Just finished 26NG IBM OA, the overall experience can be described in two words: stable and routine. The format is a typical IBM online test on the HackerRank platform, with two coding questions and plenty of time. The questions themselves are not tricky and tend to focus on conventional data structures and algorithm applications, but if you want to get AC in one go, it will still test your proficiency. Below is a brief review of the overall experience and some details.
26NG IBM OA Question 1
Q1: For each query, find the sum of the number of all possible square subgrids. There are (r−a+1)(c−a+1) kinds of squares with side length a, with a ranging from 1 to min(r,c). Simplify the summation formula and return the result directly in O(1) calculation.
26NG IBM OA Question 1
Q2: Count the string length n and the number of characters ‘1’ count1. When the length is even, count1 must be even, otherwise it is impossible. When the length is an odd number, there may be a center character only if count1 is an odd number. Minimum number of exchanges = number of pairs with different symmetry positions ÷ 2. Traverse the first half, if s[i] ≠ s[n-1-i], then the counter increases by 1, and the final result = counter // 2.
Instead of trying and making mistakes on your own, it’s better to pass it once and for all
In summary, this IBM 26NG OA is not very difficult, but stable performance is really key. It’s not that many students don’t know how to do it, but they get stuck on details, boundary conditions, and debugging, and end up making mistakes in places that shouldn’t be wrong. If you are preparing for OA from IBM or other major manufacturers, such as Hackerrank / CodeSignal platform exams such as Amazon, Meta, and TikTok, it is really important to be familiar with the real exam rhythm in advance. We have long-term supply to major North American manufacturers OA practical assistance Support covers school recruitment, NG, Intern and social recruitment positions, from problem analysis to on-the-spot rhythm control, with full-process assistance.
