J2EE Onsite Skype Interview 2

1. Pass by Value vs Pass by Reference !!!!

2. How to make a immutable class

3. Difference between List Set and Map

4. How to commit code in Git

5. What is the difference between fetch and pull in Git

6. What is difference between snapshot version and release version.

7. How to make a compile time dependency in Maven

8. What is the difference between final finally and finalize?

9. What is static in Java?

J2EE Onsite Skype Interview 1

Calculate Total Price Exercise

Accept 3 inputs from the user:

● How many items

● Price per item

● 2-letter state code

Output the total price. Give a discount based on the total price, add state tax based on the state and the discounted price.

Order Value	Discount Rate
$1000	3%
$5000	5%
$7000	7%
$10000	10%
$50000	15%

State	Tax Rate
UT	6.85%
NV	8.00%
TX	6.25%
AL	4.00%
CA	8.25%

Acceptance Tests:

First Test

When an item price is 493.87

And an item quantity is 15

And a state is CA

Then the total price is 7,457.87

Second Test

When an item price is 1,493.87

And an item quantity is 825

And a state is UT

Then the total price is 1,119,335.32

Implement Test Driven Development Methodology

• 必须知道什么是TDD以及TDD的Best Practice
• 得分点: 分成两个文件夹Test 和 Java
• 得分点: 先写测试
• 得分点：测试类名必须是XXXTest.java
• 得分点：测试类和被测试类必须在同一个package里面，例如model
• 熟悉JUnit API了解 assertEquals方法如何测试double类型
• 计算折扣的业务逻辑非常容易搞错
• floating point numbers are not perfectly precise
• price 设计成 int 表示美分也是也是一个重要的点