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Q1. Consider the adhering to four schedules as a result of three transactions (indicated by the subscript) making use of review and also create on a data item X, denoted by r(X) and w(X) respectively. Which among them is conflict serializable ?S1: r1(X); r2(X); w1(X); r3(X); w2(X)S2: r2(X); r1(X); w2(X); r3(X); w1(X)S3: r3(X); r2(X); r1(X); w2(X); w1(X)S4: r2(X); w2(X); r3(X); r1(X); w1(X)
Q3. In a relational schema R whenever a non-trivial sensible dependency X → A holds in relation R, X is a super-vital of relation R. Relation R is in _________The a lot of suitable option to fill in the empty is:
Q4. Consider the adhering to two-phase locking protocol. Suppose a transactivity T accesses (for read or create operations), a certain collection of objects O1,…,Ok. This is done in the complying with manner:Tip 1. T acquires exclusive locks to O1,…,Ok in raising order of their addresses.Step 2. The forced operations are performed.Step 3. All locks are released.This protocol will
Q5. A file is arranged so that the ordering of information records is the exact same as or cshed to the ordering of information entries in some index. Then that index is called
Q6. Consider a schema R(A, B, C, D) and also adhering to functional dependencies.A→ BB→ CC→ DD→ BThen decomplace of R into R1(A, B), R2(B, C) and also R3(B, D) is _______
Q7. Consider the following database table named top_scorer.Top_scorerplayercountryGoalsKloseGermany16RonaldoBrazil15G millerGermany14FontaineFrance13PeleBrazil12KlinsmannGermany11KocsisHungary11BatistutaArgentina10CubillasPeru10LatoPoland10LinekerEngland10T MillerGermany10RahnGermany10Consider the complying with SQL query:SELECT ta.player FROM peak scorer AS taWHERE ta.goals >All (SELECT tb.go
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Q10. In ER diagrams weak entity collection is represented by _____ and also weak entity set has constantly ______ participation via respect to its identifying partnership.