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AP® Computer Science Principles · Unit 3 · Topic 3.5

Boolean Expressions: Topic Checklist (Computer Science Principles 3.5)

Specific "I can" statements for Boolean expressions, relational and logical operators, each linked to the study-guide section or practice question that tests it.

Work through the list without notes. If you cannot do a statement, follow the pointer, then come back. Guide = the study guide; Practice = the practice questions.

Understanding

  • I can state that a Boolean value is true or false and that comparisons produce Booleans (Guide: Boolean values and relational operators; Practice: Question 1)
  • I can explain that OR is inclusive and AND needs both operands true (Guide: Logical operators; Practice: Question 5)
  • I can tell = (comparison) apart from ← (assignment) (Guide: Boolean values and relational operators)

Skills

  • I can evaluate expressions with =, ≠, >, <, ≥ and ≤ (Guide: Boolean values and relational operators; Practice: Questions 1 and 6)
  • I can complete a truth table for NOT, AND and OR (Guide: Logical operators; Practice: Question 9)
  • I can evaluate a compound expression by writing the value of each part (Guide: Worked example 1; Practice: Question 2)
  • I can write a range test using AND and the correct boundary operators (Guide: Worked example 2, Task A; Practice: Question 3)
  • I can write a condition from a sentence with brackets and AND/OR (Guide: Worked example 2; Practice: Question 8)

Reasoning

  • I can apply De Morgan’s laws to find an equivalent expression (Guide: Worked example 2, Task C; Practice: Question 4)
  • I can decide whether two expressions are equivalent using a truth table or test values (Guide: Worked example 2, Task C; Practice: Question 7)
  • I can spot errors such as OR instead of AND, or > instead of ≥ (Guide: Common misconceptions; Practice: Question 3)
  • I can test boundary values to check a condition (Guide: Worked example 2, Task A; Practice: Question 3)

When every line is secure, move on. The revision notes are here: revision notes.

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