Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Let L, and L2 be the languages defined as follows:
L1 ={ xe{0,1}* | x has an odd number of Os}.
L2 ={ 0"1m0" | n, m 20}
Which of the following context-free grammars generates the language L1 U L2?
(Here all uppercase letters are variables)
O E- 1E| OF
F- 1F| OE je
A- OAO | B
B - 1B|E
OS-E|A
E - OF | 1E
F- OE | 1F|E
A- OAO | 1A|E
OS- S1 | S2
S1 → 00S | 15 | 01A| 10A | B
A- 10S | 01S
B-1|8
S2→ OS,0| A2
A2 - 1| S2|E
S-E|A
E- 1E| OF
F- 1F| OE je
A- OAO | B
B- 1B|E
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Transcribed Image Text:Let L, and L2 be the languages defined as follows: L1 ={ xe{0,1}* | x has an odd number of Os}. L2 ={ 0"1m0" | n, m 20} Which of the following context-free grammars generates the language L1 U L2? (Here all uppercase letters are variables) O E- 1E| OF F- 1F| OE je A- OAO | B B - 1B|E OS-E|A E - OF | 1E F- OE | 1F|E A- OAO | 1A|E OS- S1 | S2 S1 → 00S | 15 | 01A| 10A | B A- 10S | 01S B-1|8 S2→ OS,0| A2 A2 - 1| S2|E S-E|A E- 1E| OF F- 1F| OE je A- OAO | B B- 1B|E
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