Reverse last two characters with space
Company: IBM
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: nan
Interview Round: Technical Screen
## Problem
Given a non-empty string `s` with length at least 2, output a new string consisting of the last two characters of `s` in reverse order, separated by a single space.
### Input
- A string `s` (length `>= 2`).
### Output
- A string of the form: `s[last] + " " + s[second_last]`.
### Example
- Input: `"bat"`
- Output: `"t a"`
### Edge Cases
- `s` may contain letters, digits, or other characters; treat it as a raw character array/string.
- Example: `"ab" -> "b a"`.
Quick Answer: This question evaluates basic string manipulation and character indexing skills, including handling of edge cases when treating input as a raw character array. Commonly asked in Coding & Algorithms interviews, it tests practical implementation ability and attention to indexing and boundary conditions, classifying the task as a practical application in the string-manipulation domain.
Return last character, a space, then second-last character.
Constraints
- Inputs are Python literals matching the function signature.
- Return a deterministic exact-match value.
Examples
Input: ('bat',)
Expected Output: 't a'
Explanation: Prompt example.
Input: ('ab',)
Expected Output: 'b a'
Explanation: Minimum length.
Input: ('x9!',)
Expected Output: '! 9'
Explanation: Raw characters.
Hints
- Model object-style prompts as operation streams when needed.
- Handle empty and boundary cases before the main logic.