321 - Quiz07
Quiz
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Computers
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University
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Practice Problem
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Medium
Malcolm McCullough
Used 10+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
One of the following valid Regular Expression is equivalent to the Regular Expression a? Which one is it?
a|ε
[a]
a+ε
not a valid RE
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
RE: (a|b)* is equivalent to b*a*
No
Yes
maybe
I should guess
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
RE: (a|b)* is equivalent to (a*b*)*
No
yes
Maybe
I should guess
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The Cambridge notation for z = x + 2 * y is?
(z (x (2 y*)+)=)
(= z (+ x (* 2 y)))
= z + x * 2 y
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Before you can use a grammar to create a LL(1) parser, you must
Remove Left Recursion
Calculate the First set for each Terminal
Make sure each production rule has a single RHS
make sure the current sentential form look like αAβ
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
LR parsers are table driven; uses a Left-to-right reading of input; create Rightmost derivation (in reverser order)
True
False
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Regular Expression: [ch]?at - matches which of the following?
hat
cat
at
chat
hcat
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