public int getTwiceSumOf1stAnd2nd(int[] nums)

Given an array, all of whose lengths are at least 2,
return twice the sum of the first and second elements.

Create a variable called sum and assign it the sum of the first two elements.
Multiply sum by 2.
Return that product.

public int getTwiceSumOf1stAnd2nd(int[] nums) {
  int sum = nums[0] + nums[1];
  int val = sum * 2;
  return val;
}