ITPEC IP October 2025 Question 2
ITPEC IP October 2025 — Question 2 of 100
11000101 — add the two positive 8-bit values with binary carries.
01011010 is decimal 90 and 01101011 is decimal 107. Their sum is 90 + 107 = 197. Decomposing 197 gives 128 + 64 + 4 + 1, so the 8-bit binary representation is 11000101.
Answer (d)
Why not others:
- (a) 00110001 is decimal 49
- (b) 01111011 is decimal 123
- (c) 10000100 is decimal 132
None matches the decimal sum 197.
Key rule: For an unsigned 8-bit result, verify the value lies from 0 to 255 and preserve carries across all eight bit positions.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official IP past-paper collection or Report an issue.