Questions and answers for exam Preparation

MCQs

Total Questions : 16 | Page 1 of 2 pages

Question 1. PHP's numerically indexed array begin with position __.

1
2
0
-1

Discuss Question

Answer: Option C. -> 0

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

Question 2. Which of the functions is used to sort an array in descending order?

sort()
asort()
rsort()
dsort()

Discuss Question

Answer: Option C. -> rsort()

sort() function is used to sort in ascending order where as rsort() meaning reverse sort is used for sorting in descending order.

Question 3. What will be the output of the following php code?
< ?php
$states = array("karnataka" => array
( "population" => "11,35,000", "captial" => "Bangalore"),
"Tamil Nadu" => array( "population" => "17,90,000",
"captial" => "Chennai") );
echo $states["karnataka"]["population"];
?>

karnataka 11,35,000
11,35,000
population 11,35,000
karnataka population

Discuss Question

Answer: Option B. -> 11,35,000

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

Question 4. What will be the output of the following PHP code?
< ?php
$fruits = array ("mango", "apple", "pear", "peach");
$fruits = array_flip($fruits);
echo ($fruits[0]);
?>

mango
Error
peach
0

Discuss Question

Answer: Option B. -> Error

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

Question 5. Which of the following are correct ways of creating an array?(i) state[0] = "karnataka;(ii) $state[] = array("karnataka);(iii) $state[0] = "karnataka;(iv) $state = array("karnataka);

(iii) and (iv)
(ii) and (iii)
Only (i)
(ii), (iii) and (iv)

Discuss Question

Answer: Option A. -> (iii) and (iv)

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.

Question 6. Which function will return true if a variable is an array or false if it is not?

this_array()
is_array()
do_array()
in_array()

Discuss Question

Answer: Option B. -> is_array()

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

Question 7. What will be the output of the following PHP code?
< ?php
$fruits = array ("apple", "orange", "banana");
echo (next($fruits));
echo (next($fruits));
?>

orangebanana
appleorange
orangeorange
appleapple

Discuss Question

Answer: Option A. -> orangebanana

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

Question 8. Which function can be used to move the pointer to the previous array position?

last()
before()
prev()
previous()

Discuss Question

Answer: Option C. -> prev()

prev()

Question 9. What will be the output of the following PHP code?
< ?php
$state = array ("Karnataka", "Goa", "Tamil Nadu",
"Andhra Pradesh");
echo (array_search ("Tamil Nadu", $state) );
?>