901 practice test display device

What type of unit is used to describe the refresh rate of a computer screen? A. Hz B. cd/m2 C. MHz D. Lumen E. KHz

A

Which of the following answers describe the function of a power inverter? (Select 2 answers) A. Converts AC power into DC power B. Used for supplying voltage to backlights of an LCD panel C. Converts DC power into AC power D. Used for supplying voltage to backlights of an OLED display

B, C

When a computer monitor is unable to display image on the screen, the most common causes (and the easiest ones to fix) for this problem include: (Select 2 answers) A. Inverter failure B. Loose cable connections C. Bad LCD display D. Wrong input selection E. Backlight failure

B, D

A dim display on a laptop LCD screen might indicate a problem related to: (Select 2 answers) A. Stuck pixels B. Backlight C. Dead pixels D. Incorrect color patterns E. Inverter

B, E

A permanent computer display screen discoloration caused by displaying the same static image for extended periods of time is known as: A. Artifact B. Stuck pixel C. Burn-in D. Dead pixel

C

In computer graphics, the frequency at which the screen is redrawn is called: A. Aspect ratio B. Interlacing C. Refresh rate D. Screen resolution

C

The relative horizontal and vertical size of a digital image displayed on the graphics monitor screen is referred to as: A. Frame rate B. Screen resolution C. Aspect ratio D. Native resolution

C

Which of the following answers refers to the standard display format for HDTV? A. 4:3 aspect ratio B. 5:4 aspect ratio C. 16:9 aspect ratio D. 16:10 aspect ratio

C

Which of the following countermeasures prevents shoulder surfing? A. Cable locks B. Video surveillance C. Privacy filters D. Security guards E. Screensavers

C

Which of the following units is used for measuring the brightness of an image rendered by an image projector? A. dB B. cd/m2 C. Lumen ( Your answer) D. Hz

C

Display devices with aspect ratios of 16:10 and 16:9 are commonly referred to as: A. UXGA displays B. Fullscreen displays C. WUXGA displays D. Widescreen displays

D

Which of the actions listed below should be of help while troubleshooting non-responsive touchscreen of a mobile device? A. Reseating the device's battery B. Erasing all content/settings and restoring the device to factory defaults (factory reset/hard reset) C. Pressing a specific key combination/button to perform system restart (soft reset) D. Removing screen protector and cleaning the screen E. All of the above

E

Which of the LCD technologies listed below offers the fastest response time? A. Twisted Nematic (TN) B. Cathode Ray Tube (CRT) C. Ultra Extended Graphics Array (UXGA) D. In-Plane Switching (IPS)

A

Which of the acronyms listed below refers to a new type of thin and lightweight display devices offering higher contrast ratio and color quality in comparison to LCD without the need for a special light source to produce a visible image? A. OLED B. LED C. HDMI D. HTPC

A

Which of the following answers describe the features of the Twisted Nematic (TN) LCD panel technology? (Select 3 answers) A. Low viewing angles B. Fast response times C. Low color quality D. High color quality E. Slow response times F. Wide viewing angles

A, B, C

Examples of devices posing risk to electrical safety due to accumulated high voltage include: (Select all that apply) A. CRTs B. Power supplies C. Inverters D. CPUs E. Laser printers

A, B, C, E

Which of the following statements are true? (Select all that apply) A. A digital image displayed on the graphics monitor screen consists of pixels arranged in rows and columns B. The term "screen resolution" refers to the maximum number of pixels in each dimension (horizontal and vertical) that can be addressed by a digital display device C. In order to ensure the sharpest text and image displayed by a CRT monitor it is usually recommended to set the monitor to run only at a specific resolution (which is also referred to as the CRT's native resolution) D. The term "screen resolution" refers to the relative horizontal and vertical size of a digital image displayed on the graphics monitor screen The smallest unit of a digital image represented on the digital display device is known as pixel ( Your answer) E. In order to ensure the sharpest text and image displayed by a LCD monitor it is usually recommended to set the monitor to run only at a specific resolution (which is also referred to as the LCD's native resolution)

A, B, D, E

What are the characteristic features of the In-Plane Switching (IPS) LCD panel technology? (Select 3 answers) A. High color quality B. Fast response times C. Wide viewing angles D. Low color quality E. Slow response times F. Low viewing angles

A, C, E

A monitor filter used to reduce reflection from the surface of a CRT or LCD display is called: A. Widescreen B. Antiglare C. Flat panel D. Privacy filter

B

Which of the acronyms listed below refers to an LCD panel taking advantage of fluorescent lamps? A. LED B. CCFL C. DFS D. OLED

B

Which of the terms listed below refers to the distorted display geometry issue? A. Frame rate B. Aspect ratio C. Native resolution D. Refresh rate

B