ISRO CSE 2015 PYQ

Consider the Entity Relationship Diagram (ERD). Which of the following possible relations will not hold if mapped into a relational model?

Consider a log sequence of two transactions on a bank account. System crashes just before log record 7. On restart, which statement is true?

Given a block can hold either 3 records or 10 key pointers. A database contains n records, then how many blocks do we need to hold the data file and the dense index?

The maximum length of an attribute of type text in standard legacy database systems is

Let $R = (A,B,C,D,E,F)$ with dependencies C->F, E->A, EC->D, A->B. Which of the following is a key for R?