F451: Hardware - Peripheral Devices

Question 1

What is MICR - Magnetic Ink Character Reading

Answer 1

MICR (magnetic ink character recognition) is a technology used to verify the legitimacy or originality of paper documents, especially checks. Special ink, which is sensitive to magnetic fields, is used in the printing of certain characters on the original documents. Information can be encoded in the magnetic characters.

Question 2

What is OMR - Optical Mark Reading

Answer 2

Is the process of gathering information from human beings by recognizing marks on a document. OMR is accomplished by using a hardware device (scanner) that detects a reflection or limited light transmittance on or through piece of paper. OMR allows for the processing of hundreds or thousands of physical documents per hour.

Question 3

What is OCR - Optical Character Reading

Answer 3

OCR is the process of taking images or photographs of letters or typewritten text and converting them into data that a computer can interpret. Data is generally passed into the computer by using a scanner or other hardware device, like a digital camera.

Question 4

What is an Actuator?

Answer 4

An actuator is an electronic device controlled by a motor that moves the hard drive head arm.

Question 5

Define Buffer

Answer 5

Is a small area of the computer that hold data temporarily holds data and transports data around the computer.

Question 6

Define Interrupt

Answer 6

A signal or message sent to the processor which stops the current activity of the processor, and controls the flow of data from the processor to the buffer.

Question 7

Name the differences between ROM and RAM

Answer 7

RAM is large, ROM is small
ROM is non-volatile, RAM is volatile
ROM cannot be altered, RAM can be altered