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1Z0-117 - Oracle Real Exam Questions

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1Z0-117 - Oracle Real Exam Questions

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  1. 1Z0-117 - Oracle Certification https://www.pass4sures.com/1z0-117.html

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  9. 1Z0-117 - Oracle Real Exam Question No : 1 You are administering a database that supports an OLTP workload. Automatic optimizer statistics collection is scheduled in the night maintenance window. Some of the tables get updated frequently during day time and you notice a performance degradation for queries using those tables due to stale statistics. Which two options might help to avoid the performance degradation of the queries? Which two options might help to avoid the performance degradation of the queries? A. Set the global statistics preference STALE_PERCENT to 0. B. Use dynamically sampling hint for the queries on frequently updated tables. C. Create histogram for the columns used frequently in the WHERE clause. D. Gather statistics with global statistics preference NO_VALIDATE to TRUE. E. Set the OPTIMZER_USE_PENDING_STATISTICS parameter to TRUE. Answer: B,C https://www.pass4sures.com/1z0-117.html

  10. 1Z0-117 - Oracle Real Exam Question No : 2 You are administering database that supports an OLTP workloads. Most of the queries use an index range scan or index unique scan as access methods. Which three scenarios can prevent the index access being used by the queries? A. When highly selective filters is applied on an indexed column of a table with sparsely A. When highly selective filters is applied on an indexed column of a table with sparsely populated blocks. B. When the rows are filtered with an IS NULL operator on the column with a unique key defined C. When the histogram statistics are not collected for the columns used in where clause. D. When a highly selective filter is applied on the indexed column and the index has very low value for clustering factor. E. When the statistics for the table are not current. Answer: A,B,E https://www.pass4sures.com/1z0-117.html

  11. 1Z0-117 - Oracle Real Exam Question No : 3 While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for a statement that has stale statistics. Automatic optimizer statistics is enabled for the database. What does the optimizer do in this situation? What does the optimizer do in this situation? A. Updates the existing SQL profiles for which the statistics are stale. B. Makes the statistics information available to GATHER_DATABASE_STATS_JOB_PROC C. Starts the statistics collection process by running GATHER_STATS_JOB D. Writes a warning message in the alert log file Answer: B https://www.pass4sures.com/1z0-117.html

  12. 1Z0-117 - Oracle Real Exam Question No : 4 Which two statements are true about index full scans? A. An index fast full scan multi block I/O to read the index structure in its entirely. B. Index nodes are not retrieved in the index order, and there fore the nodes are not in sequence. C. An index fast full scan reads the index block by block. D. An index fast full scan reads the whole index from the lowest value to the higher value. Answer: A,B https://www.pass4sures.com/1z0-117.html

  13. 1Z0-117 - Oracle Real Exam Question No : 5 Examine the Exhibit. https://www.pass4sures.com/1z0-117.html

  14. 1Z0-117 - Oracle Real Exam Question No : 5 Examine the Exhibit. Which two statements are true about the bloom filter in the execution plan? A. The bloom filter prevents all rows from table T1 that do not join T2 from being needlessly distributed. B. The bloom filter prevents all rows from table T2 that do not join table T1 from being B. The bloom filter prevents all rows from table T2 that do not join table T1 from being needlessly distributed. C. The bloom filter prevents some rows from table T2 that do not join table T1 from being needlessly distributed. D. The bloom filter is created in parallel by the set of parallel execution processes that scanned table T2. E. The bloom filter is created in parallel by the set of parallel execution processes that later perform join. F. The bloom filter is created in parallel by the set of parallel execution processes that scanned table T1. Answer:C,E

  15. 1Z0-117 - Oracle Real Exam Question No : 6 You are logged in as the HR user and you execute the following procedure: SQL > exec DBMS_STATS.SET_TABLE_PREFS (‘HR’, ‘EMPLOYEES’, ‘PUBLISH’, ‘FALSE’); SQL> exec DBMS_STATS.GATHER_TABLE_STATS (‘HR’, ‘EMPLOYEES’); Which statement is true about the newly gathered statistics? Which statement is true about the newly gathered statistics? A. They are temporary and purged when the session exits. B. They are used by the optimizer for all sessions. C. They are locked and cannot be overwritten. D. They are marked as pending and stored in the pending statistics table. Answer :D

  16. 1Z0-117 - Oracle Real Exam Question No : 7 Which two are the fastest methods for fetching a single row from a table based on an equality predicate? A. Fast full index scan on an index created for a column with unique key B. Index unique scan on an created for a column with unique key C. Row fetch from a single table hash cluster D. Index range scan on an index created from a column with primary key E. Row fetch from a table using rowid Answer :C,E

  17. 1Z0-117 - Oracle Real Exam Question No : 8 You enable auto degree of parallelism (DOP) for your database instance. Examine the following query: Which two are true about the execution of statement? A. Dictionary DOP for the objects accessed by the query is used to determine the statement DOP. B. Auto DOP is used to determine the statement DOP only if the estimated serial execution time exceeds PARALLEL_MIN_TIME_THRESHOLD. C. Dictionary DOP is used to determine the statement DOP only if the estimated serial execution time exceeds ARALLEL_MIN_TIME_THRESHOLD. D. The statement will be queued if insufficient parallel execution slaves are available to satisfy the statements DOP. E. The statement will be queued if the number of busy parallel execution servers exceeds PARALLEL_SERVERS_TARGET. F. The statements may execute serially. Answer :E,F

  18. 1Z0-117 - Oracle Real Exam Question No : 9 View the code sequence: https://www.pass4sures.com/1z0-117.html

  19. 1Z0-117 - Oracle Real Exam Question No : 9 Examine the Exhibit to view the execution plan https://www.pass4sures.com/1z0-117.html

  20. 1Z0-117 - Oracle Real Exam Question No : 9 Which two statements are true about the query execution? A. The optimizer joins specified tables in the order as they appear in the FROM clause. B. The CUSTOMERS and ORDERS tables are joined first and the resultant is then joined with rows returned by the ORDER_ITEMS table. C. The CUSTOMERS and ORDER_ITEMS tables are joined first the resultant is then joined with rows by the ORDERS table. D. The optimizer has chosen hash join as an access method as the OPTIMIZER_MODE parameter is set to FIRST_ROWS. Answer: C,D https://www.pass4sures.com/1z0-117.html

  21. 1Z0-117 - Oracle Real Exam Question No : 10 Examine the query and its execution plan: https://www.pass4sures.com/1z0-117.html

  22. 1Z0-117 - Oracle Real Exam Question No : 10 Which statement is true regarding the execution plan? A. This query first fetches rows from the CUSTOMERS table that satisfy the conditions, and then the join return NULL from the CUSTOMER_ID column when it does not find any then the join return NULL from the CUSTOMER_ID column when it does not find any corresponding rows in the ORDERS table. B. The query fetches rows from CUSTOMERS and ORDERS table simultaneously, and filters the rows that satisfy the conditions from the resultset. C. The query first fetches rows from the ORDERS table that satisfy the conditions, and then the join returns NULL form CUSTOMER_ID column when it does not find any corresponding rows in the CUSTOMERS table. D. The query first joins rows from the CUSTOMERS and ORDERS tables and returns NULL for the ORDERS table columns when it does not find any corresponding rows in the ORDERS table, and then fetches the rows that satisfy the conditions from the result set. Answer: A https://www.pass4sures.com/1z0-117.html

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