Database problems
- 1. ON UPDATE CASCADE ensures which of the following?
Options- A. Normalization
- B. Data Integrity
- C. Materialized Views
- D. All of the above. Discuss
Correct Answer: Data Integrity
- 2. A DBMS that combines a DBMS and an application generator is ________ .
Options- A. Microsoft's SQL Server
- B. Microsoft's Access
- C. IBM's DB2
- D. Oracle Corporation's Oracle Discuss
Correct Answer: Microsoft's Access
- 3. A goal of data mining includes which of the following?
Options- A. To explain some observed event or condition
- B. To analyze data for expected relationships
- C. To confirm that data exists
- D. To create a new data warehouse Discuss
Correct Answer: To explain some observed event or condition
- 4. ________ is an open source DBMS product that runs on UNIX, Linux and Windows.
Options- A. MySQL
- B. JSP/SQL
- C. JDBC/SQL
- D. Sun ACCESS Discuss
Correct Answer: MySQL
- 5. Which of the following is the original purpose of SQL?
Options- A. To specify the syntax and semantics of SQL data definition language
- B. To specify the syntax and semantics of SQL manipulation language
- C. To define the data structures
- D. All of the above. Also asked in: Analyst, Database Administrator, IT Trainer
Correct Answer: All of the above.
Explanation:
SQL is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.
Purpose of SQL are ::
* To define the data structures
* To specify the syntax and semantics of SQL manipulation language
* To specify the syntax and semantics of SQL data definition language
- 6. If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
Options- A. First normal form
- B. Second normal form
- C. Third normal form
- D. Fourth normal form Discuss
Correct Answer: Second normal form
- 7. For what purposes are views used?
Options- A. To hide rows only
- B. To hide columns only
- C. To hide complicated SQL statements only
- D. All of the above are uses for SQL views. Discuss
Correct Answer: All of the above are uses for SQL views.
- 8. What are the notations used in Evaluation of Arithmetic Expressions using prefix and postfix forms?
Options- A. Polish
- B. Reverse Polish
- C. Both A and B
- D. None of the above Also asked in: Database Administrator
Correct Answer: Both A and B
Explanation:
Polish and Reverse Polish are the notations used in Evaluation of Arithmetic Expressions using prefix and postfix forms
- 9. The different classes of relations created by the technique for preventing modification anomalies are called:
Options- A. normal forms.
- B. functional dependencies.
- C. referential integrity constraints.
- D. None of the above is correct. Discuss
Correct Answer: normal forms.
- 10. The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T ;
Options- A. Equi-join
- B. Natural join
- C. Outer join
- D. Cartesian join Discuss
Correct Answer: Cartesian join
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