Question
A relation R(A, B, C,
- D has the functional dependencies AB -> C, C -> D and D -> A. How many candidate keys does R have?
More IT DBMS Questions
- What is 'normalization' in database design?
- Which of the following is a type of database index?
- In a relational database, what is a foreign key?
- Which type of relationship exists when a record in one table can relate to multiple records in another table, and vice versa?
- A transaction that reads a value then later sees a different value because another transaction updated and committed in between experiences which anomaly?
- Which type of SQL JOIN returns all rows from both tables involved, placing NULLs in columns where there is no matching row on the other side?
- A transaction transfers ₹500 from A to B. The system crashes after debiting A but before crediting B. Which ACID property prevents a permanently half-compl...
- Phantom Reads occur when:
- Transaction T1 holds a lock on resource A and requests a lock on resource B. Transaction T2 holds a lock on resource B and requests a lock on resource A. B...
- Relation R(Student, Course, Hobby) stores every course a student takes and every hobby they have, independently of each other, producing a full cross-produ...
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)