Scenario based security questions (If a user A wants to have access of records of user B how can you achieve it, what can be the OWD in that case)

Tell me about permission sets

If we want to make validation rules to run only for some users and not for all, how can we achieve it?

How can we declare variables in LWC

Child to parent communication in LWC

There are two unrelated components on a page. How can we send data from one to another?

How do you bind the variables?(Different ways of fetching data from backend in lwc) For the same given below task - Fetch the data from the contact object whose last name contains ‘test’ and display the data in lwc. Questions on the same - what is $, why have you used it?

Suppose there is a member object which is on the detail side and a department object on the master side. There is one field on the member, let's say salary. Display the average salary of all members associated with a department. In how many ways can you achieve this? Write the trigger for the same.