A Level Computer Science OCR Practice Exam

Which of the following best represents the concept of aggregate data structure?

1. Only single elements stored

2. Combination of separate elements, usually indexed

3. Consistent dimensional data without any variation

4. Randomly collected data elements

The correct answer is: Combination of separate elements, usually indexed

The correct answer reflects the definition of an aggregate data structure, which is designed to hold multiple separate elements combined into a single unit. These elements can typically be of the same or different types and are often indexed to allow for efficient access and manipulation. For example, in programming, an array can be considered an aggregate data structure because it combines elements of the same data type and allows for indexed access to each element. Similarly, a record or a structure in languages like C or C++ can hold different types of data together in one composite unit. The other options do not accurately depict the nature of aggregate data structures: - Single elements imply simplicity and do not represent the combination aspect of aggregate types. - Consistent dimensional data without variation refers to a specific format, not emphasizing the combination of various elements, which is key in aggregate structures. - Randomly collected data elements suggests an unordered or unstructured form of data, which does not align with the organized and indexed nature of aggregate data structures. By understanding that aggregate data structures are characterized by the combination and organization of multiple elements, you can appreciate their role in managing complex data in programming and computer science.