Which of the following operating system types will allo……

单项选择题Which of the following processing types allows two instructions to be received and processednanoseconds apart?（）

A. Quad core
B. Triple core
C. Dual core
D. Hyper-threading

单项选择题The technician is repairing a PC which appears to have a failing RAM module. After replacing the module, the extra memory still is not registering. Which of the following is MOST likely the issue?（）

A. Jumper settings are incorrect
B. The RAM module is defective
C. The memory slot is defective
D. CMOS needs to be flashed

单项选择题Which of the following technologies is the MOST secure form of wireless encryption?（）

A.SSL
B.WPA
C.WEP
D.TLS

单项选择题A technician arrives in Germany and discovers that when their PC is plugged into the outlet, nopower is received. Which of the following actions should the technician take to get the PC tooperate?（）

A. Change the BIOS settings to the local time
B. Adjust the voltage selector switch
C. Attach a 220 volt power strip from the current region to the PC
D. Attach a 120 volt battery backup power supply to the PC

单项选择题The contrast ratio for an LCD monitor is BEST defined as the ratio between:（）

A. display resolution and brightness.
B. power consumption and output intensity.
C. power savings of a comparable crt monitor and the lcd.
D. the darkest and lightest displayed output.