This download link is referred from the post: JNTUH MCA 3rd Sem Last 10 Years 2023-2013 Question Papers R20-R09 || Jawaharlal nehru technological university
Code No: 843AA
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
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R17
MCA III Semester Examinations, February - 2021
DATABASE MANAGEMENT SYSTEMS
Time: 2 hours Max.Marks:75
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Answer any five questions
All questions carry equal marks
- a) Discuss the Entity-Relationship Model. Explain with suitable examples.
b) Compare and contrast the DDL and DML. [8+7] - a) Explain the following:
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a) Null values
b) Outer joins
c) Triggers [5+5+5] - a) How do you develop Security and authorization with SQL? Explain.
b) Write a short note on logical connectivity. [7+8] - Describe the set operations of relational algebra, including union (U), set difference (-) and cross-product (X). For each, what can you say about the cardinality of their input and output tables? [15]
- Briefly explain the properties of decompositions in detail. [15]
- a) Define transaction. Explain the state diagram of a transaction in detail.
b) What is serializability? Explain. [7+8] - Discuss two-phase lock based protocol and time-stamped protocol and compare them with suitable examples. [15]
- a) How does a B+ tree index handle the search, insert and delete?
b) Explain the primary indexing and secondary indexing. [7+8]
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This download link is referred from the post: JNTUH MCA 3rd Sem Last 10 Years 2023-2013 Question Papers R20-R09 || Jawaharlal nehru technological university