How many strings of length 4 over the alphabet (a, b, c) either start with the character a or end with the character a? 45 54 81 162 27

What is the set of V of all vowels in the English alphabet

Write a regular expression for each of the following sets of binary strings. Use only the basic operations. all binary strings except empty string begins with 1 and ends with a 1 ends with 00 contains at least three 1s

Given the NFA below, trace its operation on each of the strings shown, and tell whether each of the strings below are accepted by the NFA. (Yes or No) a a) aaaaaaaa b) bababa c) aba d) abba e) ababa a 2 b a a 3

Write a regular expression for each of the following sets of binary strings. Use only the basic operations. contains the substring 110 doesn't contain the substring 110 whose tenth symbol from the right is 1 not containing 101 as a substring

Can someone explain to me each step and why it would be the respective answers?

All computers store the strings of O's and 1's of binary numbers in the same format. True False

A What bit string represents the bitwise OR of bit strings 0110 and 1110?  B What is the difference of these sets, i.e., {1,3,4} - {2,3,5}?   C What is the value of x after this statement is encountered in a computer program, if x = 1 before the statement is reached? if x + 1 < 3 then x := x + 1 D What is the union of sets {1,3,4} and {2,3,5}? E What is the cartesian product of sets {1,3,4} and {2,9}? F Let U={0,1,2,3,4,5,6,7}. What bitstring represents the subset of all odd integers in U? G What is the powerset of set {1,3,4}? H What bit string represents the bitwise AND of bit strings 0110 and 1110? I What is the intersection of sets {1,3,4} and {2,3,5}?

Use the following prefix code: a = 1010, t = 11, e = 0, s = 1011, n = 1001, i = 10001 to decode the string 11010011001100011011 into an english word. Enter your answer with no spaces between the letters.