Which of the following is not an intermediate code form?

Answer: 'Quadrupules' is not an intermediate code form as written.

Explanation: The option text 'Quadrupules' is a misspelling and not a recognized term. The intended, correctly spelled term is 'quadruples', which actually is a valid intermediate representation (each quadruple typically contains operator, argument1, argument2, result). Because the choice is spelled incorrectly/unrecognized, it is the correct selection for "not an intermediate code form" in this exact wording.

• Syntax trees: These (abstract syntax trees) represent program structure and are commonly used as an intermediate representation for semantic analysis and code generation.

• Three-address codes: A standard intermediate code form where each instruction has at most one operator and up to three addresses (operands/results); useful for optimization and lowering to machine code.

• Quadrupules (as written): Not a recognized term. If intended 'quadruples', those are a valid intermediate code form. The misspelling makes the option incorrect in its current form.

• Postfix Notation: Also used as an intermediate representation (reverse Polish notation) for expression evaluation, particularly in stack-based code generation.

Conclusion: Because the listed term is misspelled and not a recognized intermediate code form as written, it is identified as the correct choice for "not an intermediate code form."