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1481-C2090-558: Informix 11.70 Fundamentals
#Question
What is a common benefit of indexing in Informix databases?
A.Slower queries
B.Reduced data integrity
C.Faster data retrieval
D.Increased storage usage
Correct Answer:
C
Indexing significantly speeds up data retrieval operations, reducing response times for queries.
#Question
When is the best time to run database maintenance tasks in Informix?
A.During peak hours
B.After user input
C.During data recovery
D.When the database is idle
Correct Answer:
D
Database maintenance tasks should be performed during periods of low activity to minimize interruption.
#Question
Which command is used to create a new view in Informix?
A.BUILD VIEW
B.ADD VIEW
C.DISPLAY VIEW
D.CREATE VIEW
Correct Answer:
D
The CREATE VIEW command is used to define a new view based on a SELECT statement.
#Question
In an SQL query, what does the JOIN clause do?
A.Deletes records
B.Returns unique values
C.Merges tables based on a relationship
D.Sorts data
Correct Answer:
C
The JOIN clause merges rows from two or more tables based on a related column between them.
#Question
What is the effect of granting SELECT permission on a table to a user?
A.User can delete data
B.User can insert data
C.User can modify data
D.User can view data
Correct Answer:
D
Granting SELECT permission allows the user to view data within a specified table without modifying it.
#Question
How does Informix handle multi-version concurrency control (MVCC)?
A.By locking records
B.By allowing stale reads
C.By storing multiple copies
D.By creating replicas
Correct Answer:
B
MVCC allows transactions to read a snapshot of data, enabling concurrent access without blocking.
#Question
When would you use a cursor in Informix?
A.For batch updates
B.To iterate over query results
C.To drop indexes
D.To create tables
Correct Answer:
B
Cursors are used to iterate over a set of query results row by row in Informix.
1481-C2090-558: Informix 11.70 Fundamentals
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