单项选择题 Anadministratorlogsintoaserverandnoticesslowperformance.Whenthesystemfinishesthe logonprocessamessageisdisplayedsayingthesystemisoutofVirtualMemory.Whichofthe followingistheMOSTlikelycauseofthisissue？（）

单项选择题 AuserselectstheirproperdomainandisunabletologintotheirWindowscomputer.Theerror states：‘Systemcannotlogyouontothedomainbecausethesystem’scomputeraccountinits primarydomainismissingorthepasswordonthataccountisincorrect’.Whichofthefollowingis theMOSTlikelycauseforthiserror？（）

单项选择题 An administrator identifies that a server is shutting down. The administrator powers up the server and OS loads but after a few minutes it powers down again. Which of the following is the cause?（）