______ index stores first value in each block in the sequential file and a pointer to the block. Select correct option: Dense Sparse B-Tree Hash In context of data parallelism, the work done by query processor should be: Select correct option: Almost zero Maximum Pipelined Filtered across partitions The optimizer uses a hash join to join two tables if they are joined using an equijoin and Select correct option: Outer table has less number of rows Inner table has less number of rows Cardinality of tables is equal Large amount of data needs to be joined Bitmap index is appropriate for: Select correct option: Low cardinality data High cardinality data Clustered data Aggregated data If a task takes “T” time units to execute on a single data item, then execution of this task on “N” data items will take __...
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