Transformation items

Chapter 4 presents about tests of grammar and usage. This chapter include contents as: Multiple - choice items, error recognition items, rearrange items, completion items, transformation items, items involving the changing of words,...

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Transform categorical attribute into asymmetric binary variables Introduce a new “item” for each distinct attribute-value pair Example: replace Browser Type attribute with Browser Type = Internet Explorer Browser Type = Mozilla Browser Type = Mozilla

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Reversing data items Ex.: Reverse a list. Convert Decimal to Binary. Brackets Parse. Infix to Postfix Transformation. Evaluate a Postfix Expression. Parsing Ex.: Ex.: Postponement of processing data items Backtracking Ex.: Goal Seeking Problem. Knight’s Tour. Exiting a Maze. Eight Queens Problem. .Reverse a list PROBLEM: Read n numbers, print the list in reverse order. Algorithm ReverseList Pre User supplies numbers. Post The numbers are printed in reverse order. Uses Stack ADT. 1. loop (stack is not full and there is more number) 1. read a number 2.

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