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  1. Select the sequence for how the query mechanism works?
    1. DML->query optimizer-> Authentication-> DDL-> output
    2. Authentication-> DDL->DML->query optimizer->output
    3. DDL->DML->query optimizer-> Authentication->output
    4. All of above
    5. None of these
Correct Option: B

When we execute any query, the first step is authentication (password). Second step for data definition mechanism, Third step is for Data Manipulation and the last is optimizer for efficient execution.


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