According to HTTP standard. Please answer which port number is reserved for HTTPS protocol by default

Which SQL statement is used to return only different values?

The following tables are present in database: users and orders. The dump of these tables are given on the image

Based on these dumps please answer for the question

How many records will shown after next query execution:

SELECT users.user_firstname, users.user_lastname, orders.order_title FROM users

LEFT JOIN orders ON users.user_id = orders.user_id

Which SQL statement is used to extract data from a database?

Please answer to the question What are the basics concepts of Object-Oriented Programming

What selectors can set green background for second inner div in next markup?

<div class = "outer">

CSS selector which selects every <p> element that has no children

How to select multiple elements?

How do you display a border like this:

There is an HTML code to create To Do list:

Assume we have created listItem variable that holds element li to which we need to insert checkbox with label of an To Do item.

Please choose correct fragment of code to do this task.