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Answer Posted / viney
chain is a combination of setll+read... dat is both pointer
is set on lower limit and then file is read.. dnt need 2
give different command 4 pointer set and read...
whereas reade will read d file sequentially at pointer set
2 value equal 2 reade.... in dis pointer can b set 2 a
specified/desired value but in chain by default pointer is
set at lower limit
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