A Lightning bundle is a folder that contains definition files. Unlike other metadata components, Unlike other metadata components, an AuraDefinitionBundle component isn’t represented by a single component file but instead by a collection of component definition files.

No, We can not create a field in custom object containing some records with master detail relationship in Salesforce.

We have many custom javascript buttons in our org but we would not move these buttons to Salesforce so there is no specific way to do that.

No, it is not possible to display any message from a trigger directly.

Custom settings are similar to custom objects and enable application developers to create custom sets of data, as well as create and associate custom data for an organization, profile, or specific user. The custom setting data can then be used by formula fields, validation rules, flows, Apex, and the SOAP API.

10 Seconds is the default timeout period while calling webservice from Apex in Salesforce.

No, you can not delete a user in Salesforce but you can deactivate the user account or you can freeze the account of that particular user.

I create my list view buttons with this technique and as this uses seperate pages per button the page messages created in the Controller Extension seems to land in them and NOT in the displaying detail page.

The disconnectedCallback() lifecycle hook fires when a component is removed from the DOM(Data Object Model). It is just opposite of the connectedCallback().

Git pull – In Salesforce, Git pull can update and merge any remote changes of the present branch you are on.

Git fetch – In Salesforce, Git fetch can update only the branch you are on, however not merge any changes in.