Question

Explain ‘Sequential Codes’ and ‘Block Codes’ with examples.

Hint:

Choose sequential codes for unique identification and block codes for grouping related items for efficient classification.

Answer 1

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.