Question

What is a Punch Card, and how was it used in old computer systems?

a.

A card for computer gaming

b.

A card for data encryption

c.

A card medium used to store data in old computer systems with 80 columns and several rows

d.

A card for database backups

Posted under Data Warehousing and OLAP

Answer: (c).A card medium used to store data in old computer systems with 80 columns and several rows Explanation:A Punch Card is a card medium that was used to store data in old computer systems. Each card had 80 columns and several rows to store data.

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