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(1) ans : The first recorded zero appeared in Mesopotamia around 3 B.C. The Mayans invented it independently circa 4 A.D. It was later devised in India in the mid-fifth century, spread to Cambodia near the end of the seventh century, and into China and the Islamic countries at the end.
(2) ans : Details" view will display the content as a list of filed or folder names preceded by small icons.
(3) ans : In database technologies, a rollback is an operation which returns the database to some previous state. Rollbacks are important for database integrity, because they mean that the database can be restored to a clean copy even after erroneous operations are performe
(4) ans : A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion.
(5) ans : 1971 The first computer virus, called "Creeper system", was an experimental self-replicating virus released in 1971. It was filling up the hard drive until a computer could not operate any further.
(6) ans : Highlight the cells you want to find the largest number from. Select the Formulas tab. Click Autosum. Select Max from the drop down menu.
(7) ans :Joining 2 or more text values together are called concatenation.
(8) ans : data validation option
To restrict cell entries within a specified range use data validation option. Data Validation is your answer.