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: 统计字符串长度 n 和字符 ‘1’ 的个数 count1。 长度为偶数时，count1 必须为偶数，否则不可能。 长度为奇数时，count1 为奇数才可能有中心字符。 最小交换次数 = 对称位置不同的对数 ÷ 2。 遍历前半部分，若 s[i] ≠ s[n-1-i]，则计数器加 1，最后结果 = 计数器 // 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.
