System Maintenance | List four recording techniques used in storage devices.

1. FM (Frequency Modulation) 

2. MFM (Modified Frequency Modulation) 

3. RLL (Run Length Limited). 

4.  Perpendicular Recording

--------------------------------------------------------

What is dot pitch and frame rate?

Dot pitch: It is the distance between each group (triad) of red, blue and green phosphors. A smaller dot pitch helps produce sharper and clearer image

Frame Rate: This is used to show the number of times a screen full of information is produced per second or the number of times a frame is shown (in one second) on the monitor. 

---------------------------------------------------------

Define:

1) Blackout

2) Surge

1) Blackout: It is the complete loss of electrical power where voltage and current drop to a very low value (typically zero). They are caused due to physical interruption in the local network. 

2) Surge: They are small over voltage conditions that take place over  relatively long periods of few milliseconds.

----------------------------------------------------------