The text does not contain any specific questions that can be answered with yes or no as per your request. However, based on the context provided:

1. Yes, you can install Kali Linux on VirtualBox.

2. There are two main options for installing Kali Linux:

- Option 1: Using a pre-installed VirtualBox image provided by Kali.

- Option 2: Installing Kali Linux from scratch on VirtualBox yourself (this is more advanced).

3. The amount of RAM needed for a Kali VM (Virtual Machine) can vary depending on the specific use case and resources available, but generally speaking, at least 4GB or even higher are recommended.

In terms of what operating system you should install Kali Linux alongside in VirtualBox:

- There isn't really an advantage or disadvantage to installing it alongside any particular OS. However, some users might prefer running other lightweight distributions like Ubuntu or Mint for better performance due to reduced resource usage compared with heavier options such as Windows 10/8 etc.

If there's anything else I've missed please let me know and I'll be happy to help further!

Kali linux for virtualbox