Answer / khader

MDT is modified data tag.
MDT is one bit of the attribute character.
MDT is off(0), it indicates that this field has not been
modified by the terminal operator.
MDT is on(1), it indicates that this field by the
terminatal operator.
FSET is field set. MDT will be set on(set to 1) regardless
of whether the terminal operator modified the data or not.
FRSET is to reset MDT to zero.

Answer / sudarsn

MDT is Modified data tag. it is one bit of attribute
character. by using fset and frset we can modify the MDT value.
FRSET= MDT value is off or set to Zero.
FSET= MDT value is on or set to 1.

Answer / saths

Suppose you display a map and consider the function of that map is to update.To update ,first u fetch a particular record with some id(primary key) . Suppose there are 3 field name ,mark 1, mark2 and you
Just updating mark1 alone.Then
Mdt for name = 0
Mark1 = 1
Mark2 = 0
, So that only mark1 get updated . Name and mark2 will be null.
In order to avoid that we go for fset
Fset will set mdt value for all feild as 1
So ur update will processed perfectly.So, ur name and mark2 will be same as pervious value.
Frset is used to set mdset = 0 for all feild.

How to implement function keys in cics ...Interview ask me there is requirement to include two function key in the program F1 and F2 Keys...when F1 key  is press record should be inserted into database after reading the input file and when F2 is press ,record should be updated in databased...explain about the entire process including testing also..?please expain in step by step ?

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