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Exam : IBM 000-910
Title : Managing and Optimizing Informix Dynamic Server Databases


1. What are four vaild logical and relational operators that can be used with expression-based distribution?
A. AND
B. IN
C. D. >=
E. !=
F. MATCHES
Answer: ABCD

2. What is a chunk when using raw devices?
A. a contigous unit of disk space.
B. a dynamic unit of disk space.
C. a location in shared memory
D. a data table.
Answer: A

3. In which two situations would you use a round robin fragmentation strategy?
A. When all fragments must be scanned.
B. To create uneven data distributions.
C. When queries perform sequential scans and you have little information about the data being stored.
D. When tables are accessed with a high degress of selectivity.
Answer: AC

4. What is database administration NOT concerned with?
A. indexing
B. creating tables
C. accessing data
D. application building
Answer: D

5. Where are table spaces (tblspaces) created?
A. in dbspaces
B. in pages
C. in extents
D. in chunks
Answer: A

6. Which two types of fragmentation are allowed in a CREATE TABLE statement?
A. disk striping
B. dbspace
C. indexing
D. round robin
E. mirroring
F. tblspace
G. sorting
H. expression
Answer: DH

7. Disk space for a table is allocated in one or more units called what?
A. tblspaces
B. extents
C. blobs
D. chunks
Answer: B

8. Where is fragment information stored?
A. in th system catalog tables.
B. in the physical logs.
C. in the reserved pages.
D. in the first page of the database tblspace.
Answer: A

9. What is the system catalog?
A. A catalogoued set of index criteria.
B. A set of tables created by the administrator
C. A set of tables that manage the operating system
D. A set of tables that describe the structure of the dataabase.
Answer: A

10. With database logging, where are transaction records first placed?
A. in a temporary database table.
B. in the logical log buffer.
C. in the primary chunk
D. in the physical buffer.
Answer: B

11. Which two happen when the ALTER FRAGMENT statement is run?
A. Transaction logging, if present, is suspended.
B. The table is locked until the statement is completed.
C. The database is locked until the statement is completed.
D. For databases with logging, the statement executes as a single transaction.
Answer: BD

12. Which fragments an index by expression?
A. FRAGMENT BY EXPRESSION col_1
B. FRAGMENT BY EXPRESSION col_2 > = 10000 IN dbspace1
AND col_2 C. FRAGMENT BY EXPRESSION col_1 AND col_2 IN dbspace2
D. FRAGMENT BY EXPRESSION col = 20000 IN dbspace2
Answer: D

13. Which statement correctly changes the next extent size?
A. ALTER TABLE customer MODIFY NEXT SIZE 300
B. ALTER TABLE customer MODIFY NEXT EXTENT SIZE 300
C. ALTER TABLE customer MODIFY EXTENT SIZE 300
D. ALTER TABLE customer NEXT SIZE 300
Answer: A

14. Why is a hash function advantageous in an expression-based distribution?
A. Because it creates an even distribution of data.
B. Because it creates an uneven distribution of data.
C. Because it does not do expression testing.
D. Because it places all data in one dbspace.
Answer: AB