Multiple choice technology databases

A segment has 3 occurrences for a parent. This segment is called a

  1. multiple

  2. twin

  3. sibling

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In IMS hierarchical databases, when a segment type has multiple occurrences (instances) under the same parent segment, those occurrences are called 'twins'. Each twin represents a different record of the same segment type sharing a common parent. 'Sibling' refers to different segment types under the same parent, not multiple occurrences of the same type.

AI explanation

In a hierarchical (IMS/DL-I) database, when a single parent segment has multiple occurrences of the same child segment type, those repeated child occurrences are called 'twins' — they share the same segment type and parent but represent different instances of data. Terms like 'multiple' or 'sibling' aren't the standard hierarchical database terminology for this relationship.

Keep practicing — related questions