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Q.1)	Screens that receive analog signals commonly connect to which of the following?

A.	VGA connector

B.	DVI connector

C.	HDMI connector

D.	USB connector

Q.2)	A device that projects a transparent image over the real view of the world so the user need not change their focus is known as a:

A.

Headset

B.	Virtual reality system

C.	Head up display

D.	Visual display unit

Q.3)	How is the image on an LCD screen maintained between screen refreshes?

A.	A phosphors glow for a period of time sufficient to maintain the image between refreshes.

B.	The liquid crystals remain in alignment between screen refreshes.

C.	A filter ensure the image remains stable whilst the screen is refreshed

D.	Each pixel has its own capacitor that holds the electrical current between screen refreshes

Q.4)	A touch panel flexes slightly as it is touched. The underlying technology is most likely which of the following?

A.

Resistive

B.	Capacitive

C.

SAW

D.	Transitive

Q.5)	DLP projectors form images using which of the following?

A.	Small LCD screens

B.	Miniature tilting mirrors

C.	Tiny reflective ribbons

D.	Transmissive CRT technology

Q.6)	The volume of sound waves is determined by their:

A.

Frequency

B.	Wavelength

C.

Bit depth

D.

Amplitude

Q.7)	Which of the following produces the light illuminating an LCD screen?

A.	Liquid Crystals

B.	Polarizing panels

C.	Phosphor coating

D.	Fluorescent tube

Q.8)	Speakers perform which of the following conversions?

A.	Digital signal to analog sound wave

B.	Analog signal to digital sound wave

C.	Analog signal to analog sound wave

D.	Digital signal to digital sound wave

Q.9)	Most current optical drives use a CAV system. A consequence of this technology is:

A.	Data located further from the centre of Th. Disk is read more rapidly.

B.	Data is read at a constant rate regardless of its location on the disk

C.	More data can be stored on the disk with the same size and density

D.	The spindle motor must alter its speed depending on the current position of the read head.

Q.10)	What is purpose of EFM encoding of data on optical disks?

A.	To correct read errors efficiently as the data is being read

B.	So that transition between pits and lands can be used to represent binary digits

C.	To avoid long pits and lands which are difficult to read reliably

D.	To convert each byte of data into fourteen bits.

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