Ejemplo_1

Question 1 of 55

1

If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of
the database?

Select one or more of the following:

4
8
16
32

Explanation

Question 2 of 55

1

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?

Select one or more of the following:

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);

Explanation

Question 3 of 55

1

Which DB2 object can be used to improve the execution performance of qualified SELECT statements?

Select one or more of the following:

Trigger
SQL Procedure
Sequence Object
Materialized Query Table

Explanation

Question 4 of 55

1

When is it appropriate to use a sequence?

Select one or more of the following:

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.

Explanation

Question 5 of 55

1

5.Which clause should be included in a ALTER TABLE statement to update a table definition with a new
column?

Select one or more of the following:

ADD COLUMN
ALTER COLUMN
APPEND COLUMN
RENAME COLUMN

Explanation

Question 6 of 55

1

Which object is a stored procedure defined into?

Select one or more of the following:

Table
Schema
Package
Database

Explanation

Question 7 of 55

1

Which action needs to be performed in order to complete the definition of an application-period temporal
table?

Select one or more of the following:

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.

Explanation

Question 8 of 55

1

What functionality allows users to perform a UNION operation between a DB2 table and an Oracle
view?

Select one or more of the following:

Oracle connect
Trusted context
Oracle federation
Distributed request

Explanation

Question 9 of 55

1

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?

Select one or more of the following:

CLI
XML
JDBC
RUBY

Explanation

Question 10 of 55

1

Which DB2 object is used to provide a logical grouping of other database objects?

Select one or more of the following:

Alias
Index
Schema
Collection

Explanation

Question 11 of 55

1

What are two valid objects that can be created in DB2? (Choose two.)

Select one or more of the following:

Tree
Node
Trigger
Contexts
Sequence

Explanation

Question 12 of 55

1

Which type of temporal table can be used to store only time-sensitive data?

Select one or more of the following:

Bitemporal
Time-period
System-period
Application-period

Explanation

Question 13 of 55

1

When an index is created for a table, where is the metadata for that index stored?

Select one or more of the following:

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.

Explanation

Question 14 of 55

1

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?

Select one or more of the following:

pureScale
Workload manager
Data partitioning feature
Self-tuning memory manager

Explanation

Question 15 of 55

1

What type of mechanism is a simple token value that is used to refer to a much bigger large object
(LOB)?

Select one or more of the following:

locator
pointer
address
reference

Explanation

Question 16 of 55

1

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?

Select one or more of the following:

inline
binary
internal
partitioned

Explanation

Question 17 of 55

1

What is the purpose of the Query Tuner?

Select one or more of the following:

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.

Explanation

Question 18 of 55

1

Which tool allows users to connect to a DB2 database using a wizard?

Select one or more of the following:

Control Center
IBM Data Studio
Universal Connection Expert
DB2 Connection Pool Manager

Explanation

Question 19 of 55

1

Which two activities indicate the need for a data warehouse? (Choose two.)

Select one or more of the following:

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.

Explanation

Question 20 of 55

1

What is the primary function of an Online Transaction Processing (OLTP) workload?

Select one or more of the following:

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.

Explanation

Question 21 of 55

1

Which isolation level offers the greatest protection of data but provides the least amount of
concurrency?

Select one or more of the following:

Read Stability (RS)
Cursor Stability (CS)
Repeatable Read (RR)
Uncommitted Read (UR)

Explanation

Question 22 of 55

1

What factor influences lock escalation?

Select one or more of the following:

Table size
Buffer space
Number of locks
Available real storage

Explanation

Question 23 of 55

1

Which type of lock allows the lock owner and all concurrent applications to read, but not update, the
locked data?

Select one or more of the following:

Share (S)
Update (U)
Exclusive (X)
Intent Exclusive (IX)

Explanation

Question 24 of 55

1

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?

Select one or more of the following:

Read Stability (RS)
Repeatable Read (RR)
Uncommitted Read (UR)
Cursor Stability (CS)

Explanation

Question 25 of 55

1

Which statement will prevent concurrent application processes from performing anything other than
read-only operations against a table named TAB1?

Select one or more of the following:

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

Explanation

Question 26 of 55

1

When is an INTENT EXCLUSIVE (IX) lock required?

Select one or more of the following:

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.

Explanation

Question 27 of 55

1

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?

Select one or more of the following:

Lock escalation
Lock substitution
Lock switch/exchange
Lock conversion/promotion

Explanation

Question 28 of 55

1

What isolation level prevents dirty reads, nonrepeatable reads, and phantoms?

Select one or more of the following:

Read stability (RS)
Cursor stability (CS)
Repeatable read (RR)
Uncommitted read (UR)

Explanation

Question 29 of 55

1

Which operation normally does NOT require an exclusive lock?

Select one or more of the following:

BIND
DROP
GRANT
SELECT

Explanation

Question 30 of 55

1

When a COMMIT statement is executed, what happens?

Select one or more of the following:

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.

Explanation

Question 31 of 55

1

Which command is used to back out a subset of database changes that have been made within a unit
of work?

Select one or more of the following:

COMMIT
ROLLBACK
COMMIT TO SAVEPOINT
ROLLBACK TO SAVEPOINT

Explanation

Question 32 of 55

1

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?

Select one or more of the following:

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;

Explanation

Question 33 of 55

1

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?

Select one or more of the following:

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.

Explanation

Question 34 of 55

1

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?

Select one or more of the following:

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

Explanation

Question 35 of 55

1

Which two operations are allowed in the body of an SQL scalar user-defined function? (Choose two.)

Select one or more of the following:

CALL statements.
External file access.
Use of a scratch pad.
COMMIT statements.
SQL control statements.

Explanation

Question 36 of 55

1

Which command will delete all rows from a table without generating log records?

Select one or more of the following:

TRIM
DROP
DELETE
TRUNCATE

Explanation

Question 37 of 55

1

Which function can be used to obtain values from XML documents that are to be inserted into one or
more tables?

Select one or more of the following:

XMLTABLE
XMLPARSE
XMLEXISTS
XMLATTRIBUTES

Explanation

Question 38 of 55

1

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?

Select one or more of the following:

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')

Explanation

Question 39 of 55

1

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?

Select one or more of the following:

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

Explanation

Question 40 of 55

1

If the following result set is desired:

Which SQL statement must be executed?

Select one or more of the following:

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

Explanation

Question 41 of 55

1

Which statement about INSERT operations is true?

Select one or more of the following:

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.

Explanation

Question 42 of 55

1

Which statement about application-period temporal tables is true?

Select one or more of the following:

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.

Explanation

Question 43 of 55

1

Which SQL statement should be used to select the minimum and maximum salaries (SALARY), by job
code (JOB), from a table EMPLOYEE?

Select one or more of the following:

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);

Explanation

Question 44 of 55

1

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?

Select one or more of the following:

Locked
Waiting
Pending
Unconnected

Explanation

Question 45 of 55

1

If a user has been granted SYSCTRL authority, which activities can they perform?

Select one or more of the following:

Load operations
Backup/copy table spaces
Create and drop databases
Monitor database performance

Explanation

Question 46 of 55

1

What is the purpose of a role?

Select one or more of the following:

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.

Explanation

Question 47 of 55

1

Which SQL statement will give user USER1 the ability to assign a comment to a sequence named
MYSEQ?

Select one or more of the following:

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

Explanation

Question 48 of 55

1

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?

Select one or more of the following:

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.

Explanation

Question 49 of 55

1

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?

Select one or more of the following:

DBADM
DBCTRL
SECADM
DBMAINT

Explanation

Question 50 of 55

1

A table named EMPLOYEE was created as follows:

Which action will prevent unauthorized users from accessing SSN data?

Select one or more of the following:

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.

Explanation

Question 51 of 55

1

Which SQL statement will allow user USER1 to create a view on a table named EMPLOYEE?

Select one or more of the following:

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

Explanation

Question 52 of 55

1

A new user named USER1 needs to retrieve information from a database named MYDB. What
authority must be granted to user USER1?

Select one or more of the following:

DBCTRL authority
SQLADM authority
DATAACCESS authority
ACCESSCTRL authority

Explanation

Question 53 of 55

1

Which privilege is required to invoke a user defined function?

Select one or more of the following:

CALL
USAGE
EXECUTE
REFERENCES

Explanation

Question 54 of 55

1

Which statement is true about an index that is used to support a UNIQUE constraint?

Select one or more of the following:

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.

Explanation

Question 55 of 55

1

Which statement regarding triggers is true?

Select one or more of the following:

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.

	Created by Mª Carmen Ruiz Garcia almost 9 years ago

	Copied by ismael mesa domi almost 9 years ago

	Copied by renanvkas almost 9 years ago

Quiz on Ejemplo_1, created by renanvkas on 17/06/2015.

Question 1 of 55

If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of the database?

Select one or more of the following:

Explanation

Question 2 of 55

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?

Select one or more of the following:

Explanation

Question 3 of 55

Which DB2 object can be used to improve the execution performance of qualified SELECT statements?

Select one or more of the following:

Explanation

Question 4 of 55

When is it appropriate to use a sequence?

Select one or more of the following:

Explanation

Question 5 of 55

5.Which clause should be included in a ALTER TABLE statement to update a table definition with a new column?

Select one or more of the following:

Explanation

Question 6 of 55

Which object is a stored procedure defined into?

Select one or more of the following:

Explanation

Question 7 of 55

Which action needs to be performed in order to complete the definition of an application-period temporal table?

Select one or more of the following:

Explanation

Question 8 of 55

What functionality allows users to perform a UNION operation between a DB2 table and an Oracle view?

Select one or more of the following:

Explanation

Question 9 of 55

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?

Select one or more of the following:

Explanation

Question 10 of 55

Which DB2 object is used to provide a logical grouping of other database objects?

Select one or more of the following:

Explanation

Question 11 of 55

What are two valid objects that can be created in DB2? (Choose two.)

Select one or more of the following:

Explanation

Question 12 of 55

Which type of temporal table can be used to store only time-sensitive data?

Select one or more of the following:

Explanation

Question 13 of 55

When an index is created for a table, where is the metadata for that index stored?

Select one or more of the following:

Explanation

Question 14 of 55

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?

Select one or more of the following:

Explanation

Question 15 of 55

What type of mechanism is a simple token value that is used to refer to a much bigger large object (LOB)?

Select one or more of the following:

Explanation

Question 16 of 55

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?

Select one or more of the following:

Explanation

Question 17 of 55

What is the purpose of the Query Tuner?

Select one or more of the following:

Explanation

Question 18 of 55

Which tool allows users to connect to a DB2 database using a wizard?

Select one or more of the following:

Explanation

Question 19 of 55

Which two activities indicate the need for a data warehouse? (Choose two.)

Select one or more of the following:

Explanation

Question 20 of 55

What is the primary function of an Online Transaction Processing (OLTP) workload?

If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of
the database?

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?

5.Which clause should be included in a ALTER TABLE statement to update a table definition with a new
column?

Which action needs to be performed in order to complete the definition of an application-period temporal
table?

What functionality allows users to perform a UNION operation between a DB2 table and an Oracle
view?

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?

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?

What type of mechanism is a simple token value that is used to refer to a much bigger large object
(LOB)?

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?

Which isolation level offers the greatest protection of data but provides the least amount of
concurrency?

Which type of lock allows the lock owner and all concurrent applications to read, but not update, the
locked data?

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?

Which statement will prevent concurrent application processes from performing anything other than
read-only operations against a table named TAB1?

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?

Which command is used to back out a subset of database changes that have been made within a unit
of work?

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?

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?

Which function can be used to obtain values from XML documents that are to be inserted into one or
more tables?