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Database Systems Practice Test 9

Nested Subqueries Quiz Questions and Answers PDF - 9

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Nested Subqueries Questions and Answers PDF Download: Quiz 9

MCQ 41:

The exist construct returns true as a value, if the argument subquery is

  1. Empty
  2. Not empty
  3. Exist
  4. Not exist
MCQ 42:

The preface that converts the DML statements to normal procedure calls in the host language, is known as

  1. DML pre-executor
  2. DML executor
  3. DML compiler
  4. DML precompile
MCQ 43:

If any of the input values is null, the result of an arithmetic expression, would be

  1. 0
  2. Null
  3. 1
  4. Undefined
MCQ 44:

Mapping cardinalities are useful in describing

  1. Unary relationships
  2. Binary relationships
  3. Composite relationships
  4. Simple relationships
MCQ 45:

The problem of being unable to represent some information, can be solved by introducing

  1. Pointers
  2. Null values
  3. 0 value
  4. Null pointer

Database Systems Exam Prep Tests

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