This is an independent topic guide, not the official syllabus. Compare it with the current paper outline and rules published by the examination authority.
01 / UNDERSTANDING
Learning objectives
Study stable sorting, alternating placement and mixed word-number rules, including the difference between a transformation step and its final output. Compare a stable extraction rule with swapping the selected entry into place. Your practical tasks are to mark the prefix or suffix fixed after each displayed step and test the tentative rule on every transition before proceeding. These conceptual objectives are a study framework, not an official question allocation. Demonstrate the distinction with a fresh worked case, including the assumptions that make the answer valid.
02 / UNDERSTANDING
The concept in context
Input-output reasoning reconstructs a sequence of sorting or transformation steps from examples. The objective is to infer a rule that explains every displayed step, then apply it consistently to an unfamiliar input. Identify what becomes fixed at each stage, whether relative order is preserved, and whether numbers and words follow separate priorities.
03 / UNDERSTANDING
A worked learning case
An invented machine repeatedly moves the smallest remaining number to the next unfilled position on the left, preserving the relative order of other entries. For input 42, 15, 31, 8, step one is 8, 42, 15, 31. Step two becomes 8, 15, 42, 31. The final placement sorts the remaining pair.
ORIGINAL EDUCATIONAL PRACTICE
Try it before you check.
Under the stated machine rule, what is step three?
Show the answer and reasoning
8, 15, 31, 42.
After two steps, 8 and 15 are fixed. Of the remaining values, 31 is smaller than 42, so it moves into the third position while 42 shifts right. The operation fixes one additional position; it does not apply an unrelated swap rule to the entire sequence.
Two traps to watch for.
- Inferring alphabetical priority from only one moved word.
- Counting an unchanged display as a required extra transformation.
YOUR TOPIC-SPECIFIC LEARNING MAP
Your revision map
Mark the prefix or suffix fixed after each displayed step.
Test the tentative rule on every transition before proceeding.
Reapply the verified operation to a new mixed sequence.
Explain the idea, apply it to a new situation, then check what changed in your reasoning.
BANKERS TUTORIAL · SOURCE NOTES
Keep the source alongside your notes.
Official links provide subject context and authoritative reference material. This guide’s explanation, scenario and question are original Bankers Tutorial learning content.
- www.ibps.in https://www.ibps.in/wp-content/uploads/Detailed-Notification_CRP-PO-XIV_7.8.24.pdf
For IBPS & RRB preparation, check the current official notice before relying on changing dates, rules or examination requirements.
