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Endian? Is that a word?

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Endian? Is that a word? is a cooked quant interview question on computer architecture.

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Understanding endianness in computer architecture

This is a foundational computer architecture question that tests whether you understand how multi-byte values are stored in memory. Endianness comes up frequently in systems programming, low-level optimization, and especially in roles that involve network protocols, binary file formats, or cross-platform code.

The question probes your grasp of the gap between how we think about numbers (as abstract values) and how processors actually arrange their bytes in RAM. Getting this right matters for debugging subtle bugs in serialization, interpreting memory dumps, and reasoning about performance implications of data layout.

  • Byte ordering conventions and their trade-offs
  • How processors read and write multi-byte integers
  • Cross-platform and network byte-order concerns