Exam 70-483 topic 1 question 17 discussion

Actual exam question from Microsoft's 70-483

Question #: 17
Topic #: 1

You are implementing a method named Calculate that performs conversions between value types and reference types. The following code segment implements the method. (Line numbers are included for reference only.)

You need to ensure that the application does not throw exceptions on invalid conversions.
Which code segment should you insert at line 04?

A. int balance = (int) (float)amountRef;
B. int balance = (int)amountRef;
C. int balance = amountRef;
D. int balance = (int) (double) amountRef;

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Suggested Answer: A 🗳️

by Idoudist at March 14, 2020, 5:28 p.m.

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misbelieving

3 years, 8 months ago

A: (float) unboxes the float from object, (int) casts the float to int

upvoted 1 times

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5 years, 2 months ago

correct , (float) amountRef convert object to float (int) (float) amountRef convert (float) amountRef to int , this way we make sure that code does not throw exception by directly casting amountRef to int , B false

upvoted 3 times

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