Question

@ How Primary memary is
-different from secondary memory
write short notes on the bellone
following
@ Printer and its type
Bacode reader​

Answer 1

Answer:

Explanation:Primary memory is

1 Fast

2 Volatile

3 expensive

4 Used to keep data at hand for the ALU to work on

Secondary memory is

1 slow

2 Non volatile

3 comparatively cheap

4 The data from secondary memory is first transferred to primary memory

Printer- It is used to issue a hard copy of the data. There are various type of printers such as

Laserjet

Inkjet

DOT printers

The number of dots per square inch determines the printers resolution.

Barcode Readers are the hand held scanners version of the tradiotional scanners.

They are mainly used to get a quick interpretation of the Bar codes.