Match the following operators with their definition in data definition language.
2021
Match the following operators with their definition in data definition language.
- A.
1-iii, 2-i, 3-ii
- B.
1-i, 2-ii, 3-iii
- C.
1-ii, 2-iii, 3-i
- D.
1-iii, 2-ii, 3-i
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Correct answer: A
In Data Definition Language (DDL) notation, different symbols are used to represent the structure and occurrence of data elements.
{ } represents iterative/repetitive data, meaning the element can occur multiple times.
( ) represents optional data, meaning the element may or may not be present.
[ , ] represents selection, meaning one choice is selected from the given alternatives.
Therefore, the correct matching is:
1 → iii
2 → i
3 → ii
Hence, the correct answer is: 1-iii, 2-i, 3-ii