单项选择题 After making a long CAT5 cable, the technician fears that the cable may have been damagedduring the pull, but does not have a cable tester. Which of the following would be the BESTalternative tool to determine whether there are any breaks or shorts in the cable?（）

单项选择题 After a technician replaces a laptop display, the technician now notices that the wireless no longer works. Which of the following would be the MOST likely cause？（）

单项选择题 A user has a new laptop with a quad-core processor, and wants to increase the memory of theunit. Which of the following memory types would be the BEST choice?（）