Solution

The correct answer is A - IV, B - III, C - II, D - I

EXPLANATION:

• A. SZA:
  • This is probably an instruction for "Skip if Zero Accumulator". In assembly language, the accumulator (AC) is a register where intermediate arithmetic and logic results are stored. If the AC is zero, this instruction would cause the program to skip the next instruction.
• B. SKI:
  • This could stand for "Skip if Input flag is on". In computer programming, a flag is a value that acts as a signal for a function or process. Therefore, this instruction would skip the next instruction if a specific input flag was raised or "on".
• C. SNA:
  • "Skip if Accumulator is Negative" seems an apt fit. Similar to SZA, this instruction would skip the next operation if the value in the accumulator is negative.
• D. ISZ:
  • This likely means "Increment and Skip if Zero". This means the designated memory location (M) would be incremented by one, and then if the result is zero, the next instruction would be skipped.

Thus, based on these explanations, the correct match is:

A. SZA - IV. Skip if AC is zero B. SKI - III. Skip if input flag is on C. SNA - II. Skip if AC is negative D. ISZ - I. Increment M and skip it zero

So, the correct choice is 4) A - IV, B - III, C - II, D - I.