C#.NET — After fixing spacing in the array creation (new int[]), what does this program print? namespace CuriousTabConsoleApplication { class SampleProgram { static void Main(string[] args) { int[] arr = new int[] { 1, 2, 3, 4, 5 }; fun(ref arr); } static void fun(ref int[] a) { for (int i = 0; i < a.Length; i++) { a[i] = a[i] * 5; Console.Write(a[i] + " "); } } } }
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A1 2 3 4 5
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B6 7 8 9 10
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C5 10 15 20 25
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D5 25 125 625 3125
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E6 12 18 24 30
Answer
Correct Answer: 5 10 15 20 25
Explanation
Introduction / Context:The code multiplies each element of an integer array by 5, then prints the updated values. The ref keyword allows the method to receive a reference to the array, although arrays are reference types already.
Given Data / Assumptions:
- Initial array: {1, 2, 3, 4, 5}.
- Inside fun, each element is reassigned to element * 5.
- Console.Write prints each updated value followed by a space.
Concept / Approach:Arrays are reference types; passing with ref is not required for modifying elements, but it permits reassigning the array variable itself. Here, only element values are changed.
Step-by-Step Solution:
a[0] = 1 * 5 = 5 → print 5.a[1] = 2 * 5 = 10 → print 10.a[2] = 3 * 5 = 15 → print 15.a[3] = 4 * 5 = 20 → print 20.a[4] = 5 * 5 = 25 → print 25.Verification / Alternative check:Run the loop manually or with a quick console application.
Why Other Options Are Wrong:
- 1 2 3 4 5: Shows the original values, not multiplied.
- 6 7 8 9 10 / 6 12 18 24 30: Do not match multiplication by 5.
- 5 25 125 625 3125: Represents powers of 5, not linear scaling.
Common Pitfalls:Confusing element modification with creating a new array or power growth.
Final Answer:5 10 15 20 25