actualtests ibm c2090-560 - gratis exam ibm c2090-560 number ... the pure data system for analytics...

Actualtests IBM C2090-560

Number: C2090-560Passing Score: 800Time Limit: 120 minFile Version: 15.0

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Exam code: IBM C2090-560

Exam name: PureData System for Analytics v7.1

Version 15.0

Exam A

QUESTION 1When using a CREATE TABLE statement, constraints can be specified at the column level. Which twoconstraints are NOT automatically enforced via the database? (Choose two.)

A. NULLB. UNIQUEC. NOT NULLD. RIMARY KEYE. DEFAULT value

Correct Answer: BDSection: (none)Explanation

Explanation/Reference:

QUESTION 2What is the host Linux file that must be modified to permanently adjust optimizer settings such as enablingschema support?

A. /nz/data/postgresql.confB. /nz/data/config/system.cfgC. /nz/kit/sys/initTopology.cfgD. /nz/kit/log/sysmgr/sysmgr.log

Correct Answer: ASection: (none)Explanation


QUESTION 3What columns contain row count information in the system tables? (Choose two.)

A. STAHIVALB. RELREFSC. STALOVALD. RELTUPLESE. ATTDISPERSION

Correct Answer: BESection: (none)Explanation


QUESTION 4What mechanism does NPS use for LDAP authentication?

A. Pluggable Authentication Module (PAM)B. Generic Security Services API (GSSAPI)C. Simple Authentication and Security Layer (SASL)D. Berkeley Software Distribution Authentication (BSDAuth)



QUESTION 5The Pure Data System for Analytics implements which level of transaction isolation?


A. SerializableB. Committed readC. Repeatable readD. Uncommitted read



QUESTION 6What is the maximum number of columns you can choose as organizing keys for a clustered base table?

A. 1B. 2C. 4D. 8

Correct Answer: CSection: (none)Explanation


QUESTION 7Which of the following is NOT true about the createxid column?

A. They can be queriedB. They are updated to zero during a DELETE operationC. Rows loaded in a transaction are assigned the same valueD. They contain the ID of the transaction that created the record

Correct Answer: DSection: (none)Explanation


QUESTION 8What is nzconvert used for?

A. To convert compressed external tables into ASCII textB. To convert between character encodings before loading dataC. To translate stored procedures into NZPLSOL compatible syntaxD. To upgrade/downgrade the database to a different software version

Correct Answer: BSection: (none)Explanation


QUESTION 9Dirty reads occur when a transaction reads data that is written by concurrentuncommitted transactions.Under what conditions are dirty reads allowed on the IBM PDA system?

A. When an FPGA is busyB. By turning off serialization within the systemC. They are never permitted under any conditionsD. When the transaction isolation is read-committed



QUESTION 10What can be backed up using the nzbackup utility?

A. Host dataB. pg.log filesC. Temporary tablesD. User permissions



QUESTION 11Which of the following will NOT show the current sessions on the Netezza server?

A. nzsql\actB. nzsessionC. nzsystem-showSessionsD. SELECT* FROM_v_session



QUESTION 12Which of the following is NOT performed by the nzhw utility?

A. It shows the current storage topologyB. It shows the role of each component in the applianceC. It shows the location of each component in the applianceD. It shows the hardware ID of each component in the appliance



QUESTION 13Which statement about external tables is TRUE?

A. Materialized views can be created for external tablesB. External table data is deleted using the DELETE statementC. The GENERATE STATISTICS command can be run against external tablesD. External tables can be used to unload data to a Microsoft Windows directory



QUESTION 14Which file format is NOT supported by the nzload utility?

A. ASCII delimited formatB. Fixed length record formatC. gzip compressed file formatD. Pure Data System for Analytics compressed file format



QUESTION 15Which of the following is a valid data type definition?

A. TEXTB. CLOBC. CHAR(128000)D. NUMERIC(38,1)



QUESTION 16Which of the following is TRUE regarding distribution keys?

A. Up to 4 columns can be specified for a distribution key on a tableB. The distribution key cannot be changed on a given table once that table is createdC. Rows with the same distribution key value are stored on the same data sliceD. All of the above



QUESTION 17Which log directories will record system state changes? (Choose two)

A. /nz/kit/log/bnrmgrB. /nz/kit/log/sysmgrC. /nz/kit/log/fcommtxD. /nz/kit/log/eventmgrE. /nz/kit/log/sessionmgr

Correct Answer: BCSection: (none)Explanation


QUESTION 18What will prevent a GROOM TABLE command from running on a table?

A. There are active materialized views on the tableB. There are active selects running against the tableC. There are active nzloads running against the tableD. There are active updates running against the table



QUESTION 19The DBA created and loaded the table CUSTOMER as follows:

Please refer to the excerpt (highlighted in bold) of a successful query execution plan which used theCUSTOMER table.

Which of the following statements is TRUE?

A. The FPGA cannot restrict columns declared as CHAR(7)B. The FPGA can only restrict columns which are distribution columnsC. The FPGA can directly compute the result of the table predicate while reading the rowsD. The FPGA cannot compute the result of the table predicate for varying character columns



QUESTION 20Which of the following criteria can be limited for active plans? (Choose two.)


A. UserB. RulesC. RuntimeD. Memory allocationE. Resource group priority

Correct Answer: ADSection: (none)Explanation


QUESTION 21What is the maximum factor that page granular zone maps can improve performance over extent- basedzone maps?

A. 8 timesB. 16 timesC. 24 timesD. 48 times



QUESTION 22Why should Boolean data types be avoided when selecting a distribution key for a table?

A. The table will not broadcastB. The table will be highly skewedC. The table is likely to be evenly spread across data slicesD. The table will not join to other tables unless both tables have a Boolean column



QUESTION 23

Which command will backup users and groups on the system?

A. nzbackup allB. nzhostbackupC. nzbackup-globalsD. nzbackup-system



QUESTION 24Which statement is TRUE regarding any database user?

A. The user has a tablespace definedB. The user can be assigned to more than one groupC. The user must have a corresponding host accountD. The user can be removed from the default PUBLIC group



QUESTION 25Why is it important to manage data skew?

A. Low table skew negatively impacts performanceB. High table skew negatively impacts performanceC. Low table skew negatively impacts data compressionD. Deleted rows consume disk space until they are freed



QUESTION 26When doing a CREATE SEQUENCE, which is always true about INCREMENT BY?

A. The value may only be positiveB. The value may only be negativeC. Cross-database access is supportedD. The value may be either negative or positive



QUESTION 27In order for an ODBC application running on Microsoft Windows to connect to Pure Data System forAnalytics, which two steps must be performed? (Choose two.)

A. Install nzsql for WindowsB. Install nzAdmin for WindowsC. Install an ODBC driver for WindowsD. Install an ODBC Driver Manager for WindowsE. Create or modify a Data Source Name (DSN) for a connection to a database

Correct Answer: CESection: (none)Explanation


QUESTION 28Here's an excerpt from a successful query execution plan file:

What does "DownloadTableNode distribute" indicate?

A. A broadcast is going to take place every time the query is executedB. A redistribution is going to take place every time the query is executedC. A broadcast is going to take place only the first time the query is executedD. A redistribution is going to take place only the first time the query is executed



QUESTION 29What is a view?

A. A virtual table stored in memory rather than on diskB. A pre-defined query executed in real time when the view is accessedC. A table of which only portions are visible to users based on user permissionsD. All of the above



QUESTION 30A user is logged onto the PROD database. The user has access to other databases on the same appliance.Which types of objects from other databases can the user reference in queries?

A. ViewsB. TablesC. SynonymsD. All of above



QUESTION 31Which log file should be reviewed to troubleshoot an intermittent SPU failure?

A. pg.logB. dbos.logC. sysmgr.logD. eventmgr.log



QUESTION 32How are security labels represented?


A. <categories> : <access> : <level>B. <cohorts> : <categories> : <level>C. <level> : <categories> : <cohorts>D. <access> : <cohorts> : <categories>



QUESTION 33Short Query Bias is enabled by default. Which of the following is NOT an advantage of using Short QueryBias?

A. It allows for all short queries to run in a guaranteed amount of time

B. The cost threshold is configurable with the hostschedSQBNominalSecs settingC. When the standard scheduler is full, short queries can take advantage of additional resources reserved

for themD. It allows queries with a cost estimate less than or equal to the defined short query length to run on a

busy system



QUESTION 34Which statement is TRUE about a simple load using external tables?

A. The load can be configured to automatically create a backup file of the table being loadedB. The load can be configured to automatically create a duplicate copy of the table being loadedC. The load can be configured to automatically remove duplicate rows from the table being loadedD. The load can be configured to automatically continue to load following an S-Blade reset or failure



QUESTION 35NPS syncs up which two folder structures between the active and passive hosts? (Select two)

A. /nz ElB. /logC. /hostD. /adminE. /export/home



QUESTION 36What new feature simplifies the gathering of information for a problem management record (PMR) with IBMSupport?

A. Call IBMB. Call 911C. Call HomeD. File Open PMR



QUESTION 37Which of the following statements is TRUE when a table is created?

A. 3MB of temporary space is allocated on each dataslice for the tableB. One page of storage space is allocated on each dataslice for the tableC. One extent of storage space is allocated on each dataslice for the tableD. No space is allocated by the system until a record is inserted into the table



QUESTION 38Which of the following can the NZDUMPSCHEMA command be used for?

A. Backup a databaseB. Dump the entire system catalogC. Output a shell script with SQL statementsD. Generate schema information, with its associated user data



QUESTION 39Dropping an external table does which of the following?

A. Deletes the data but not the table definitionB. Deletes the table definition but not the dataC. Deletes both the table definition and the dataD. Deletes neither the table definition nor the data



QUESTION 40What will occur when two large tables are joined together and the data is NOT co-located?

A. A hash join is not performedB. No data movement is requiredC. Data is dynamically redistributed or broadcastedD. One of the tables must be manually redistributed



QUESTION 41Which of the following is FALSE?

A. Outdated rows will cause queries to run slowerB. Outdated rows will cause disk space to be consumed by deleted dataC. Outdated rows consume space on a full backupD. Outdated rows will show up in the query's result set



QUESTION 42What are the two primary components of an S-Blade?

A. CPUs and hostsB. FPGAs and hostsC. CPUs and FPGAsD. CPUs and the fabric



QUESTION 43In order to set a runaway query event to trigger when a query runs longer than two minutes, which twoitems should be configured? (Choose two)

A. The runaway query event must be enabledB. The pg.log file must be configured for two minutesC. The runaway query event must be configured for two minutesD. The nzsystem command must be used to set the QUERYTIMEOUT to two minutesE. The CREATE or ALTER USER command must be used to set the QUERYTIMEOUT to two minutes

Correct Answer: ACSection: (none)Explanation


QUESTION 44Which event type can be used to monitor queries that exceed configured query timeout limits?

A. RunAwayQueryB. SystemStucklnStateC. InfiniteOueryDetectedD. Transaction LimitEvent

Correct Answer: CSection: (none)

Explanation


QUESTION 45Which statement about the Netezza System Health Check tool is TRUE?

A. The tool stores captured data in the system catalogB. The tool is integrated with the failover and upgrade processesC. The tool must be manually started with the "nzhealthcheck-start" commandD. The tool can automatically fix the basic issues identified via Level 1 rule evaluation



QUESTION 46The query history data collected DOES NOT provide insight to which of the type of performance andbehavior questions?

A. The typical or most common types of queries.B. The longest and shortest running queries on the system.C. The queries submitted by specific users or groups of users.D. The rotational speed of the disk drives during query execution.



QUESTION 47Which of the following will NOT change the priority of all jobs in a session?

A. nzsystem -session -id 21664 -priority highB. ALTER SESSION 21664 SET PRIORITY TO HIGH;C. nzsession priority -high -u user -pw password -id 21664D. NzAdmin tool > click on Session > right click on session > change priority > click on priority level



QUESTION 48When a CREATE TABLE AS (CTAS) is performed on a table inserting more than 1,000,000,000 rows,which statement is TRUE?

A. Groom will be automatically invokedB. Primary key constraints will be checkedC. Statistics will automatically be generatedD. Materialized views will be automatically generated



QUESTION 49After a successful upgrade, what must be done to place new session limits into effect?

A. No further action is requiredB. Log out of NZ and log back inC. Execute the NZSESSION NEW commandD. Execute the NZSESSION REFRESH command



QUESTION 50Data Restrict Optimization does NOT accomplish which of the following?

A. Reduces latency of the queryB. Reduces the time taken to process a single snippetC. Allows multiple different snippets to run concurrentlyD. Reduces the number of drives searched by a snippet


Explanation/Reference:Reference:http://www.redbooks.ibm.com/redpapers/pdfs/redp4725.pdf

QUESTION 51When creating a table with nullable columns, which statement is TRUE?

A. 0 is equal to null, the empty string (`') is equal to nullB. 0 is equal to null, the empty string (`') is not equal to nullC. 0 is not equal to null, the empty string (`') is equal to nullD. 0 is not equal to null, the empty string (`') is not equal to null



QUESTION 52Within a single Pure Data System for Analytics, what is the fastest way to copy a very large table fromdatabase PROD to database TEST?

A. Use a CTAS statementB. Use the COPY command

C. Use external tables and UNIX pipesD. Use nzbackup and nzrestore commands



QUESTION 53Why is generating statistics on a table important to query performance?

A. The table statistics are used to facilitate dislespace reclamation of deleted rowsB. The optimizer uses statistics to determine the optimal execution plan for queriesC. The zone map information cross references the table statistics for each column to avoid scanningD. The Field Programmable Gate Array (FPGA) utilizes the statistics to identify which rows/columns to filter



QUESTION 54What must be properly defined for a table in order to avoid data skew:

A. Skew ratioB. DistributionC. OrganizationD. Statistics generation



QUESTION 55When reviewing the output of an EXPLAIN PLANGRAPH in IBM Netezza Performance Portal, how is theoutput read?

A. Left to right, from top to bottomB. Left to right, from bottom to topC. Right to left, from top to bottomD. Right to left, from bottom to top



QUESTION 56What utility is used to find out which host is currently active?

A. nzstate

B. nzconfigC. crm_resourceD. service heartbeat start


Explanation/Reference:Reference:http://delivery04.dhe.ibm.com/sar/CMA/IMA/053uf/0/README.txt

QUESTION 57What information is the NZDUMPSCHEMA command capable of outputting?

A. Table definitions onlyB. Table definitions, and view definitions onlyC. Table definitions, view definitions, and database statistical information onlyD. Table definitions, view definitions, database statistical information, and user-defined extensions

registered within the database



QUESTION 58When enabled, query history always collects information about login failures, session creation, sessiontermination, and query history process startup. Which area does query history NOT collect data?


A. PlansB. DisksC. TablesD. Queries



QUESTION 59When working with sequences, which statement will always be TRUE?

A. Only integers are generatedB. The default data type is SMALL I NTC. The first value generated is the number 1D. Values generated by the sequence will be unique across all tables and databases



QUESTION 60What is the only predefined database user, which is able to access all objects and perform all tasks againstthe database?

A. RootB. PublicC. AdminD. System



QUESTION 61Which of the following system views will NOT show information about active queries?

A. _v_qryhistB. _v_qrystatC. _v_planstatusD. _v_querystatus



QUESTION 62What statement about LDAP security is TRUE?

A. If a user can be authenticated locally, LDAP authentication will not be usedB. When LDAP authentication is used, NPS will require a password if the ALTER USER statement is runC. If LDAP authentication fails, NPS will note the reason for the failure in the /nz/kit/log/postgres/pg.log fileD. When LDAP authentication is used, NPS will require a password if the CREATE USER statement is run


Explanation/Reference:Reference:http://delivery04.dhe.ibm.com/sar/CMA/IMA/054ac/0/README.7.2.0.3-P2

QUESTION 63External tables that only exist for the duration of a single query are known as

A. Hosted TablesB. Session Tables

C. Transient External TablesD. Temp or Temporary External Tables


Explanation/Reference:Reference:https://www-304.ibm.com/support/knowledgecenter/SSULQD_7.1.0/com.ibm.nz.load.doc/c_load_transient_external_tables.html

QUESTION 64A user performs a full backup of a database on Monday and a differential backup on Tuesday. OnWednesday what is the fastest method to ensure a complete backup of user data?

A. Perform a full backupB. Perform a differential backupC. Perform a cumulative backupD. Perform cumulative and differential backups



QUESTION 65In Release 7.1 what happened to Gatekeeper registry settings?

A. They were replaced by Scheduler RulesB. They were replaced by Gatekeeper RulesC. The number of registry settings was significantly reducedD. The number of registry settings was significantly increased



QUESTION 66Which of the following statements about rowids is TRUE?

A. They will always be unique within a tableB. They will always be sequential within a tableC. Unlike createxid and deletexid, rowids are only 8 bytesD. A&B



QUESTION 67

A thermal fault has occurred. Where would more information be found regarding the problem?

A. nz/kit/log/dbos/dbosJogB. nz/kit/log/postgres/pgJogC. /nz/kit/log/sysmgr/sysmgr.logD. /nz/kit/log/sysmgr/hardwareJog



QUESTION 68When a temporary table is created, where will the data be stored?

A. In physical memory on the S-BladesB. On the host under the /nz/tmp directoryC. On the S-Blades under the data partitionD. On the S-Blades under the swap partition



QUESTION 69Where are the NPS log files located on the host?

A. /var/logB. /usr/localC. /nz/kit/logD. The SYSTEM database


Explanation/Reference:Reference:http://www-01.ibm.com/support/docview.wss?uid=swg21671539

QUESTION 70The CUSTOMER table has one column, customerid. Which statement can be used to determine the dataskew of the table?

A. SELECT DISTINCT (datasliceid) FROM customer;B. SELECT DISTINCT (customerid) FROM customer;C. SELECT datasliceid, COUNT(*) FROM customer GROUP BY 1 ORDER BY 2;D. SELECT customerid, COUNT(*) FROM customer GROUP BY 1 ORDER BY 2;



QUESTION 71Which additional feature in NPS would you need to configure to use an audit database?

A. Call homeB. Multi-level securityC. Enhanced cryptography SP 800-131D. Workload Management Scheduler Rules


Explanation/Reference:Reference:http://www-01.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/5/897/ENUS214-055/index.html&lang=en&request_locale=en

QUESTION 72Which of the following are valid types of scheduler rules? (Choose two.)

A. Resource scheduler ruleB. Limiting scheduler ruleC. Runtime scheduler ruleD. Modifying scheduler ruleE. Prioritizing scheduler rule

Correct Answer: AESection: (none)Explanation


QUESTION 73Which of the following statements will create a row secure table?

A. Create rowsecure table myRST (aint, b int);B. Create table myRST (aint, b int) row security;C. Create table myRST (aint, b int) as row secure table;D. Create table myRST (a int, b int, _sec_labelvarchar(4000));



QUESTION 74nzload is invoked with the "allowReplay" option enabled- If the state changes from online to pausing then toonline, which statement is TRUE?

A. nzload will failB. nzload automatically continues without user interventionC. nzload must be stopped and resumed by the user from the last check pointD. nzload automatically restarts but the user must remove the allowReplay option



QUESTION 75Which statement will cause IBM Netezza Replication Services to use "By-Value" instead of the "By-SQL"replication method?

A. INSERT INTO customer VALUES (NULLIF(a, b),,);B. INSERT INTO customer VALUES (RANDOMO,,);C. INSERT INTO customer SELECT rowid FROM orders;D. B & CE. A & B

Correct Answer: ESection: (none)Explanation


QUESTION 76A user has access to two databases, DEV and PROD. Currently the user is connected to the DEVdatabase.

Which operation is permitted?

A. DELETE FROM prod.dbuser.customerB. SELECT * FROM prod.dbuser.customerC. TRUNCATE TABLE prod.dbuser.customerD. INSERT INTO prod.dbuser.customer SELECT * FROM dev.dbuser.customer



QUESTION 77With LDAP enabled, which of the following can be verified against an LDAP server?

A. ADMIN user authenticationB. Non-ADMIN user authenticationC. Database user SELECT privilegesD. Database user GROUP authentication



QUESTION 78Which of the following cannot be found with an EXPLAIN statement?

A. Viewing scan orderB. Viewing active queriesC. Viewing confidence levelD. Viewing estimated costs



QUESTION 79What is the naming convention for system views?

A. _v_B. _$v_ rC. nz_v_D. sys_v_



QUESTION 80If nzload is being used to load data into the customer table, which of the following operations will be blockeduntil the load has completed?

A. SELECT from the customer tableB. DELETE from the customer tableC. TRUNCATE of the customer tableD. nzbackup of the database in which the customer table resides



QUESTION 81What does "Plan 4.457" signify in the attached snapshot of a plan file?

A. The query plan was built in 4457 secondsB. The query plan was saved in 4457 secondsC. The query plan was queued for 4457 secondsD. The query plan was executed in 4457 seconds



QUESTION 82What two conditions must be met to achieve a co-located join between two tables without a dynamicredistribution? (Choose two.)

A. Both tables have primary keys definedB. Both join columns have the same nameC. Both tables must be distributed on randomD. Both join columns have identical data typesE. Both tables must be distributed on their join column



QUESTION 83A stored procedure returning one value is created. Which two methods can be used to execute theprocedure? (Choose two.)

A. EXECUTE commandB. SELECT statement within a FROM clauseC. SELECT statement within a HAVING clauseD. SELECT statement without a FROM clause

E. SELECT statement with tables in the FROM clause



QUESTION 84In a UNIX 64-bit environment, a 64-bit application requires which software to execute SQL statements viaODBC? (Choose two.)

A. nzsqlB. An ODBC driver managerC. The system does not support 64-bit ODBCD. A 64-bit ODBC driver for the same UNIX environmentE. A 32-bit ODBC driver for the same UNIX environment



QUESTION 85Which will guarantee that a zonemap is generated for the NAME column?

A. CREATE TABLE customer (name VARCHAR(20));B. CREATE TABLE customer (name VARCHAR(20)); ALTER TABLE customer ZONEMAP ON (name);C. CREATE TABLE customer (name VARCHAR(20)) DISTRIBUTE ON (name);D. CREATE TABLE customer (name VARCHAR(20));

CREATE MATERIALIZED VIEW custview AS SELECT * FROM customer ORDER BY name;



QUESTION 86Given the following query: SELECT * FROM customers;

How does data flow through the Pure Data System for Analytics components?

A. FPGA to Disk to Host to UserB. Disk to FPGA to CPU to Host to UserC. Disk to CPU to FPGA to Host to UserD. Disk to Host to S-Blade to FPGA to User



QUESTION 87

Which of the following statements is TRUE?

A. Each table is assigned its own set of data slicesB. Each database is assigned its own set of data slicesC. When creating a database the maximum allowed space can be specifiedD. When the system creates records, it assigns them to a logical data slice based on their distribution key

value.



QUESTION 88Which statement about nzrestore is NOT true?

A. nzrestore can restore selected tablesB. nzrestore can perform a redirected restoreC. nzrestore can restore from an nzbackup UNIX pipeD. nzrestore can restore to a different Pure Data System for Analytics server from the backup server



QUESTION 89Which statement about the GROOM feature is TRUE?

A. GROOM requires space to make a complete copy of the tableB. GROOM prevents nzload from inserting data while in progressC. GROOM only operates on tables that include an ORGANIZE ON clauseD. GROOM allows UPDATE, DELETE, and INSERT operations to occur while a backup is in progress



QUESTION 90Which High-Availability (HA) mechanism is used by the PureData System for Analytics Appliance?

A. AIX-HAB. Linux-HAC. SuSE-HAD. Solaris-HA



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