Snowflake SnowPro-Advanced-Data-Engineer

For a business group, you need to create a table with customer demography data in snowflake. Business users will need to do both range and equality searches on the table. Which of the below techniques will you use to speed up the queries.

Lets say you created a schema and a table as below
    CREATE OR REPLACE SCHEMA TIME_TRAVEL_SCHEMA DATA_RETENTION_TIME_IN_DAYS =10;
    CREATE OR REPLACE TABLE TIME_TRAVEL_SCHEMA.TIME_TRAVEL_TABLE (ID NUMBER) DATA_RETENTION_TIME_IN_DAYS =20;
Later you dropped the schema. In this scenario what data retention value will be honored for the table, if we need to retrieve the table data

Streams cannot be created to query change data on which of the following objects? [Select All that Apply]

The smaller the average depth, the better clustered the table is with regards to the specified column? 

When using the CURRENT_ROLE and CURRENT_USER functions with secure UDFs that will be shared with Snowflake accounts, Snowflake returns a NULL value for these functions?