Update java-multiple-choice-questions-answers.md

Author: learning-zone

java-multiple-choice-questions-answers.md

@@ -303,6 +303,9 @@ D. p4
 D. P4
 ```
 **Explanation**: Type mismatch: cannot convert from double to float
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 #### Q. How many instance initializers are in this code?
 ```java
@@ -361,6 +364,10 @@ D. The code compiles but throws an exception at runtime
 ```
 C. The code does not compile.
 ```
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 #### Q. Which two primitives have wrapper classes that are not merely the name of the primitive with an uppercase letter?
 A. byte and char  
 B. byte and int  
@@ -410,6 +417,9 @@ D. None of the above; they all compile
 B. double num = 2._718;
 ```
 **Explanation**: Underscores are allowed between any two digits in a numeric literal. Underscores are not allowed adjacent to a decimal point
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 #### Q. Which of the following is the output of this code, assuming it runs to completion?
 ```java