Quant Interview Practice Questions

The Financial Information eXchange (FIX) protocol is a standard electronic communications protocol used in quantitative finance for the real-time exchange of securities transactions. A FIX message consists of a collection of tag-value pairs separated by a delimiter, requiring precise formatting and checksum validation to ensure data integrity during high-frequency trading. Task Implement the build method within the FIXMessageBuilder class that constructs a valid FIX 4.2 message string given a s