1. A relational database consists of a collection of -

Answer. Tables



2. Which represents a relationship among a set of values ?

Answer. Row



3. Using which language can a user request information from a database?

Answer. Query



4. Student(ID, name, dept name, tot_cred) In this query which attributes form the primary key?

Answer. ID



5. Which is a set of one or more attributes taken collectively to uniquely identify a record?

Answer. Super key



6. Consider attributes ID, CITY and NAME. Which one of this can be considered as a super key?

Answer. ID



7. Relational Algebra is a __________ query language that takes two relations as input and produces another relation as an output of the query.

Answer. Procedural



8. Which is a fundamental operation in relational algebra?

Answer. None of the mentioned



9. Find the ID, name, dept name, salary for instructors whose salary is greater than $80,000 .

Answer. {t | t _ instructor _ t[salary] > 80000}



10. A query in the tuple relational calculus is expressed as:

Answer. {t | P(t)}