Which of the following is NOT an advantage of sequential files over
random-access files?  A0 make efficient use of disk space B) efficient
at updating large portions of a file C) Easy to create D) efficient at
changing a specified record E)none of the above

Assume you want to implement a binary search on a sorted data file
with fixed-length records. Which is the best way to open and access
the file?

(A)      Random access

(B)       Sequential access for input

(C)       Sequential access for output

(D)      All of the above

 

 

27.     Assume you have an unsorted data file that does not have
fixed-length records. Which combination is best for opening and
searching the file?

(A)      Open for random-access, search binary

(B)       Open for random-access, search sequential

(C)       Open for sequential-access, search binary

(D)      Open for sequential-access, search sequential