Computer Basic Information
Which is not necessary when using bar codes in supermarkets?

Point-of sale (POS) terminal
Check digit on the bar code
Price on the goods
None of these
Price on the shelf

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Computer Basic Information
The Santa Clara Valley, California is popularly known as Silicon Valley of America because

None of these
it is full of large grain sand
huge deposits of silicon are found there
many silicon chip manufacturing firms are located there
Santa Claus visits it every Christmas

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