# NPTEL Data Base Management System Assignment 1 Answers 2023

NPTEL Data Base Management System Assignment 1 Answers 2023? This article will help you with the answer to the National Programme on Technology Enhanced Learning (NPTEL) Course “ Data Base Management System Assignment 1

Below you can find the answers for Data Base Management System Assignment 1 Answers 2023

## NPTEL Data Base Management System Assignment 1 Answers 2023:-

Q1. Which level of abstraction describes types of data that are stored in the Database?

Q2. Identify the valid primary key for the relation paper_info from the given instance.

Q3. Identify the correct statement/s.

a) Project(pCode, pName) is an instance of a relation schema.
b) Project(pCode, pName) is an example of a physical schema.
c) (2245, HardFort) is an instance of a relation schema.

d) (2245, HardFort) is an example of a logical schema.

Q4. Consider a relation Vehicle(VID, Model, Speed, Color) where the superkeys are as follows:
{VID}, {VID, Model}, {Speed, Color}, {Speed, Color, Model}.
Select the possible candidate key(s).

Q5. Consider the following relations:

Book(ISBN,Title,Pages)

BookGenre (ISBN, Genre)

‘What does the following relational algebra expression represent?
HISBII((”’Pages> 100Bo0k) M (0eanre—:Fiction’BOOKGeNTe))

Q6.Consider the following relational schema:

ImageCode (ImageID, Name)

ImageBook (BookID, ImageID, Page)

‘What will be the Relational Algebra equivalent to the following statement?
“Find the names of all Images on Page 100.”

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Q7.‘Which of the following operations will return S1 itself?

Q8. Identify the correct operation(s) which produces the following output from the above relation.

Q9. Identify the correct operation(s) which will be produce the following output from the above
two relatioms.

Q10. ‘Which of the following can be a candidate key for the following instance?