Wipro talent Array Based Question.

1) Simple Encoded Array: Maya has stored few confidential numbers in an array (array of int). To ensure that others do not find the numbers easily, she has applied a simple encoding.
Encoding used: Each array element has been substituted with a value that is the sum of its original value and its succeeding element’s value.
i.e. arr[i] = arr[i] + arr[i+1]
e.g. value in arr[0] = original value of arr[0] + original value of arr[1]
Also note that value of last element i.e. arr[last index] remains unchanged.

Example:
If the original array is –
{2, 5, 1, 7, 9, 3}
The encoded array would be –
{7, 6, 8, 16, 12, 3}

Provided the encoded array, you are expected to find the –
a) First number (value in index 0) in the original array
b) Sum of all numbers in the original array

The prototype of the function is:
public static void findOriginalFirstAndSum(int[] input1);
where input1 is the encoded array.
The method is expected to –

• find the value of the first number of the original array and store it in the member output1 and
• find the sum of all numbers in the original array and store it in the member output2

Assumption(s):

• The array elements can be positive and/or negative numbers

Example 1:
Original array = {2, 5, 1, 7, 9, 3}
Encoded array = {7, 6, 8, 16, 12, 3}
First number in original array = 2
Sum of all numbers in original array = 27
NOTE: Only the “Encoded array” will be supplied to the function and it is expected to do the processing to find the expected result values.

原文链接：Wipro talent Array Based Question.