Lecture 13 Exam 2 Review

Joseph Haugh

University of New Mexico

Exam 2 Topics: Basics

• Variables
  • What do variables store?
  • Can they be mutated?
• If statements
  • What is the syntax of an if statement?
  • Is the else branch mandatory?
• Indentation
  • Does indentation effect semantics in Java?
  • Why do we care about indentation?
• Data types
  • What are some primitive types in Java?
  • What information does a type give us?

Exam 2 Topics: Basics

• Expressions
  • Statement vs expression
  • PEMDAS
• Type casting
  • What is it?
  • Is it always safe?
• Relational operators
• Boolean operators

Exam 2 Topics: Loops

• While loops
  • What is the syntax of a while loop?
  • What is are the semantics of a while loop?
  • What scenarios should we us a while loop in?
• For loops
  • What is the syntax of a for loop?
  • What is are the semantics of a for loop?
  • What scenarios should we us a for loop in?
• Do While loops
  • What is the syntax of a do while loop?
  • What is are the semantics of a do while loop?
  • What scenarios should we us a do while loop in?

Exam 2 Topics: Functions

• Functions
  • What is the syntax of a function?
  • Why do we use functions?
• Return keyword
  • What does the return keyword do?
  • What happens if we forget it?

Exam 2 Topics: Strings

• Strings
  • How do you get a character from a String?
  • Can you mutate a String?
  • What does (+) do on Strings?
  • What is 1 + 2 + "hello" + 3 * 4 evaluate to?
    • 3hello12
  • What do single quotes (' ') denote in Java?
  • What do double quotes (" ") denote in Java?
  • Should you use == or equals on Strings?

Exam 2 Topics: Switch

• Switches
  • Switch expression vs statement
  • What is the use case of a switch?
  • What types can you switch on?
  • What does the default keyword do?
• Switch expression
  • What is the syntax of a switch expression?
  • What are the semantics of a switch expression?
• Switch statement
  • What is the syntax of a switch statement
  • What are the semantics of a switch statement

Exam 2 Topics: Intermediate

• Nested ifs
• if else if else
  • What does mutually exclusive choice mean?
• Scoping
  • What is scope?
  • When does a variable go out of scope?
• == vs equals
  • When should you use one or the other?
• Break statement
  • What does the break statement do?
• Nested loops
• Primitive vs reference types

Exam 2 Topics: Arrays

• Arrays
  • How do you create an array?
  • Can arrays hold different types of data?
  • Can you change the length of an array?
  • Can you change the elements inside an array?
  • What index does an array start at?
  • What index does an array end at?
  • What happens if you try to access an array with a negative index?