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NEW QUESTION 1
Consider the following four database design activities:
* 1 - Design user views.
* 2 
- Select a DBMS.
* 3 - Apply normalization.
* 4 - Determine entities.
Which choice shows the correct ordering of these activities, from first to last, by assigned numbers?
- A. 1, 2, 3, 4
- B. 3, 4, 1, 2
- C. 4, 1, 3, 2
- D. 4, 2, 3, 1
Answer: D
NEW QUESTION 2
The exhibit shows a table called Recreation Relation that relates a unique student identification number and a sports activity with a fee for participating in that activity. The Student_ID and Activity columns in the table are used together as a composite key. Which statement about the relation is correct?
- A. Activity_Fee is a determinant of Activity.
- B. Activity_Fee is partially dependent on the primary key.
- C. The table contains a transitive dependency.
- D. Activity_Fee is a determinant of Activity and Student_ID.
Answer: B
NEW QUESTION 3
Consider the table for an employee database shown in the exhibit. What is the cardinality of the table?
- A. 5
- B. 20
- C. 4
- D. 25
Answer: C
NEW QUESTION 4
Consider the following relations shown in the exhibit. Which of the following SQL statements would return the Customers2 relation from the Customers relation?
- A.
SELECT *FROM CustomersWHERE Satisfaction_Rate <= 80 OR Satisfaction_Rate >= 90; - B. SELECT *FROM CustomersWHERE Satisfaction_Rate IN (80 AND 90);
- C. SELECT *FROM CustomersWHERE Satisfaction_Rate >= 80 AND Satisfaction_Rate <= 89;
- D. SELECT *FROM Customers WHERE Satisfaction_Rate BETWEEN (80, 90);
Answer: C
NEW QUESTION 5
Which term describes the management of simultaneous transactions to prevent conflicts?
- A. Parallelism
- B. Serialization
- C. Database control
- D. Concurrency control
Answer: D
NEW QUESTION 6
The creation of intermediate entities occurs during the logical database design phase for an enterprise. It is used to resolve which types of relationships?
- A. One-to-many, complex, and recursive
- B. Complex, recursive, and many-to-many
- C. Redundant, recursive, and many-to-many
- D. One-to-many and one-to-one
Answer: B
NEW QUESTION 7
Consider the table shown in the exhibit. Which relational algebraic operation would return Row 3?
- A. Union
- B. Selection
- C. Projection
- D. Difference
Answer: B
NEW QUESTION 8
Consider the Orders relation shown in the exhibit. Which of the following SQL statements would replace the value in the Sales_Rep_No column with 110 everywhere that Sales_Rep_No 108 is listed?
- A. UPDATE Sales_Rep_No IN Orders SET(Sales_Rep_No = 110WHERE Sales_Rep_No = 108);
- B. UPDATE OrdersSET Sales_Rep_No = 110 WHERE Sales_Rep_No = 108;
- C. UPDATE OrdersSET Sales_Rep_No = 110;
- D. UPDATE OrdersWHERE Sales_Rep_No = 108 SET Sales_Rep_No = 110;
Answer: B
NEW QUESTION 9
Which term describes the rejoining of relations that have been decomposed?
- A. Normalization
- B. Denormalization
- C. Referential integrity
- D. Domain constraints
Answer: B
NEW QUESTION 10
Which of the following definitions best describes an entity?
- A. A single relation
- B. Data about data
- C. Data stored in a table column
- D. An item about which information is stored
Answer: D
NEW QUESTION 11
Consider the following SQL statement and the Orders relation shown in the exhibit:
What is the output of this SQL statement?
- A. [MISSING]
- B. [MISSING]
- C. [MISSING]
- D. [MISSING]
Answer: C
NEW QUESTION 12
Which component in the three-tier database architecture handles the data-processing and business logic?
- A. Thin client
- B. Fat client
- C. Database server
- D. Application server
Answer: D
NEW QUESTION 13
In which situation would the DBMS use a serial schedule to execute the transactions?
- A. Concurrent transactions read data from the same data structure.
- B. Concurrent transactions write data to different data structures.
- C. Concurrent transactions read or write the same data structure.
- D. Concurrent transactions read or write from different data structures.
Answer: C
Explanation:
NEW QUESTION 14
Your enterprise has reached the conceptual design phase for a database project. What is the desired goal at the end of this design phase?
- A. A set of normalized relations
- B. A reviewed entity-relationship (ER) model
- C. An entity-relationship (ER) model with no redundant data
- D. A set of denormalized relations
Answer: B
NEW QUESTION 15
Consider the relation shown in the exhibit. Which of the following SQL statements would properly add information for a new employee?
- A. INSERT INTO Employee VALUES(0005, Tim, Bogart, 03-15-77);
- B. INSERT INTO Employee(Emp_ID, First_Name, Last_Name, Birth_Date) VALUES(0004, Tim, Bogart, 03-15-77);
- C. INSERT INTO Employee(Emp_ID, First_Name, Last_Name, Birth_Date) VALUES(0005, Tim, Bogart, 03-05-77);
- D. INSERT INTO Employee(Emp_ID, First_Name, Last_Name, Birth_Date) VALUES(0005, Tim, Bogart, 03-05-77);
Answer: D
NEW QUESTION 16
Which process is used to prevent the current database operation from reading or writing a data item while that data item is being accessed by another operation?
- A. Lock
- B. Deadlock
- C. Timestamp
- D. Batch
Answer: A
NEW QUESTION 17
Consider the Orders relation shown in the exhibit. Which of the following SQL statements would return all complete tuples for order dates in 2002, arranged by amount from lowest to highest?
- A. SELECT *FROM OrdersWHERE Order_Date LIKE _02 ORDER BY Amount;
- B. SELECT (Order_Date, Amount) FROM OrdersWHERE Order_Date LIKE %02 ORDER BY Amount;
- C. SELECT *
FROM OrdersWHERE Order_Date LIKE _02 ORDER BY Order_No; - D. SELECT *FROM OrdersWHERE Order_Date LIKE %02 ORDER BY Amount;
Answer: D
NEW QUESTION 18
Consider the relation shown in the exhibit. Which of the following SQL statements would return a relation that excludes all customers with a Satisfaction_Rate of less than or equal to 80 unless the Sales_Office is located in Atlanta?
- A. SELECT *FROM CustomersWHERE Satisfaction_Rate > 80 OR Sales_Office = Atlanta;
- B. SELECT *FROM CustomersWHERE Satisfaction_Rate <= 80 AND Sales_Office = Atlanta;
- C. SELECT *FROM CustomersWHERE Satisfaction_Rate >= 80;
- D. SELECT *FROM CustomersWHERE Satisfaction_Rate >= 80 AND NOT Sales_Office = Atlanta;
Answer: A
NEW QUESTION 19
Which of the following occurs in a relation when records are added or removed?
- A. The number of domains changes.
- B. The attributes in the table change.
- C. The cardinality of the relation is fixed but the degree varies.
- D. The degree of the relation is fixed but the cardinality varies.
Answer: D
NEW QUESTION 20
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