This document contains 55 questions related to data management, data science, databases, data warehousing, OLAP, SQL, indexing, query processing, normalization, NoSQL databases like MongoDB, Cassandra, Bigtable and PNUTS. The questions cover topics like the roles of data scientists, applying data science, exploratory data analysis, data modeling, relational databases, data warehousing, OLAP vs OLTP, indexing, query processing, ACID properties, normalization, NoSQL databases and their architectures.

1. Dr. SwarnalathaK.S
Introduction to data management
Question Bank
1. Describe the roles of data scientist.
2. Mention some of the domain where data science can be applied.
3. Describe the statistical inference of exploratory data analysis with case study.
4. Explain the key principles of data management and relational data base management
system.
5. Summarize different data model used in relational DBMS
6. Difference between Database and Data Warehouse
7. Mention some of the advantages and disadvantages of data warehouse
8. What is OLAP and OLTP?
9. What are the operations that can be performed on OLAP.
10. What are the different types of OLAP explain briefly
11. Explain the significance of indexing in DBMS. Types of indexing
12. Highlight the merits and demerits of indexing
13. Explain with a neat diagram the query processing.
14. Explain with example the steps involved in estimating cost of a query.
15. Write a short note on data logs
16. Distinguish between OnLine Analytical Processing (OLAP) and OnLine Transaction
processing (OLTP).
17. Write SQL queries to
i. To find duplicate records in a table
ii. To find second highest salary of employee
iii. Query to swap 2 column values in relational database
18. Briefly explain the ACID property.
19. Illustrate query processing and query optimization techniques with neat diagram.
20. Design an ER diagram for hospital management system and write the schema for the same.
21. Discuss the significance of state transition diagram of a transaction. Briefly explain the ACID
properties of transactions with example.
22. Explain concurrency protocol and lock based protocol
23. Discuss 2 phase locking protocol with variations in it.
24. Differentiate between deffered database modification and immediate database modification.
25. Describe aggregate functions in SQL
26. Differentiate group by and having clause in SQL
27. Draw an ER diagram for library system and also convert ER diagram to ER schema by following
the rules

2. Dr. SwarnalathaK.S
28. Explain time stamp based protocol
29. Describe different types of failures which will affect the transaction
30. Discuss different types of data base recovery techniques
31. Write a note on check point
32. Describe how data base recovery can be done using undo and redo.
33. Explain the following 1. Conflict serializability 2. View serializability
34. Problems on conflict and view serializability
35. Explain 1Nf , 2NF,3NF, and BCNF with examples
36. Problems on all types of normalization
37. Differentiate between SQL and NO sql data bases , mention its advantages and
disadvantages
38. Compare between hive Cassandra.
39. Differentiate between Cassandra and mongo DB
40. With a neat diagram explain the key components of maongo DB architecture
41. Difference between mongo DB and relational DBms
42. Explain mongo DB CRUD operations
43. Discuss the apache Cassandra features.
44. Explain Cassandra architecture with a neat diagram
45. Explain chubby lock services
46. Describe bigtable with its architecture
47. Summarize the features of Google file system with its architecture
48. Describe the yahoos key value store: Pnuts.
49. Short note on DynamoDB(features, architecture, advantages/disadvanyages)
50. With a neat diagram describe the architecture of Mongo DB and Google file system.
51. Illustrate how yahoo’s key value store (PNUTS) is different than amazon’s key value store
(Dynamo DB).
52. Explain the principles imposed on designing a flexible Mongo DB schema.
53. Differentiate between Apache Cassandra and Mongo DB.
54. Define the following constraints
a. Key
b. Entity integrity
c. Referential integrity
d. Foreign key
e. Semantic integrity
f. Transition and state
55. Define andexplain BCNF. How does it defer from 3NF? Why is it considered a stronger form of
3NF?