engineering recuitment FSSAI Technical Officer & Central Food Safety Officer Mock Test 2021 Computer Awareness Introduction to Computers
Which of the following statement is false?
1
Bar-codes are printed using special ink containing iron oxide.
2
A bar-code reader uses laser-beam scanning technology.
3
On goods, postal packages, books etc. we use bar-code for unique identification.
4
Bar-codes represents data using combination of vertical lines.