​1. What is JDK

​1. What is JDK

1. What is JDK? What is JRE? What are the differences between JDK and JRE? Disscuss how to resolve the errors listed on page 24. (user, path, or OS problems).(chapter 1)
2. Discuss the two truths and a lie on page 32. Why we need to run javac instead of java?
3. Explain the need for program comments(chapter 1)
4. how to correctly swap the values of two variables. Refer to page 61 for the sample code to swap variable contents. (chapter 2)
5. Describe the int, byte, short, and long data types. Using Table 2-2, explain the storage capacity of each type.

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