Answer: D QUESTION: 54 In which of the following scenarios would it be useful to run Repair Disk Permissions in Disk Utility to resolve the issue? A. Computer fails to turn on. B. Cannot complete a OS X Lion install. C. Cannot install any application into /Applications. D. Cannot open one Numbers document. Other Numbers documents open without issue. Answer: C QUESTION: 55 Valerie upgraded her MacBook Pro to OS X Lion and completed a Time Machine backup just before her vacation. She accidentally deleted an important file that she was updating during the trip. How can she use Time Machine to recover the file? A. Boot to the Recovery HD and choose Restore files from a Time Machine Backup. B. Hold the option key then click the Finder Go menu and choose Local Snapshots. C. The file can only be restored when she returns home and has access to the backup drive. D. Restore the file from a local snapshot by entering Time Machine, finding the file, and clicking Restore. Answer: D QUESTION: 56 Which is a valid troubleshooting step to resolve a customer's complaint that his Time Machine backup takes a long time to complete?