DBMS QUESTION BANK FOR FYBCA (SEM II) SHORT QUESTIONS: UNIT 1

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1 DBMS QUESTION BANK FOR FYBCA (SEM II) SHORT QUESTIONS: UNIT 1 1. Define domain. 2. What do you mean by total participation in a relationship? 3. Explain strong and weak entity set with example. 4. What is derive attribute. 5. Explain referential constraint. 6. Explain relational data model. 7. What do you mean by total participation in a relationship? 8. Explain strong and weak entity set with example. 9. What is derive attribute. 10. What is composite attribute? 11. Explain relational data model. 12. What do you mean by total participation? 13. Explain ER data model. 14. Define aggregation. 15. What is ternary relationship? 16. State the purpose of data models. Explain physical data model. 17. What is data independence? Explain logical data independence. 18. What is instance and schema? 19. What is data abstraction? 20. Differentiate between physical and logical data independence. 21. Explain object oriented data model. 22. Is it possible to change the structure of existing view? If yes then how? 23. List the requirements of DBMS. 24. What is data manager? List its responsibilities. 25. Define DDL. 26. Define DML. 27. Define data dictionary. 28. Write note on DB languages. 29. What do you mean by total participation in a relationship? 30. List out any two-ddl statement and any two-dcl statements. 31. What is data manager list responsibility of data manager? 32. What is a null value? 33. Name any four-database management systems? 34. What are disjoint and overlapping design constraints? 35. What is candidate key?

2 36. List the function of file manager. 37. What is TCL? Write its command. 38. Define DBMS. UNIT 2 1. What do you mean by closure of a set of functional dependency? 2. Give example of decomposition which is loss less but not dependency preserving. 3. Difference between trivial and nontrivial dependency. 4. What are prime and nonprime attributes? 5. What is multivalue dependency? 6. How redundancy can be removed? 7. In which condition you need to denormalize the database. 8. What are the disadvantages of normalization? In which condition you need to normalize the table? 9. What is difference between partial and primary key? 10. How redundancy can be removed? 11. What is the use of canonical cover during normalization? Unit 3 1. Give the general form of query. 2. What is system R? 3. What is data manipulation? 4. Give difference between column level and row level constraint. 5. What is referential integrity? How can you achieve it? 6. What is difference between column level and table (row) level constraint? 7. Define table. 8. What do you understand by data type memo? 9. What is tuple? 10. Define query. 11. What is usage of foreign key? Explain with example. 12. Define primary key. 13. Give difference between delete and drop. 14. Give difference between =, in of SQL. 15. Explain foreign key with example.

3 LONG QUESTIONS: UNIT 1 1. Explain three level architecture of DBMS. 2. Write disadvantages of file processing system. 3. Explain types of relationship set with an ER diagram. 4. What is the purpose of mapping cardinality? Explain it with example 5. Give Architecture of DBMS. 6. Explain Data manager. 7. Object oriented data model. 8. Define DBMS.Explain structural architecture of DBMS. 9. What is DBA.how DBA can hide various level and kinds of complexity from database user. 10. Explain distinction among primary key, candidate key, super key, unique key and foreign key by giving example. 11. Explain the concept of key and their significance. 12. What is the inconsistent values problem? Include an example also. 13. Design a generalization specialization hierarchy for following: A number of employees are working for a college. Each employee is given unique emp_no when he/she joins the college on a particular date. The appointment can be of two types: (a) If the full time employee is a faculty ; he/she possesses some degree and is paid salary as per the monthly scale. Otherwise the employee is treated as administrative staff and works for designated post. (b) If the part time employee is teachers, they are given some stipend. Where as part time casual workers are given remuneration on hourly basis. 14. Design a generalization specialization hierarchy for following: Motor vehicle company sales motorcycles, cars, vans and buses. Each vehicle is having its own attributes and some vehicles share some common attributes based upon their types. 15. Explain DBMS levels. 16. Explain DDL & DML in detail. 17. Explain various kinds of integrity constraints. Also explain how we can implement them in DB. 18. Physical and data modeling. 19. Explain the relationship between entity, entity class, and entity instance. 20. Explain DDL and DML. 21. Explain Data independence. 22. Explain Generalization-specialization with all its constraints.

4 23. Explain all types of keys with example. 24. Explain the components of DBMS. 25. Explain binary and ternary relationship set with ER diagram. 26. Design a generalization specialization hierarchy for employees of a college. Explain it. 27. Design a generalization specialization hierarchy for different accounts of a bank. 28. Explain generalization, specialization & aggregation. 29. Explain domain & referential integrity. 30. Difference between network & relational model. 31. Explain Record based data models. 32. Explain duties (role) of DBA. 33. Difference between disjoint and overlapping constraints. UNIT 2 1. List and explain Armstrong axioms. 2. Is it possible that the relation is in BCNF but not in 3NF? Which one to choose between BCNF and 3NF? And why? The candidate key is part and ware_address attributes together,and FDs F = {part,warehouse->quantity,warehouse->ware_address} Identify type of each FD.identify in what normal form is this relation? Why? Decompose it into further normal form 3. Normalize the following relation up to third normal form (a) TEACHES (course, prof, room, room_capacity, enroll_limit) With the set of following FDs : Course->Room, prof, room_capacity, enroll_limit Room->Room_capacity Room_capacity->Enroll_limit (b) Worker data (name, age, manager, lodgename, address, skill, desc_of_skill, ability) With the set of following FDs; Name->age, lodgename, skill Name+skill->abilityDescribe FDs.Also explain in which NF the tables are present? 4. Define multivalued dependency. What kind of a problem it can create? Is it possible that a relation in BCNF contain multivalue dependency? How can we solve the problem arouse from multivalued dependency. 5. Consider the relation: Teachers (course,professor,room,roomcap,enroll_limit) i. FD= {course->room, professor, roomcap, enroll_limit,

5 ii. Room->room cap, iii. Room-> enroll_limit} Normalize it up to 3 rd normal form. 6. Explain trivial and non-trivial dependencies? Explain by providing appropriate example. 7. Not every BCNF decomposition is dependency preservation, justify the statement. 8. If you have to choose between BCNF and dependency preservation with 3NF, which one you choose & why? 9. Explain desirable properties of decomposition. 10. Explain functional dependency with its types. 11. Explain the concept of data decomposition & its significance. 12. What is purpose of normalization? Write a note on third normal form. 13. How to achieve BCNF? Explain the process of achieving. 14. What is purpose of normalization? Write a note on 1NF & 2NF form with example. 15. Write significance of normalization. What criteria one should keep in mind while performing decomposition and why? 16. Discuss the concept of decomposition? Explain the characteristics of decomposition. 17. Explain Multivalued dependencies. 18. Discuss process of normalisation.how the dependency can be prevented. 19. Explain loss less join decomposition. 20. Explain BCNF. 21. Consider the following relation: Grade_Report(stud_id,name,addr,major_sub,courseid,course_title,instructor_name,instructor_location, grade). Derive various functional dependencies and decompose grade_report into a set of 3NF relation 22. Consider the relation part supplier : Part_supplier (part_no, descr, vendor_name, address, unit_cost) List the functional dependencies in part_supplier and identify a candidate key.in what normal form is this relation?develop a set of 3NF relation from part_supplier 23. Write note on anomalies in DB during insertion, deletion, and updation. 24. Give difference between 3NF & BCNF. 25. How multivalued dependency is different from functional dependency?

6 UNIT 3 1. What do you mean by sub query, how it is executed. Explain it with an example. 2. How relationship can be set between tables in Ms-Access. Explain cascade update and cascade delete. 3. What are different data types in access? 4. What are the different field properties? 5. Explain referential integrity constraint. Explain unique key. Is (unique+not null) is same as primary key. 6. Explain operators of MS-Access. 7. How modification of data is performed in MS-Access. ENTITY- RELATIONSHIP (ER) DIAGRAM: 1. Construct the ER diagram of the application of shopping cart. in this customer opt for online shopping of different products and uses the shopping basket to purchase the selected items. 2. Draw ER for student registration system. 3. Construct the ER diagram for the track of the exploits of your favorite Sports team. You should store the matches played, the scores in each match, the players in each match, and individual player statistics for each match summary statistics should be modeled as derived attributes. 4. Construct the ER diagram on departmental store management system. 5. Construct an ER diagram for a university registrar s office. The office maintains data about each class, including the instructor, the enrollment, and the time & place of meetings. For each student_class pair, a grade is recorded. Document all assumptions that you make about the mapping constraints. 6. Construct an ER diagram that has a binary relationship between student and courses. Assume that only one relationship exists between a student and course_offering pair.also; represent marks that a student gets in different exam of a course. Represent it in tabular form. 7. A restaurant offers different items/dishes. A specific waiter looks after each table in the

7 restaurant. The final bill to client is charged based on items ordered by clients. Draw its ER diagram. 8. Construct the ER diagram for a car insurance company whose customers have one or more cars. Each car has associated with it number of accidents. Represent it in a tabular form. 9. Suppose universal bank has exactly one branch in various metropolitan cities across the country. One or more managers manage each branch. Every branch is having many employees and each employee works under exactly one manager. The bank maintains residential information and salary information for all the employee of all branches. 10. Draw ER diagram for universal bank.