Algorithm Design And Problem-solving: Complete A Trace Table To Document A Dry-run Of An Algorithm (Copy)
| Concept | Explanation |
|---|---|
| Trace Table | A table used to track variable values step-by-step |
| Dry-run | Manually following an algorithm without running it |
| Purpose | Helps understand logic and detect errors |
| Used When | Testing algorithms before coding |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Why Trace Tables Are Used | Reason |
|---|---|
| Logic Checking | Confirms algorithm works correctly |
| Error Detection | Finds logic and loop errors |
| Exam Requirement | Common in O Level / IGCSE questions |
| Understanding | Makes flow of algorithm clear |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Typical Trace Table Columns | Purpose |
|---|---|
| Step / Line Number | Shows current algorithm step |
| Variable Names | Tracks value changes |
| Condition Result | TRUE / FALSE decisions |
| Output | Records displayed results |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Example Algorithm (Description) | Detail |
|---|---|
| Task | Add numbers from 1 to 3 |
| Variables | total, count |
| Loop | WHILE count ≤ 3 |
| Output | Display total |
| Initial Values | Value |
|---|---|
| total | 0 |
| count | 1 |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Step | count | total | Condition (count ≤ 3) |
|---|---|---|---|
| Start | 1 | 0 | TRUE |
| Loop 1 | 1 | 1 | TRUE |
| Loop 2 | 2 | 3 | TRUE |
| Loop 3 | 3 | 6 | TRUE |
| End | 4 | 6 | FALSE |
| Final Output | 6 |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| How To Complete A Trace Table | Step |
|---|---|
| Step 1 | Write initial variable values |
| Step 2 | Follow algorithm line by line |
| Step 3 | Update variables after each step |
| Step 4 | Record condition results |
| Step 5 | Continue until algorithm ends |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Exam Key Phrases | Use These |
|---|---|
| Trace Table | “Tracks variable values step-by-step” |
| Dry-run | “Manual execution of algorithm” |
| Purpose | “Checks logic without coding” |
| Output | “Final values recorded clearly” |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course