In the following questions about which models have the specified attributes or properties use one or more of the following abbreviations for your answers: DFA, NFA, e-NFA, 2 DFA, PDA, TM, All or None a. Which models have a finite input alphabet?
b. Which models have an infinite input alphabet?
c. Which models have an additional alphabet besides the input alphabet?
d. Which models have a read only tape head?

My has been slow anyone else’s ?

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

What is the error in the following pseudocode? module main() call raisetopower(2, 1.5) end module module raisetopower(real value, integer power) declare real result set result = value^power display result end module