# Recent posts tagged probability

1
@Arjun Sir query is correlated.. For each Professor P it checks inner query. If it is nested then NOT EXISTS always return false but here inner query relates outer query by correlated variable P.. Is it not so ??
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Q. 84 By seeing the question, we know the strings of form ab, aabb, aaabbb...... are not possible. Epsilon is also not possible. Now, just check the options with the string ab. Option A, B, C are generating ab. So, correct answer is D.
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No, heap should also do, just that we have to use min-heap. (C) should be the answer.
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A relation $R$ is defined on the set of integers as $xRy$ iff $(x + y)$ is even. Which of the following statements is true? $R$ is not an equivalence relation $R$ is an equivalence relation having 1 equivalence class $R$ is an equivalence relation having 2 equivalence classes $R$ is an equivalence relation having 3 equivalence classes
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