What will be the output in the debug log in the event of a QueryExeption during a call to the @query method in the following Example?

The operation manager at a construction company uses a custom object called Machinery to manage the usage and maintenance of its cranes and other machinery. The manager wants to be able to assign machinery to different constructions jobs, and track the dates and costs associated with each job. More than one piece of machinery can be assigned to one construction job.
What should a developer do to meet these requirements?

A sales manager wants to make sure that whenever an opportunity stage is changed to 'Closed Won', a new case will be of created for the support team to collect necessary information from the customer. How should a developer accomplish this?

Which two describe Heroku Redis? Choose 2 answers.

When using SalesforceDX, what does a developer need to enable to create and manage scratch orgs?