Which of the following statement(s) is/are true about HDFS ?

(i) Keeping the HDFS block size large reduces the disk seek time
(ii) HDFS files are immutable
(iii) The NameNode stores block locations in EditLog

 only (i) and (ii) 
 Only ( i) and (iii) 
 only (iii) 
 all the given statements are true
Correct Option - a

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