )

Array ( [a] => a [b] => b [c] => c [d] => d )

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $place = array("NYC", "LA", "Paris"); array_pop($place); $place1 = array("Paris"); $place = array_merge($place, $place1); print_r($place);

None of the mentioned

Array ( [0] => LA [1] => Paris [2] => Paris )

Array ( [0] => NYC [1] => LA [2] => Paris)

Array ( [0] => NYC [1] => LA [2] => Paris [3] => Paris )

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $cars = array("Volvo", "BMW", "Toyota"); echo "I like " . $cars[2] . ", " . $cars[1] . " and " . $cars[0] . ".";

I like Volvo, Toyota and BMW

I like BMW, Volvo and Toyota

I like Volvo, BMW and Toyota

I like Toyota, BMW and Volvo

TRUE ANSWER : ?
YOUR ANSWER : ?

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?

Yes, because the interpreter must always create a copy of the array before passing it to the function.

Yes, but only if the array is large.

Yes, but only if the function modifies the contents of the array.

Yes, because PHP must monitor the execution of the function to determine if changes are made to the array.

No

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $fruits = array ("apple", "mango", "peach", "pear", "orange"); $subset = array_splice ($fruits, 2); print_r ($fruits);

Array ( [0] => pear [1] => orange )

Array ( [0] => apple [1] => mango )

Error

Array ( [0] => apple [1] => mango [2] => peach )

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $a=array("A","Cat","Dog","A","Dog"); $b=array("A","A","Cat","A","Tiger"); $c=array_combine($a,$b); print_r(array_count_values($c));

Array ( [A] => 2 [Cat] => 1 [Dog] => 4 [Tiger] => 1 )

Array ( [A] => 2 [Cat] => 2 [Dog] => 1 [Tiger] => 1 )

Array ( [A] => 5 [Cat] => 2 [Dog] => 2 [Tiger] => 1 )

Array ( [A] => 6 [Cat] => 1 [Dog] => 2 [Tiger] => 1 )

TRUE ANSWER : ?
YOUR ANSWER : ?

Which function can be used to move the pointer to the previous array position?

prev()

previous()

last()

before()

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $names = array("Sam", "Bob", "Jack"); echo $names[0] . "is the brother of " . $names[1] . " and " . $names[1] . ".".$brother;

$brother

Sam is the brother of Bob and Bob) $brother

Sam is the brother of Bob and Bob)

Error

TRUE ANSWER : ?
YOUR ANSWER : ?

Which function returns an array consisting of associative key/value pairs?

There are three different kind of arrays:

What will be the output of the following PHP code ?<br/>$a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow");<br/>$result = array_flip($a1);<br/>print_r($result);

What will be the output of the following PHP code?<br/>$place = array("NYC", "LA", "Paris");<br/>array_pop($place);<br/>$place1 = array("Paris");<br/>$place = array_merge($place, $place1);<br/>print_r($place);

What will be the output of the following PHP code?<br/>$cars = array("Volvo", "BMW", "Toyota");<br/>echo "I like " . $cars[2] . ", " . $cars[1] . " and " . $cars[0] . ".";

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?

What will be the output of the following PHP code?<br/>$fruits = array ("apple", "mango", "peach", "pear", "orange");<br/>$subset = array_splice ($fruits, 2);<br/>print_r ($fruits);

What will be the output of the following PHP code?<br/>$a=array("A","Cat","Dog","A","Dog");<br/>$b=array("A","A","Cat","A","Tiger");<br/>$c=array_combine($a,$b);<br/>print_r(array_count_values($c));

Which function can be used to move the pointer to the previous array position?

What will be the output of the following PHP code?<br/>$names = array("Sam", "Bob", "Jack");<br/>echo $names[0] . "is the brother of " . $names[1] . " and " . $names[1] . ".".$brother;