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Exam 70-483 topic 2 question 25 discussion

Actual exam question from Microsoft's 70-483

Question #: 25
Topic #: 2

You are developing an application.
The application contains the following code segment (line numbers are included for reference only):

When you run the code, you receive the following error message: "Cannot implicitly convert type 'object'' to 'inf. An explicit conversion exists (are you missing a cast?)."
You need to ensure that the code can be compiled.
Which code should you use to replace line 05?

A. var2 = ((List<int>) array1) [0];
B. var2 = array1[0].Equals(typeof(int));
C. var2 = Convert.ToInt32(array1[0]);
D. var2 = ((int[])array1)[0];

Show Suggested Answer

Suggested Answer: A 🗳️
Make a list of integers of the array with = ( (List<int>)arrayl) then select the first item in the list with [0].

by Nyxius at April 29, 2019, 11:56 a.m.

Comments

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Nyxius

Highly Voted 6 years, 2 months ago

Wrong, you cannot convert ArrayList to List<T>. Correct answer is C. Convert.ToInt32(array1[0]);

upvoted 53 times

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Vodkaalk

Highly Voted 5 years, 9 months ago

I tried. It's C

upvoted 25 times

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DaGrooveNL

Most Recent 4 years, 5 months ago

FINAL ANSWER: C

upvoted 1 times

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johan2020

4 years, 7 months ago

c. is correct

upvoted 3 times

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mohmou

4 years, 11 months ago

A is wrong the complier say: Cannot convert type 'System.Collections.ArrayList' to System.Collections.Generic.List<int>'

upvoted 2 times

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Jannie

5 years ago

May whoever oversees these comments update the answers because this only confuses us trying to test our knowledge. Thanx!

upvoted 5 times

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TonyBezerra

5 years, 3 months ago

I tried and the right answer is C.

upvoted 7 times

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saurin

5 years, 3 months ago

Ans is C ArrayList arr = new ArrayList(); int a = 10; int b = 20; arr.Add(a); b = ((List<int>)arr)[0]; // This return error b =Convert.ToInt32(arr[0]);

upvoted 8 times

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natsk8freak

5 years, 6 months ago

The correct answer is definitely C. Just confirmed in the debugger.

upvoted 13 times

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dosper

5 years, 10 months ago

C is the correct answer.

upvoted 18 times

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supersunny

5 years, 11 months ago

A. is correct.

upvoted 1 times

noussa

4 years, 5 months ago

C is the correct answer. var2 is a simple int. you can't return a list <int> !!

upvoted 2 times

noussa

4 years, 5 months ago

The correct answer is always C. but I didn't pay attention to what A represents so the right explanation is that you can't cast an ArrayList to List<int>

upvoted 1 times

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