Q. If suppose we've given a cache of length k = 3, an initial state {a, b, c}, and a known schedule of items needing to be cached, {b, e, d, a, c, b, e, a}, what will the state of the cache be after five steps if the farthest-in-future approach is used to determine which item to remove from the cache? a. {b, c, e} b. {b, d, a} c. {b, c, d} d. {c, d, a} {b,c,d} seems to be wrong answer. Could you help me with the correct one ?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Q. If suppose we've given a cache of length k = 3, an initial state {a, b, c}, and a known schedule of items needing to be cached, {b, e, d, a, c, b, e, a}, what will the state of the cache be after five steps if the farthest-in-future approach is used to determine which item to remove from the cache?
a. {b, c, e}
b. {b, d, a}
 
c. {b, c, d}
 d. {c, d, a}

{b,c,d} seems to be wrong answer. Could you help me with the correct one ?
  
 
 
 
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