1. Explain the electrical configuration of a data center, including the UPS.
2. What types of elements are used in FEA?
3. What is a bridge wave rectifier?
4. How can you handle vendor development?
5. Pair Sum Problem Statement You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'. Note: Each pair should be ordered such that the first value is less than or equal to the second value. The list of pairs should be sorted in non-decreasing order based on their first values. If two pairs have the same first value, the pair with the smaller second value should come first. Input: N S ARR[0] ARR[1] ... ARR[N-1] Output: C x1 y1 x2 y2 ... Example: Input: N = 5, S = 7 ARR = [3, 1, 2, 4, 5] Output: [2, 5] [3, 4] Constraints: 1 ≤ N ≤ 103 -105 ≤ ARR[i] ≤ 105 -2 * 105 ≤ S ≤ 2 * 105 Time Limit: 1 sec Note: You don't need to print the output; just implement the logic to return the required result.
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