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Answer Posted / sairam
Using Chain we can set the pointer to the particular record
according the criteria specified in the chain operation. But
in this case, if the record is found then the pointer will
be set, otherwise i.e., if the record does not exist then
the pointer will not set. This is the reason why we check
with the %Found keyword. And moreover after reading the
record (in case if the record found and there are more
number of records with the same keyword), we can not move
to the another record, which meets the same criteria
specified in the Chain operation. So the conclusion is we
can not read more number of records with the Chain
operation, if there are more number of records exist with
the same criteria in the file.
Where as using READE, we can read all the records which meet
the same criteria using subsequent READE operation. If there
are no records with the specified criteria then the pointer
will be set to EOF.
| Is This Answer Correct ? | 70 Yes | 5 No |
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