Questions and answers for exam Preparation

MCQs

Total Questions : 53 | Page 3 of 6 pages

Question 21. What will be the output of the following PHP code ?$a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow");$a2 = array("e" => "red","f" => "green", "g" => "blue");$result = array_intersect($a1, $a2);print_r($result);

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

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Answer: Option D. -> Array ( [a] => red [b] => green [c] => blue )

Question 22. What will be the output of the following PHP code ?$a = array(12, 5, 2);echo(array_product($a));

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Answer: Option D. -> 120

Question 23. What will be the output of the following PHP code ?$city_west = array("NYC", "London");$city_east = array("Mumbai", "Beijing");print_r(array_replace($city_west, $city_east));

Array ( [1] => NYC [0] => London )
Array ( [0] => Mumbai [1] => Beijing )
Array ( [0] => NYC [1] => London )
Array ( [1] => Mumbai [0] => Beijing )

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Answer: Option B. -> Array ( [0] => Mumbai [1] => Beijing )

Question 24. What will be the output of the following PHP code ?$a = array("a" => "Jaguar", "b" => "Land Rover", "c" => "Audi", "d" => "Maseratti");echo array_search("Audi", $a);

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Answer: Option A. -> c

Question 25. What will be the output of the following PHP code ?$people = array("Peter", "Susan", "Edmund", "Lucy");echo pos($people);

Edmund
Susan
Peter
Lucy

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Answer: Option C. -> Peter

Question 26. What will be the output of the following PHP code ?$number = range(0, 5);print_r ($number);

Array ( [0] => 0 [5] => 5 )
Array ( [0] => 0 [1] => 0 [2] => 0 [3] => 0 [4] => 0 [5] => 0 )
Array ( [0] => 5 [1] => 5 [2] => 5 [3] => 5 [4] => 5 [5] => 5 )
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 )

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Answer: Option D. -> Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 )

Question 27. What will be the output of the following PHP code?$fname = array("Peter", "Ben", "Joe");$age = array("35", "37", "43");$c = array_combine($fname, $age);print_r($c);

Array ( Peter Ben Joe )
Array ( “[Peter] => 35” “[Ben] => 37” “[Joe] => 43” )
Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )
Array ( 35 37 43 )

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Answer: Option C. -> Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )

Question 28. What will be the output of the following PHP code?$cars = array("Volvo", "BMW", "Toyota", "Honda", "Mercedes", "Opel");print_r(array_chunk($cars, 2));

Array ( [0] => Array ( [0] => Volvo [1] => BMW ) [1] => Array ( [0] => Toyota [1] => Honda ) [2] => Array ( [0] => Mercedes [1] => Opel ) )
Array ( [0] => Array ( [1] => Volvo [2] => BMW ) [1] => Array ( [1] => Toyota [2] => Honda ) [2] => Array ( [1] => Mercedes [2] => Opel ) )
Array ( [1] => Array ( [1] => Volvo [2] => BMW ) [2] => Array ( [1] => Toyota [2] => Honda ) [3] => Array ( [1] => Mercedes [2] => Opel ) )
Array ( [0] => Array ( [0] => Volvo [1] => Volvo ) [1] => Array ( [0] => BMW [1] => BMW ) [2] => Array ( [0] => Toyota [1] => Toyota ) )

Discuss Question

Answer: Option A. -> Array ( [0] => Array ( [0] => Volvo [1] => BMW ) [1] => Array ( [0] => Toyota [1] => Honda ) [2] => Array ( [0] => Mercedes [1] => Opel ) )

Question 29. What will be the output of the following PHP code?$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");print_r(array_change_key_case($age, CASE_UPPER));

Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )
Array ( [PeTeR] => 35 [BeN] => 37 [Joe] => 43 )
Array ( [peter] => 35 [ben] => 37 [joe] => 43 )
Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )

Discuss Question

Answer: Option A. -> Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )

Question 30. What will be the output of the following PHP code ?$array = array("red", "green");array_push($array, "blue", "yellow");print_r($array);