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- Question
Before specifying a key for a class, you must specify its extent.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The ODMG Object Model supports only unary and binary relationships.
Options- A. True
- B. False Discuss
- 2. If you know all the possible values that an attribute can have, you can enumerate those values in ODL.
Options- A. True
- B. False Discuss
- 3. Each site (or node) in a distributed system is subject to the same types of failure as in a centralized system.
Options- A. True
- B. False Discuss
- 4. The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
Options- A. True
- B. False Discuss
- 5. Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.
Options- A. True
- B. False Discuss
- 6. In ODL, you specify an operation using parentheses after its name.
Options- A. True
- B. False Discuss
- 7. ODL supports the abstract keyword for classes and operations.
Options- A. True
- B. False Discuss
- 8. The Object Model supports different literal types, but does not support atomic literals, collection literals, and structured literals.
Options- A. True
- B. False Discuss
- 9. An attribute's value is always literal.
Options- A. True
- B. False Discuss
- 10. A collection of literals or object types is called a bag.
Options- A. True
- B. False Discuss
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