A developer wants to import 500 Opportunity records into a sandbox. Why should the developer choose to use data Loader instead of Data Import Wizard?

Which code displays the contents of a Visualforce page as a PDF?

A developer receives an error when trying to call a global server-side method using the remoteAction decorator.
How can the developer resolve the error?

How can a developer avoid exceeding governor limits when using Apex Triggers? (Choose 2)

Universal Container is building a recruiting app with an Applicant object that stores information about an individual person that represents a job. Each application may apply for more than one job.
What should a developer implement to represent that an applicant has applied for a job?