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(1). Besides a smartphone, which two of the following can natively (without add-on apps or pairing to another device) be used to make phone calls? (a). Smartwatch (b). Phablet (c). GPS Receiver (d). Tablet (e).PDA (f). Raspberry Pi (2). Power supplies used in desktop computers many years ago, commonly referred to as AT, had a power switch that switched on the 120 VAC going into the power supply. Today’s desktop computers, commonly referred to as ATX, use a power switch that sends a low-voltage logic signal to the _____. (a). Motherboard (b). Power supply relay coil (c). Hard drive (d). CPU (3). A power supply rated at 430 watts will consume 430 watts of electricity every hour such that in 10 hours it will consume 4.3 kilowatts of power. True or False. (4). The power on any voltage rail of the hard drive is calculated by multiplying _____. (a). Voltage X Current (b). Voltage X Watts (c). Current X Watts (d). Voltage X Frequency (5). The difference between a true (online) UPS and a standby UPS (battery backup) is _____. (a). The online UPS is always producing output AC voltage from the battery, the standby UPS only does so when utility power drops below a threshold (b). The online UPS only produces output AC voltage from the battery when the utility voltage drops below a threshold, otherwise it simply routes utility voltage to the output (c). The online UPS is able to signal the computer when it is running on battery, the standby UPS cannot do this. (d). There is no difference
Expert Answer
Ans : Option (d and e) – d) Tablet and e) PDA
The Tablet is a portable computer that uses a touch screen as its primary input device.
PDA : A personal digital assistant (PDA), also known as a handheld PC, or personal digital assistant,[1][2] is a mobile device that functions as a personal information manager.
The phablet (Phone + Tablet) is a class of mobile computing devices designed to combine the size format of smartphones and tablets
These devices are used to make phone calls.
2) Power supplies used in desktop computers many years ago, commonly referred to as AT, had a power switch that switched on the 120 VAC going into the power supply. Today’s desktop computers, commonly referred to as ATX, use a power switch that sends a low-voltage logic signal to the _____.
Ans : Option (b) – power suply relay coil
power supply relay coil means a single value of source voltage intended by design to be applied to the coil or input.
3) A power supply rated at 430 watts will consume 430 watts of electricity every hour such that in 10 hours it will consume 4.3 kilowatts of power. True or False.
Ans : False, why because it just uses the power it needs plus a little overhead so the voltage doesn’t go down if you plug something in there
4) The power on any voltage rail of the hard drive is calculated by multiplying _____.
Ans : Option: (a) — Voltage * Current
Why because Power = Ampere * Voltage.
5) The difference between a true (online) UPS and a standby UPS (battery backup) is _____
Ans: Option (b) — The online UPS only produces output AC voltage from the battery when the utility voltage drops below a threshold, otherwise it simply routes utility voltage to the output
The Standby UPS is connected to an external power source like the computer. If there is a power failure, the UPS will kick in after a few milliseconds.
the Online UPS sits between the AC power source and the computer and is continuously converting AC into DC power and supplying this power to the computer. If there is a power failure, there will be no interruption into the computer as the computer itself is continuously running off DC power.
