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?

Which code should be used to update an existing Visualforce page that uses standard Visualforce components so that the page matches the look and feel of Lightning Experience?

What are two ways a developer can get the status of an enquered job for a class that queueable interface? Choose 2 answers

The initial value for a number field on a record is 1. A user updated the value of the number field to 10.
This action invokes a workflow field update, which changes the value of the number field to 11. After the workflow field update, an update trigger fires.What is the value of the number field of the object that is obtained from Trigger.old?

A developer considers the following snippet of code:

Based on this code, what is the value of x?