Explain ‘Sequential Codes’ and ‘Block Codes’ with examples.
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Solution and Explanation
Sequential Codes: Sequential codes are numbers or identifiers assigned in a consecutive manner, ensuring each code is unique. Example: Invoice numbers like 001, 002, 003, or employee IDs like E001, E002, E003.
Advantages: Easy to understand and use. Useful for maintaining chronological records, such as sales invoices or admission forms.
Disadvantages: Does not provide any categorization or specific meaning to the code. If a code is missed, it may create confusion or gaps in records. Block Codes: Block codes reserve ranges of numbers or identifiers for specific categories or groups. Example: In a library, science books may be coded as 100–199, literature books as 200–299, etc.
Advantages: Simplifies categorization and retrieval of information. Allows flexibility in expanding the range for a category without affecting others. Disadvantages: More complex to implement compared to sequential codes. May lead to wastage of numbers if ranges are not fully utilized.
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