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Database Systems(BCSE302L)
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Assume that
domain D1 has the following set of values: {4,4,5,6,7,8,8,9}. What value
will be returned by a relational algebra expression corresponding to the
statement count(D1)?
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Which of the following is mainly concerned with 5NF
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The non-prime
attributes of the relation R(A,B,C,D,E) with functional dependencies
{AE->BC, AC->D, CD->BE, D->E} is/are:
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48. Transaction rollback ensures which ACID property?
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36. In strict 2PL, locks are released:
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49. Schedule S: T1: r(x), w(x); T2: r(x), w(x); T3: r(x). Which is true?
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18. In Thomas Write Rule, obsolete writes are:
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47. Two transactions: T1 reads x, T2 writes x after. Result?
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16. In immediate update, if a transaction fails before commit, what happens?
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