Question: L = { w epsi { 0 , 1 } * : w in Sigma * | every prefix of w has at

L ={ w \epsi {0,1}*: w in \Sigma *| every prefix of w has at least as many 0's as 1's }
Clarification: L states "Every prefix of w contains equal or more 0s than 1s."
Select the correct CFG for L:
A) S ->0S1S |0S |\epsi
B) S -> SS |0S1|1|\epsi
C) S -> SS |0S1|0|\epsi
D) S ->0S1S |1S |\epsi
A prefix is a string consisting of several first letters of a given string, without any reorders. An empty prefix is also a valid prefix. For example, the string "abcd" has 5 prefixes: empty string, "a","ab", "abc" and "abcd".
2 points
a and d
a and b
a and c
a, b and d
a, b and c
a, b, c and d

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Programming Questions!