Assembly source notation In assembly language programming, is a label primarily used to name the address (location) associated with a single line/instruction so it can be referenced elsewhere?

Difficulty: Easy

Correct Answer: True

Explanation:


Introduction / Context:
Labels provide symbolic names for addresses in assembly programs, improving readability and enabling relocatable code. They are commonly attached to instruction lines or data declarations.


Given Data / Assumptions:

  • A label marks a program location (address).
  • Assemblers replace label references with numeric addresses.
  • Labels can precede instructions or data definitions.


Concept / Approach:
A label identifies the address of the line it annotates. Control flow instructions (for example, jumps, calls) or data references can then target that label rather than hardcoding numeric addresses.


Step-by-Step Solution:

1) Author writes LABEL: at the start of a line.2) The assembler assigns the current location counter to LABEL.3) Elsewhere, instructions like JNZ LABEL use the resolved address of LABEL.4) If lines move, the label stays correct, aiding maintenance.


Verification / Alternative check:
Examine an assembled listing: labels expand to absolute addresses in machine code.


Why Other Options Are Wrong:
False would ignore the fundamental purpose of labels in assembly.


Common Pitfalls:
Reusing the same label name, or assuming labels imply scope like high-level languages (they typically do not).


Final Answer:
True

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