State the purpose of the checkpoint mechanism. How often should checkpoints be performed? How does the frequency of checkpoints affect. a. System performance when no failure occurs
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The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade. A C —– 2 4 3 4 4 3 5 2 7 2 9 5 6 4 The set of all tuples that must be additionally deleted to preserve referential integrity when ...
Two transactions T1 and T2 are given as: T1: r1(X) w1(X)r1(Y)w1(Y) T2 : r2(Y)w2(Y)r2(Z)w2(Z) where ri(V) denotes a read operation by transaction Ti on a variable V and wi(V) denotes a write operation by transaction Ti on a variable V. Calculate The total number ...
Create a package which contains function to ask the user to enter the student’s marks and determine the GRADE according to the following criteria. >90 A >80AND <90 B >70AND <80 C >60 AND<70 D <60 F
Create a binary search tree with the input given below: 98, 2, 48, 12, 56, 32, 4, 67, 23, 87, 23, 55, 46 (a) Insert 21, 39, 45, 54, and 63 into the tree
Create table named emp have two column id and salary with number datatype. Insert the value into the table created using procedures.