Impelsys Interview Questions, Process, and Tips

Design patterns are reusable solutions to common software development problems.

• Design patterns provide proven solutions to recurring problems in software development.

• They help in creating code that is more flexible, reusable, and maintainable.

• Some common design patterns include Singleton, Factory, Observer, and Decorator.

• Singleton pattern ensures that only one instance of a class is created.

• Factory pattern provides a w...read more

PHP program to print *(stars) in pyramid shape

• Use nested for loops to print the pyramid shape

• The outer loop controls the number of rows

• The inner loop controls the number of stars to print in each row

• Use a combination of spaces and stars to create the pyramid shape

To display an image from a database in a PHP view page, retrieve the image as a blob and output it with appropriate headers.

• Retrieve the image data from the database as a blob.

• Set the appropriate content-type header for the image format.

• Output the image data to the response body.

PHP program to sort array of strings

• Use the built-in sort() function

• Pass the array as argument to the sort() function

• Use the SORT_STRING flag to sort the array as strings