Q74

MCQMarks unknown

A program $P$ reads and processes $1000$ consecutive records from a sequential file $F$ stored on device $D$ without using any file system facilities. Given the following Size of each record $= 3200$ bytes Access time of $D = 10$ msecs Data transfer rate of $D = 800 \times 10^3$ bytes/second CPU time to process each record $= 3$ msecs What is the elapsed time of $P$ if

(A)

$F$ contains unblocked records and $P$ does not use buffering?

(B)

$F$ contains unblocked records and $P$ uses one buffer (i.e., it always reads ahead into the buffer)?

(C)

records of $F$ are organized using a blocking factor of $2$ (i.e., each block on $D$ contains two records of $F$ ) and $P$ uses one buffer?

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