1Z0-054 Question #18: Real Exam Question with Answer & Explanation

Examine the initialization parameter values for the instance given below: NAME TYPE VALUE ------------------------------------ ----------- ------------------ optimizer_capture_sql_plan_baselines boolean FALSE optimizer_dynamic_sampling integer 2 optimizer_features_enable string 11.1.0.6 optimizer_index_caching integer 0 optimizer_index_cost_adj integer 100 optimizer_mode string ALL_ROWS db_file_multiblock_read_count integer 64 The index created on the column used in the WHERE clause of the query. You notice that the query is not using the index. Instead of an index scan, a full table scan is used. View the Exhibit and examine the autotrace output for a query. What could be the reason for it? (Choose all that apply.)