1. ODL supports the abstract keyword for classes and operations.

A. True
B. False

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2. The ODMG Object Model requires that a relationship be specified in both directions.

A. True
B. False

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3. Before specifying a key for a class, you must specify its extent.

A. True
B. False

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4. The Object Model supports different literal types but does not support atomic literals, collection literals, and structured literals.

A. True
B. False

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5. The ODMG Object Model supports only unary and binary relationships.

A. True
B. False

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