Arrays MCQ

Test your knowledge with important Arrays MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Arrays MCQs on Bissoy. Bissoy App

• What array will you get if you convert an object to an array?
  ক

  An array with properties of that object as the array's elements

  খ

  An array with properties of that array as the object's elements

  গ

  An array with properties of that object as the Key elements

  ঘ

  An array with keys of that object as the array's elements
• What functions count elements in an array?<br>1. count<br>2. Sizeof<br>3. Array_Count<br>4. Count_array<br>
  ক

  Option 2 and 4

  খ

  Option 1 and 2

  গ

  Option 3 and 4

  ঘ

  Option 1 and 4
• What function computes the difference of arrays?
  ক

  array_diff

  খ

  diff_array

  গ

  arrays_diff

  ঘ

  diff_arrays
• Assume you would like to sort an array in ascending order by value while preserving key associations. Which of the following PHP sorting functions would you use?
  ক

  ksort()

  খ

  asort()

  গ

  krsort()

  ঘ

  sort()

  ঙ

  usort()
• 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?
  ক

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

  খ

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

  গ

  Yes, but only if the array is large.

  ঘ

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

  ঙ

  No
• There are three different kind of arrays:
  ক

  Numeric array, String array, Multidimensional array

  খ

  Numeric array, Associative array, Dimensional array

  গ

  Numeric array, Associative array, Multidimensional array

  ঘ

  Const array, Associative array, Multidimensional array
• Which array function checks if the specified key exists in the array?
  ক

  array_key_exist()

  খ

  array_key_exists()

  গ

  array_keys_exists()

  ঘ

  arrays_key_exists()
• What will the following script output?<br>&lt;?php<br>$array = array (1, 2, 3, 5, 8, 13, 21, 34, 55);<br>$sum = 0;<br>for ($i = 0; $i $sum += $array[$array[$i
  ক

  ;<br>}<br>echo $sum;<br>?&gt;

  খ

  <p><span>A.</span> 78

  গ

  </span> 19
• Array values are keyed by ______ values (called indexed arrays) or using ______ values (called associative arrays). Of course, these key methods can be combined as well.
  ক

  Float, string

  খ

  Positive number, negative number

  গ

  Even number, string

  ঘ

  String, Boolean

  ঙ

  Integer, string
• Which function can be used to move the pointer to the previous array position?
  ক

  last()

  খ

  before()

  গ

  prev()

  ঘ

  previous()
• Which function will return true if a variable is an array or false if it is not?
  ক

  this_array()

  খ

  is_array()

  গ

  do_array()

  ঘ

  in_array()
• PHP’s numerically indexed array begin with position ______.
  ক

  1

  খ

  2

  গ

  0

  ঘ

  -1
• Each element in an array has an index and the starting index is index 1.
  ক

  True

  খ

  False
• Arrays can be used to store multiple values in one single variable.
  ক

  True

  খ

  False
• Which function should we use to sort the array in natural order?
  ক

  dsort()

  খ

  casesort()

  গ

  natcasesort()

  ঘ

  naturalsort()
• Which of the functions is used to sort an array in descending order?
  ক

  sort()

  খ

  asort()

  গ

  rsort()

  ঘ

  dsort()
• Which of the following gives the memory address of the first element in array? ; b) array; c) array(2); d) array;
  ক

  array;

  খ

  0

  গ

  0

  ঘ

  0
• Which of the following accesses the seventh element stored in array? ; b) array; c) array(7); d) array;
  ক

  array;

  খ

  6

  গ

  6

  ঘ

  6
• What is the correct definition of an array?
  ক

  An array is a series of elements of the same type in contiguous memory locations

  খ

  An array is a series of element

  গ

  An array is a series of elements of the same type placed in non-contiguous memory locations

  ঘ

  An array is an element of the different type
• What is the index number of the last element of an array with 9 elements?
  ক

  9

  খ

  8

  গ

  0

  ঘ

  Programmer-defined