92) Let r be a relation instance with schema R = (A, B, C, D). We define r1 =∏ A,B,C (r) and r2 = ∏A, D(r)
Let S = r1* r2 where * denotes natural join. Given that the decomposition of r into r1 and r2 is lossy, which one of the following is TRUE?

94) The file organization that provides very fast access to any arbitrary record of a file is

95) The physical location of a record is determined by a mathematical formula that transforms a file key into a record location is :

96) A B-tree of order m has maximum of _____________ children

97) Which two files are used during operation of the DBMS