SAP Interview Questions and Answers

mysqli_fetch_assoc() returns an associative array while mysqli_fetch_array() returns both numeric and associative arrays.

• mysqli_fetch_assoc() fetches a row from a result set as an associative array.

• mysqli_fetch_array() fetches a row from a result set as both an associative and numeric array.

• mysqli_fetch_assoc() is faster than mysqli_fetch_array() when fetching only associative arrays.

• mysqli_fetch_array() has an optional parameter to specify the type of array to return.

To call parent class constructor in derived class, use parent::__construct() method.

• Use parent::__construct() method in derived class constructor.

• Pass the required parameters to parent::__construct() method.

• This will call the parent class constructor and initialize the parent class properties.

The function to convert string to array is explode().

• The function takes two parameters: delimiter and string.

• The delimiter specifies where to break the string into array elements.

• The function returns an array of strings.

• Example: $str = 'apple,banana,orange'; $arr = explode(',', $str);

• This will result in an array with three elements: 'apple', 'banana', and 'orange'.

Front end is the user-facing part of a website, while back end is the behind-the-scenes part that handles data and functionality.

• Front end is responsible for the design, layout, and user experience of a website.

• Back end handles the server-side programming, database management, and server configuration.

• Front end technologies include HTML, CSS, and JavaScript, while back end technologies include PHP, Python, and Ruby on Rails.

There are three types of inheritance in PHP: single, multiple, and multilevel.

• Single inheritance involves a child class inheriting from a single parent class.

• Multiple inheritance involves a child class inheriting from multiple parent classes.

• Multilevel inheritance involves a child class inheriting from a parent class, which in turn inherits from another parent class.

• PHP only supports single inheritance natively, but multiple inheritance can be achieved using interfaces.

• Exampl...read more

Pseudo classes are used to define a special state of an element.

• Pseudo classes are preceded by a colon (:)

• They are used to style elements based on their state or position

• Examples include :hover, :active, :first-child, :nth-child