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Ans 1 )
A cache is a type of memory that is relatively small, but really fast. It stores information that is frequently needed for quick access. A CPU cache increases the speed of the computer, since accessing information on the cache is much faster than accessing the main memory.
Ans 2)
GUI stands for Graphical User Interface.
Ans 3)
A screen saver is a computer program that blanks the screen or fills it with moving images or patterns when the computer has been idle for a long time. The original purpose of screensavers was to prevent phosphor burn-in on CRT and plasma computer monitors.
Ans 4)
The IF function runs a logical test and returns one value for a TRUE result, and another for a FALSE result. For example, to "pass" scores above 70: =IF(A1>70,"Pass","Fail"). More than one condition can be tested by nesting IF functions.
Ans 5)
A primary key is either an existing table column or a column that is specifically generated by the database according to a defined sequence. For example, students are routinely assigned unique identification (ID) numbers, and all adults receive government-assigned and uniquely-identifiable Social Security numbers.
Ans 6)
Spreadsheet is a piece of paper or a computer program used for accounting and recording data using rows and columns into which information can be entered. Microsoft Excel, a program in which you enter data into columns, is an example of a spreadsheet program.
Advantage of electronic Spreadsheet :
- Easy to move copy, edit, and delete table entries.
- Easy to format design and appearance of table.
- Ability to perform "what-if" or sensitivity analysis by changing values to see how related entries are adjusted.
- Easy to create charts to display relationships among values in the worksheet
- Ability to open and use multiple spreadsheets at one time.