Live Chat is Used for Day to Day interactions with customers.

Sandbox is a copy of live running projects data and it is used for testing purposes. while the production environment is live running projects.

Service Cloud includes a service cloud console for cases, messages etc. Sales Cloud inlcudes functionality like Leads,Contacts, Opportunities and so on.

Salesforce Editions:-

Salesforce Group Edition

Unlimited Edition

Enterprise Edition

Professional Edition

A lightning:select component creates an HTML select element. This component uses HTML option elements to create options in the dropdown list, enabling you to select a single option from the list

Yes, We can Convert Master Detail Relationship into Lookup.

Returns the status of an asynchronous insert or update operation based on the unique identifier associated with each modification.

Utility Classes are helper classes that are reused for further use.

Hi Sumit,

A dashboard is a visual display of key metrics and trends for records in your org.

Hi Sumit

Please find chart types salesforce Dashboards:

Bar Charts
Column Charts

Line Charts

Pie Charts

Donut Charts

Funnel Charts

Scatter Charts