ambiguous grammar

Question

if following grammar ambiguous ?

S->aSbS|bSaS|λ

Comments

Given Grammar is a Unambiguous Grammar.we Can't draw more than one parse tree for a string.

Answer 1

Ambiguous grammer

Comments

Given grammer is unambiguous because first asbs start with a and next bsas  start with b both output are not same .bsas make ba and asbs make ab Ab and ba are not same

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the fact is the string abab can be derived by using 2 different parse tree so it is ambiguous

Answer 2

Given grammer is unambiguous because first asbs start with a and next bsas  start with b both output are not same