Explain public, private, protected functions and variables inside a class in PHP.

I'll define a variable as a property

Assuming there is a new field requiring a change on a content type. How do you ensure the changes apply in the next deployment?

There are a couple of ways to achieve this... depending on whether a custom module exists or not.  I'll focus on using Drush.

Replicate

Replicate the bug in your local environment.

Check

Check - do you have the latest version of the contrib module?  In case the issue has already been identified and resolved.

A quick check of the issue list for the contrib module.

Nothing.

2 or 3 approaches to build a homepage or landing page through Drupal

Please include any limitations & considerations of each approach

Building a homepage a few options to consider and should against a business case:

1. Article

An article – create a new node (assuming a least one content type exists), then using Basic Site Settings (admin > config > system), scroll down to Front Page and enter the node.nid value or alias.

Drupal cache is one of the major subsystems that deliver Drupal's flexibility for devs.  In a nutshell, Drupal cache is about speeding up the time to render a page to a user.  Vanish or similar pending server-side set-up makes caching more efficient.

Drupal modules - to name a few Internal Dynamic Page Cache, Internal Page Cache, System

git reset, git revert, and git cherry-pick are three Git commands used for different purposes related to managing your version control history. Here's a brief overview of each command:

git reset
git revert
git cherry-pick

Android Studio error

Android Studio error

error: package android.support.v4.content does not exist

This is a problem with plugins using old Android support dependencies instead of the AndroidX equivalent.  As it's a dependency issue, to resolve add jetifier.  I know yet another package...

Android Studio build errors

Build failed error: cannot find symbol if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)

or

cannot find symbol Build.VERSION.SDK_INT >= Build.VERSION_CODES.S &&

To resolve - upgrade the compileSdkVersion and targetSdkVersion to 31 in your grade file.  Note, this setting could be in one of the following files

Initialise your Capacitor config​

To initialise Capacitor use the CLI questionnaire:

npx cap init

On executing the above command, you will be prompted to answer a few questions for your app such as your app's name and the package ID.