PHP MCQs - 10

What is the output of the following code snippet?

$x = 10;
$y = 3;
echo $x % $y;
 

• A) 3
• B) 1
• C) 0
• D) 2

Answer: B) 1

Which of the following PHP functions is used to calculate the square root of a number?

• A) sqrt()
• B) square_root()
• C) root()
• D) sqr()

Answer: A) sqrt()

What is the purpose of the array_keys() function in PHP?

• A) Returns all the values of an array
• B) Returns all the keys of an array
• C) Returns the number of elements in an array
• D) Reverses the order of elements in an array

Answer: B) Returns all the keys of an array

What is the output of the following code snippet?

$arr = [1, 2, 3, 4, 5];
echo array_sum($arr);

• A) 15
• B) 10
• C) 5
• D) Error

Answer: A) 15

Which of the following PHP functions is used to generate a unique ID?

• A) uniqid()
• B) unique_id()
• C) generate_id()
• D) random_id()

Answer: A) uniqid()

What is the output of the following code snippet?

$str = "Hello World!";
echo strtoupper($str);

• A) hello world!
• B) HELLO WORLD!
• C) Hello World!
• D) Error

Answer: B) HELLO WORLD!

Which of the following PHP functions is used to check if a variable is an array?

• A) is_array()
• B) array_check()
• C) check_array()
• D) verify_array()

Answer: A) is_array()

What is the purpose of the array_shift() function in PHP?

• A) Adds an element to the end of an array
• B) Removes the last element from an array
• C) Removes the first element from an array
• D) Adds an element to the beginning of an array

Answer: C) Removes the first element from an array

What is the output of the following code snippet?

$str = "Hello,World";
$arr = explode(",", $str);
print_r($arr);

• A) Hello World
• B) Hello, World
• C) Array ( [0] => Hello [1] => World )
• D) Error

Answer: C) Array ( [0] => Hello [1] => World )

Which of the following PHP functions is used to generate a random integer?

- A) random_int()

- B) rand()
- C) mt_rand()
- D) random()

**Answer: A) random_int()**