2961336
Descripción
Test por renanvkas, actualizado hace más de 1 año
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Creado por Mª Carmen Ruiz Garcia
hace casi 9 años
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Copiado por ismael mesa domi
hace casi 9 años
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Copiado por renanvkas
hace casi 9 años
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Pregunta 1
Pregunta
If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of
the database?
Respuesta
-
4
-
8
-
16
-
32
Pregunta 2
Pregunta
Given the following DDL statement: CREATE TABLE sales (item CHAR(20)); If a DBA wishes to
increase the size of the ITEM column, which SQL statement needs to be used?
Respuesta
-
ALTER TABLE sales ADD COLUMN item CHAR(40);
-
ALTER TABLE sales ALTER COLUMN item CHAR(40);
-
ALTER TABLE sales MODIFY COLUMN item CHAR(40);
-
ALTER TABLE sales ALTER COLUMN item SET DATA TYPE CHAR(40);
Pregunta 3
Pregunta
Which DB2 object can be used to improve the execution performance of qualified SELECT statements?
Respuesta
-
Trigger
-
SQL Procedure
-
Sequence Object
-
Materialized Query Table
Pregunta 4
Pregunta
When is it appropriate to use a sequence?
Respuesta
-
When you want to control the order in which triggers are fired.
-
When you want to control the order in which stored procedures can be invoked.
-
When you want to automatically generate a numeric value that is not tied to any specific column or table.
-
When you want to automatically generate a numeric value for each row that is added to a specific table.
Pregunta 5
Pregunta
5.Which clause should be included in a ALTER TABLE statement to update a table definition with a new
column?
Respuesta
-
ADD COLUMN
-
ALTER COLUMN
-
APPEND COLUMN
-
RENAME COLUMN
Pregunta 6
Pregunta
Which object is a stored procedure defined into?
Respuesta
-
Table
-
Schema
-
Package
-
Database
Pregunta 7
Pregunta
Which action needs to be performed in order to complete the definition of an application-period temporal
table?
Respuesta
-
A transaction-start-id column must be defined for the table.
-
A history table must be defined and associated with the base table.
-
A BUSINESS_TIME period must be specified in a CREATE or ALTER of the table.
-
A unique index must be created that prevents overlapping of the BUSINESS_TIME period of the table.
Pregunta 8
Pregunta
What functionality allows users to perform a UNION operation between a DB2 table and an Oracle
view?
Respuesta
-
Oracle connect
-
Trusted context
-
Oracle federation
-
Distributed request
Pregunta 9
Pregunta
You have a business need to query DB2 10 and DB2 9 databases and you want to write an application
that can run on most platforms unchanged. Which interface would you use to achieve your goal?
Respuesta
-
CLI
-
XML
-
JDBC
-
RUBY
Pregunta 10
Pregunta
Which DB2 object is used to provide a logical grouping of other database objects?
Respuesta
-
Alias
-
Index
-
Schema
-
Collection
Pregunta 11
Pregunta
What are two valid objects that can be created in DB2? (Choose two.)
Respuesta
-
Tree
-
Node
-
Trigger
-
Contexts
-
Sequence
Pregunta 12
Pregunta
Which type of temporal table can be used to store only time-sensitive data?
Respuesta
-
Bitemporal
-
Time-period
-
System-period
-
Application-period
Pregunta 13
Pregunta
When an index is created for a table, where is the metadata for that index stored?
Respuesta
-
In the table definition
-
In the system catalog.
-
In the schema that the index resides in.
-
In the metadata of the table the index was created for.
Pregunta 14
Pregunta
Which product is used to customize execution environments for the purpose of controlling system
resources so that one department or service class does not overwhelm the system?
Respuesta
-
pureScale
-
Workload manager
-
Data partitioning feature
-
Self-tuning memory manager
Pregunta 15
Pregunta
What type of mechanism is a simple token value that is used to refer to a much bigger large object
(LOB)?
Respuesta
-
locator
-
pointer
-
address
-
reference
Pregunta 16
Pregunta
What type of large object (LOB) is used to store LOB data together with the formatted rows on data
pages, instead of in a separate LOB storage object?
Respuesta
-
inline
-
binary
-
internal
-
partitioned
Pregunta 17
Pregunta
What is the purpose of the Query Tuner?
Respuesta
-
To automatically capture and stop rogue queries.
-
To provide recommendations and analysis for tuning a single query.
-
To provide recommendations and analysis for tuning up to 100 queries.
-
To recommend indexes and to guide DBAs through the process of creating new indexes.
Pregunta 18
Pregunta
Which tool allows users to connect to a DB2 database using a wizard?
Respuesta
-
Control Center
-
IBM Data Studio
-
Universal Connection Expert
-
DB2 Connection Pool Manager
Pregunta 19
Pregunta
Which two activities indicate the need for a data warehouse? (Choose two.)
Respuesta
-
Confirm product inventory.
-
Monitor product availability.
-
Summarize sales by region.
-
Identify patterns for products sold in the last five years.
-
Associate one or more products with a purchase order.
Pregunta 20
Pregunta
What is the primary function of an Online Transaction Processing (OLTP) workload?
Respuesta
-
To combine data from multiple sources.
-
To discover hidden relationships in data.
-
To analyze large amounts of data to find patterns.
-
To make changes to a small number of records within a single transaction.
Pregunta 21
Pregunta
Which isolation level offers the greatest protection of data but provides the least amount of
concurrency?
Respuesta
-
Read Stability (RS)
-
Cursor Stability (CS)
-
Repeatable Read (RR)
-
Uncommitted Read (UR)
Pregunta 22
Pregunta
What factor influences lock escalation?
Respuesta
-
Table size
-
Buffer space
-
Number of locks
-
Available real storage
Pregunta 23
Pregunta
Which type of lock allows the lock owner and all concurrent applications to read, but not update, the
locked data?
Respuesta
-
Share (S)
-
Update (U)
-
Exclusive (X)
-
Intent Exclusive (IX)
Pregunta 24
Pregunta
Application APP_A is performing updates to table TAB1 using the cursor stability (CS) isolation level. If
application APP_B wants to retrieve all rows from table TAB1 without waiting for application APP_A to
finish making updates, what isolation level must application APP_B use?
Respuesta
-
Read Stability (RS)
-
Repeatable Read (RR)
-
Uncommitted Read (UR)
-
Cursor Stability (CS)
Pregunta 25
Pregunta
Which statement will prevent concurrent application processes from performing anything other than
read-only operations against a table named TAB1?
Respuesta
-
LOCK TABLE tab1 IN READ MODE
-
LOCK TABLE tab1 IN SHARE MODE
-
LOCK TABLE tab1 IN EXCLUSIVE MODE
-
LOCK TABLE tab1 IN READ-ONLY MODE
Pregunta 26
Pregunta
When is an INTENT EXCLUSIVE (IX) lock required?
Respuesta
-
When a transaction intends to read or change data.
-
When a transaction intends to change but not read data.
-
When a transaction intends to read but not change data.
-
When a transaction intends to change the system catalog.
Pregunta 27
Pregunta
What is the act of exchanging one lock an application holds on a resource for a more restrictive lock on
the same resource known as?
Respuesta
-
Lock escalation
-
Lock substitution
-
Lock switch/exchange
-
Lock conversion/promotion
Pregunta 28
Pregunta
What isolation level prevents dirty reads, nonrepeatable reads, and phantoms?
Respuesta
-
Read stability (RS)
-
Cursor stability (CS)
-
Repeatable read (RR)
-
Uncommitted read (UR)
Pregunta 29
Pregunta
Which operation normally does NOT require an exclusive lock?
Respuesta
-
BIND
-
DROP
-
GRANT
-
SELECT
Pregunta 30
Pregunta
When a COMMIT statement is executed, what happens?
Respuesta
-
All locks held on the database are automatically released.
-
Data stored in global temporary tables is automatically deleted.
-
Open cursors defined WITH HOLD are closed, but their data is retained.
-
The current transaction is terminated and a new transaction boundary is started.
Pregunta 31
Pregunta
Which command is used to back out a subset of database changes that have been made within a unit
of work?
Respuesta
-
COMMIT
-
ROLLBACK
-
COMMIT TO SAVEPOINT
-
ROLLBACK TO SAVEPOINT
Pregunta 32
Pregunta
An SQL function designed to convert temperatures from Fahrenheit to Celsius was created as follows:
CREATE FUNCTION conv_temp (IN temp_f FLOAT
RETURNS INTEGER
NO EXTERNALACTION
SPECIFIC convert_ftoc
RETURN INT ((temp_f -32)/1.8)
How can this function be used to convert average temperature (AVG_TEMP) data stored in a table called
CLIMATE_INFO?
Respuesta
-
CALL conv_temp(climate_info.avg_temp);
-
CALL convert_ftoc(climate_info.avg_temp);
-
SELECT conv_temp(avg_temp) FROM climate_info;
-
SELECT convert_ftoc(avg_temp) FROM climate_info;
Pregunta 33
Pregunta
If a table named MY_TAB contains 100 rows and the following statement is executed:
DELETE FROM (SELECT * FROM my_tab ORDER BY col1 DESC
FETCH FIRST 5 ROWS ONLY) AS tmp;
What will happen?
Respuesta
-
The last 5 rows in the table will be deleted.
-
The first 5 rows in the table will be deleted.
-
The statement will fail because a subquery cannot be used with a DELETE statement.
-
The statement will fail because a table name was not specified with the DELETE statement.
Pregunta 34
Pregunta
Given an EMPLOYEES table and a SALES table, a user wants to produce a list of all employees and
their associated revenue, even if no revenue exists. Which SQL statement will produce the desired list?
Respuesta
-
SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON employees.id = sales.emp_id
-
SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON sales.emp_id = employees.id
-
SELECT employees.name, sales.revenue FROM sales LEFT OUTER JOIN employees ON employees.id = sales.emp_id
-
SELECT employees.name, sales.revenue FROM sales RIGHT OUTER JOIN employees ON employees.id = sales.emp_id
Pregunta 35
Pregunta
Which two operations are allowed in the body of an SQL scalar user-defined function? (Choose two.)
Respuesta
-
CALL statements.
-
External file access.
-
Use of a scratch pad.
-
COMMIT statements.
-
SQL control statements.
Pregunta 36
Pregunta
Which command will delete all rows from a table without generating log records?
Respuesta
-
TRIM
-
DROP
-
DELETE
-
TRUNCATE
Pregunta 37
Pregunta
Which function can be used to obtain values from XML documents that are to be inserted into one or
more tables?
Respuesta
-
XMLTABLE
-
XMLPARSE
-
XMLEXISTS
-
XMLATTRIBUTES
Pregunta 38
Pregunta
User USER1 wants to retrieve records from a table named EMPLOYEE that satisfy at least one of the
following criteria:
-The employee's hire date (HIREDATE) is before 1999 and the employee's salary (SALARY) is less than
$40,000.00 a year. -The employee has attended university
Which SQL statement will accomplish this?
Respuesta
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000) OR (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01') OR (salary < 40000) OR (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' OR (salary < 40000 AND (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000 AND (education ='University')
Pregunta 39
Pregunta
Which SQL statement will retrieve the employee number (EMPNO), hire date (HIREDATE), and salary
(SALARY) for each employee from a table named EMPLOYEE who was hired before 1998 and earns a
salary of less than $35,000.00 per year?
Respuesta
-
SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' AND salary < 35000
-
SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' AND salary < 35000
-
SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' OR salary < 35000
-
SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' OR salary < 35000
Pregunta 40
Pregunta
If the following result set is desired:
Which SQL statement must be executed?
Respuesta
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWS ONLY
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5 ROWS ONLY
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWS
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5 ROWS
Pregunta 41
Pregunta
Which statement about INSERT operations is true?
Respuesta
-
The INSERT statement is used to insert rows into a table, view, or table function.
-
Inserted values must satisfy the conditions of any check constraints defined on the table.
-
If an INSERT statement omits any column from the inserted row that is defined as NULL or NOT NULL WITH DEFAULT, the statement will fail.
-
If the underlying table of a view being referenced by an INSERT statement has one or more unique indexes, each row inserted does not have to conform to the constraints imposed by those indexes.
Pregunta 42
Pregunta
Which statement about application-period temporal tables is true?
Respuesta
-
Consists of explicitly-supplied timestamps and a separate associated history table.
-
Is based on explicitly-supplied timestamps that define the time periods during which data is valid.
-
Is useful when one wants to keep both user-based period information and system-based historical information.
-
Consists of a pair of columns with database-manager maintained values that indicate the period when a row is current.
Pregunta 43
Pregunta
Which SQL statement should be used to select the minimum and maximum salaries (SALARY), by job
code (JOB), from a table EMPLOYEE?
Respuesta
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee ORDER BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job, MIN(salary), MAX(salary);
-
SELECT JOB, MIN(salary), MAX(salary) FROM employee ORDER BY job, MIN(salary), MAX(salary);
Pregunta 44
Pregunta
In a trusted context environment, if a switch request is made with an authorization ID that is not
allowed on a trusted connection, what state is the connection placed in?
Respuesta
-
Locked
-
Waiting
-
Pending
-
Unconnected
Pregunta 45
Pregunta
If a user has been granted SYSCTRL authority, which activities can they perform?
Respuesta
-
Load operations
-
Backup/copy table spaces
-
Create and drop databases
-
Monitor database performance
Pregunta 46
Pregunta
What is the purpose of a role?
Respuesta
-
To define exactly what a specific user can do within a particular database once they have been authenticated.
-
To group a collection of privileges together so that they can be simultaneously granted to and revoked from multiple users.
-
To establish a credible relationship between DB2 and an external entity, such as a database administrator or a middleware server.
-
To group a collection of users together so that they can be simultaneously granted and revoked specific authorities and privileges.
Pregunta 47
Pregunta
Which SQL statement will give user USER1 the ability to assign a comment to a sequence named
MYSEQ?
Respuesta
-
GRANT ALTER ON SEQUENCE myseq TO user1
-
GRANT USAGE ON SEQUENCE myseq TO user1
-
GRANT SELECT ON SEQUENCE myseq TO user1
-
GRANT COMMENT ON SEQUENCE myseq TO user1
Pregunta 48
Pregunta
A column mask that is to be used for row and column access control (RCAC) was created with the
DISABLE option specified. What must be done if this mask is to be used to restrict access to data stored
in a table named EMPLOYEE?
Respuesta
-
The column mask must be enabled; the EMPLOYEE table must be altered to activate column access control.
-
The column mask must be enabled (column access control for the EMPLOYEE table will be activated automatically).
-
The EMPLOYEE table must be altered to activate column access control (the column mask will be enabled automatically).
-
The EMPLOYEE table must be altered to activate column access control; row permission must be granted to everyone who needs to use thecolumn mask.
Pregunta 49
Pregunta
User USER1 holds both DBADM and SECADM authority and you want to separate database
administration activities from security administration tasks. What authority must you have in order to
revoke SECADM authority from user USER1 and assign it to someone else?
Respuesta
-
DBADM
-
DBCTRL
-
SECADM
-
DBMAINT
Pregunta 50
Pregunta
A table named EMPLOYEE was created as follows:
Which action will prevent unauthorized users from accessing SSN data?
Respuesta
-
Assign the SSN column to a restricted role that only authorized users can access.
-
Only grant ACCESSCTRL authority for the SSN column to users who need to access SSN data.
-
Alter the table definition so that SSN data is stored in a separate schema that only authorized users can access.
-
Create a view for the EMPLOYEE table that does not contain the SSN column and require unauthorized users to use the view.
Pregunta 51
Pregunta
Which SQL statement will allow user USER1 to create a view on a table named EMPLOYEE?
Respuesta
-
GRANT CREATETAB ON DATABASE TO user1
-
GRANT SELECT ON TABLE employee TO user1
-
GRANT CREATEVIEW ON DATABASE TO user1
-
GRANT REFERENCES ON TABLE employee TO user1
Pregunta 52
Pregunta
A new user named USER1 needs to retrieve information from a database named MYDB. What
authority must be granted to user USER1?
Respuesta
-
DBCTRL authority
-
SQLADM authority
-
DATAACCESS authority
-
ACCESSCTRL authority
Pregunta 53
Pregunta
Which privilege is required to invoke a user defined function?
Respuesta
-
CALL
-
USAGE
-
EXECUTE
-
REFERENCES
Pregunta 54
Pregunta
Which statement is true about an index that is used to support a UNIQUE constraint?
Respuesta
-
It must not contain more than one column.
-
It cannot be used in a referential constraint.
-
It must be defined with the UNIQUE attribute.
-
It must be defined as UNIQUE WHERE NOT NULL.
Pregunta 55
Pregunta
Which statement regarding triggers is true?
Respuesta
-
Only one INSERT, UPDATE, or DELETE trigger can be defined per table.
-
Triggers cannot be modified, they must be dropped and recreated with new definitions.
-
Adding a trigger to a table that already has rows in it will cause triggered actions to be fired.
-
Triggers can only be fired one time per statement irrespective of the number of rows affected.
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