Chapter 13, Problem 7QY

It's a system that uses strands of glass or plastic to send data as bursts of light across long distances.

In a certain font, a monochrome laser printer can print 60 lines of 75 characters per page. The average character occupies a box 2 mm × 2 mm, about 25% of which is toner. The rest is blank (i.e., no toner) The toner layer is 25 microns thick. The printer’s toner cartridge measures 25 × 8 × 2 cm. How many pages is one toner cartridge good for?

VGA mode is used to show visual data on a screen. Why do you think that way, exactly?

Character devices move data faster than block devices. True or not?

A device that converts a physical variable to an electrical signal is a ______________.

It asks to use a system that reads an IR keyboard, and if pressed:button 1 turns on a spotlight and sends the message to an LCD: Garage spotlight onbutton 2 turns off the light and sends a message to an LCD: garage light offbutton 3 activates an ultrasonic sensor and if it detects something within 1 meter, it activates a buzzer and a message onLCD screen: intruder detected.And if the alarm is activated it can only be stopped with the red button of the IR keyboard. The circuit is shown below

Why is it that the element of a display that indicates the useable area of the screen is denoted by the word "refresh rate" when it truly refers to the frequency with which that area is updated?

what is the correct answer: ______  collects the data and sends it to the computer Secondary Storage RAM CPU Input Devices

OCaml Code: Make sure to show the full code and screenshots of the test cases being tested on the terminal.