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Exam C2090-616 topic 1 question 60 discussion

Actual exam question from IBM's C2090-616
Question #: 60
Topic #: 1
[All C2090-616 Questions]

Shadow tables are a special kind of Materialized Query Table, but what makes them different? (Choose two.)

  • A. Shadow tables cannot be queried directly
  • B. Shadow tables do not store their data on disk
  • C. Shadow tables must be organized by column
  • D. Shadow tables must be maintained by replication
  • E. You cannot join shadow tables to other kinds of tables CD
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Suggested Answer: Explanation 🗳️
by db2tester at Oct. 8, 2019, 12:36 p.m.

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db2tester
5 years, 1 month ago
The good answer is C,D. A shadow table is a column-organized copy of a row-organized table that includes all columns or a subset of columns. Shadow tables are implemented as materialized query tables (MQTs) that are maintained by replication. Reference : https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.admin.dbobj.doc/doc/c0061564.html
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