Multiple choice technology programming languages

if(check4Biz(storeNum) != null) {} Referring to the above, what datatype could be returned by method check4Biz()?

  1. Boolean

  2. int

  3. char

  4. float
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A Correct answer
AI explanation

To answer this question, we need to consider the given code snippet:

if(check4Biz(storeNum) != null) {}

In this code, the method check4Biz() is being called with the parameter storeNum. The code then checks if the returned value of check4Biz() is not null.

Based on this information, we can deduce that the return type of check4Biz() must be some kind of reference type, as null can only be assigned to reference types in Java.

Looking at the given options:

A) Boolean - This option is correct because Boolean is a reference type, and it can be compared to null.

B) int - This option is incorrect because int is a primitive data type, and it cannot be compared to null.

C) char - This option is incorrect because char is a primitive data type, and it cannot be compared to null.

D) float - This option is incorrect because float is a primitive data type, and it cannot be compared to null.

Therefore, the correct answer is A) Boolean. The return type of the check4Biz() method could be Boolean, which is a reference type that can be compared to null.

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