Question
The given equation has been solved on the basis of a
certain rule. Find the correct answer for the unsolved equation on that basis. If P × Q = PQ(P + Q), then (2 × 2) + (4 × 4)Solution
P × Q = PQ(P + Q), Similarly, P x Q = (2 × 2) = 4 x (2 + 2) = 4 x 4 = 16 P x Q = (4 × 4) = 16 x (4 + 4) = 16 x 8 = 128 Hence, required answer = 16 + 128 = 144
Which of the following commands are used to put a restriction on the number of rows returned from a query?
Distributed transactions typically use which protocol for atomicity?
Which type of join returns only matching records from both tables?
A `FOREIGN KEY` constraint is used to:
In two-phase locking, a transaction releases its locks:
Bitmap indexes are most efficient when:
What is a primary key in a relational database?
Which normal form eliminates repeating groups by putting them into separate tables and connecting them through foreign keys?
In a relational schema, which normal form eliminates transitive dependencies (i.e., non-prime attribute depends on another non-prime attribute)?
A transaction that reads a value then later sees a different value because another transaction updated and committed in between experiences which anomaly?
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