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Summary Computer Application Technology (CAT) practical notes

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For my matric final exam in 2022 I passed with an 80%. I got over 80% for every practical test as well as exams. For September exam I achieved an 86% with practical. These notes are a basic summary of all the years work (gr10-12). It is essential to go through your textbook, if I have missed anythi...

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  • August 6, 2024
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CAT PRACTICALS
Excel:
Functions:
=sum( )  Calculate the sum Time: deduct time
=average( )  Calculate the average  Convert to number

=max( )  Calculate the maximum  Multiply with 24 to get day
switched to time
=min( )  Calculate the minimum
Divide w/ 365 to get years
=large( )  Largest N number
Divide w/ 30 to get months
=small( )  Smallest N number
=mode( ) Occurs most often
=median( )  Middle value
=count( ) Counts all the values with numbers in
=counta( ) Counts all the values
=countblank( ) Counts all the values that are blank
=power( ) To the power of e.g. 22
=rand( )  “random” number between 0 and 1
=randbetween( )  “random" number between a specific range of numbers
=round( ) rounds the number to the nearest whole number
=rounddown( )  round the number downwards e.g. Rounddown(4.567,2) = 4.56
=roundup( ) rounds the number upwards e.g. Roundup(4.567,2) = 4.57
=int( ) round a number down towards the nearest whole number
=trunc( ) removes the fraction of the number
=day( ) day between 1 and 31
=month( )  month between 1 and 12
=year( )
=days( )  the amount of days between 2 dates
=date( ) date
=today( ) todays date
=hour( )  hour between 1 and 23
=minute( )  minute between 1 and 59
=second( )  second between 1 and 59
=time( )

, =countif( )  only counts values according to specific criteria
=sumif( )  only counts numbers according to specific criteria
=countifs( )   only counts values according to specific criteria’s
=sumifs( ) only counts numbers according to specific criteria’s
Wildcard a placeholder that can showcase a character or a series of characters
*  empty string – any number or character
?  One exact character
*Note that we only use these at countif and sumif
=if( )  it allows you to make logical comparisons between a value and what you expect
=if( condition, true, false )
Nexted if  if inside another if
And  Multiple conditions – BOTH must be true
Not  Invert criteria – true – false
Or  One condition must be true


=vlookup( )  Vertical – top to bottom
=hlookup( )  Horizontal – left to right *remember absolute cell referencing

$ or F4

True  approximate match
False  exact match


Text functions:
Concatenate  combine strings
Len  find out how many characters the string has
Upper  turns to capital letters
Lower  turns to lowercase
Left  withdraw left side N characters
Right  withdraw right side N characters
Mid  withdraw N characters of M position
Find  determine the first position of the substring
Value  change a string to a number



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