Core Java – Page 4 – Sharp: NCLEX, Java & Python

Java: Variables and Data Types

How would you explain a common mistake when assigning values to variables in an interview?

How would you explain the autoboxing trap in `Integer quantity = null; int count = quantity;` in an interview?

Why is `==` risky when comparing two `Integer` objects?

When might you choose BigDecimal over double for prices?

How does int differ from long in Java?

How would you explain a common beginner mistake when using = and == in a Java interview?

Why is variable naming important in Java?

When should you use long instead of int for quantities?

What happens if you call a method not defined in a superclass?

How does compile-time access differ from runtime dispatch?