INF3703 MCQ ELABORATIONS QUESTIONS & ANSWERS

INF3703/201

2. _______ has been enhanced with extensions that support OLAP type
processing and data generation.
[1] SQL
[2] DBMS
[3] DBLC
[4] SDLC.




3. Data stored in the company database must be protected from access by
unauthorized users. Data measures include all of the following EXCEPT….
[1] User authentication
[2] Physical security
[3] Data encryption
[4] Top down authentication




4. The following is NOT a factor that influences the choice of database design
strategies.
[1] The company’s market knowledge
[2] The company’s structure
[3] The company’s scope
[4] The company’s management style




5. What describes the extent to which modules are independent of one another?
[1] Module cohesivity
[2] Module coupling
[3] Module collaboration
[4] Module connectivity




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6. What are the three main types of indexes?
[1] Primary, Secondary, and Mixed index
[2] Primary, Secondary, and Multi-level index
[3] Primary, Secondary, and Maintenance index
[4] Primary, Secondary, and Mandatory index




7. The ____ lock allows concurrent transactions to access the same row as long
as they require the use of different fields within that row.
[1] Table-level
[2] Page-level
[3] Row-level
[4] Field-level




8. The following are the deadlock control techniques.
[1] Prevention, avoidance and uniqueness
[2] Prevention, detection and avoidance
[3] Prevention, isolation and detection
[4] Prevention, time-stamping and avoidance




9. Concurrency control with optimistic methods moves through which phases?
[1] Read, validation and growing
[2] Read, write and growing
[3] Growing, write and shrinking
[4] Validation, write and read




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10. _____________design is the process of selecting the data storage and data
access characteristics of the database.
[1] Time
[2] Network
[3] Logical
[4] Physical




11. In the ________________ stage, data modeling is used to create an abstract
database structure that represents real-world objects in the most realistic way
possible.
[1] Physical design
[2] ER verification
[3] Conceptual design
[4] Logical design




12. What is the first step in converting the ER model from the conceptual design
phase into a set of relations?
[1] Create Relations for Strong Entities
[2] Map multivalued attributes
[3] Create Relations for Weak Entities
[4] Map binary relations




13. A ______ is often used on multidimensional data held in data warehouses.
[1] Bitmap index
[2] B-tree
[3] Pashing algorithm
[4] Primary index




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14. In the following relation, what is the primary key?
RENT_LINE (RENT_NUM*, RENT_LINE_NUM*, RENT_LINE_CHARGE, DATE,
COPY_CODE*).
[1] RENT_NUM
[2] RENT_LINE_NUM
[3] RENT_NUM and RENT_LINE_NUM
[4] RENT_NUM, RENT_LINE_NUM and COPY_CODE




15. ______ is a brief and precise narrative description of a policy, procedure or
principle within a specific organization’s environment.
[1] End-user brief
[2] Operational description
[3] Conceptual model
[4] Business rule




16. Indexes should NOT be used when_______
[1] Tables have low sparsity
[2] Tables have high sparsity
[3] Attributes appear often in the WHERE clause
[4] Using joints




17. If several concurrent transactions are executed over the same data set and the
second transaction updates the database before the first transaction is
finished, the ____ property is violated and the database is no longer consistent.
[1] Atomicity
[2] Consistency
[3] Durability
[4] Isolation



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