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最新的 IBM Specialist A2090-421 免費考試真題:
1. A script invokes an update job called "UpdateKeys" via a command line invocation of the dsjob command. The service is to wait for the completion and status of this job before continuing with the rest its tasks. Which three commands would invoke the "UpdateKeys" job in the MigrationProject and wait for its completion status? (Select three)
A) dsjob-run-wait MigrationProject UpdateKeys
B) dsjob -run MigrationProject UpdateKeys
C) dsjob -run -log dsjob -run -userstatus MigrationProject UpdateKeys
D) dsjob-run-userstatus MigrationProject UpdateKeys
E) dsjob -run -jobstatus MigrationProject UpdateKeys
2. Which three actions can improve sort performance in a DataStage job? (Choose three.)
A) Adjust the "Restrict Memory Usage" option in the Sort stage.
B) Use the stable-sort option to avoid the random ordering of non-key data.
C) Specify only the key columns which are necessary.
D) Run the job sequentially so that only one sort process is invoked.
E) Minimize the number of sorts used within a job flow.
3. You are asked to identify the jobs and shared containers that use the ADDRESS column. The Size has changed from 50 to 120 characters in the source system so the jobs must be updated with the new size. What feature of the Designer will locate where a column is used in a DataStage project?
A) Open the Table Definition properties, Select the ADDRESS column, then right click and select Find where used.
B) Select a Table Definition, then right click and choose Find where column is used. Select the column to search for from the list.
C) From Designer Tools open an Advanced Find dialog. Select Columns from the Type list and enter the column name in the Name To Find field.
D) From Designer Tools, open an Advanced Find dialog. Enter the column name in the Name to find field. Select Jobs and Shared Containers from the Type to find list.
4. A star schema data warehouse consists of four dimension tables and one fact table. How many Slowly Changing Dimensions (SCD) stages will you need in your jobs to update the star schema tables?
A) three
B) five
C) four
D) two
5. A job contains a Sort stage that sorts a large volume of data across a cluster of servers. Due to new requirements, the customer has requested that this sorting be done on a subset of servers identified in the configuration file to minimize impact on database nodes. The $APT_CONFIG_FILE shows no sort disk pool for any node. Which two steps will accomplish this? (Choose two.)
A) Define a non-default node pool with a subset of nodes in the parallel configuration file.
B) Assign a separate config file just for the Sort stage.
C) Create a sort scratch disk pool with a subset of nodes in the parallel configuration file.
D) Use the environment variable $APT_SCRATCH_SPACE_SORT_USAGE.
E) Have an appropriate node constraint within the Sort stage.
問題與答案:
問題 #1 答案: A,C,D | 問題 #2 答案: A,C,E | 問題 #3 答案: C | 問題 #4 答案: C | 問題 #5 答案: A,E |
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