Module 5 Study Guide

Learning Objectives

• Understand what a variable is
• List the six attributes of a variable and explain what the name, address, value, and type attributes are
• Distinguish the four variable lifetime categories of static, stack-dynamic, explicit heap-dynamic, and implicit heap-dynamic
• Give examples of variables with each of the four variable lifetime categories
• Explain the regions where memory is allocated for each of the four variable lifetime categories
• Explain what variable with different lifetimes are used for, and identify languages that provide variables in each variable lifetime category
• State the definitions of scope and visibility
• Explain how to determine the scope of declarations and the visibility of variables under static or dynamic scope
• Execute programs by hand and correctly determine the output when it depends on static or dynamic scope
• Explain the difference between local, non-local, and global variables
• Explain what a block is
• Explain the difference between scope and lifetime
• Define the referencing environment at a point in a program
• Distinguish between a sub-program being active and not active, and explain the relevance of this for static and dynamic scope
• Explain what a named constant is and contrast it with a literal constant and a variable

Resources

• CPL 5.5-5.8
• Slides: Lam

Lab

Please complete the lab for this week in class.

Deliverables

The test for this module will take place on Canvas on Friday. You will have an opportunity to re-take a different version of the same test next week. If you choose to do the re-take, your grade for this module will be the higher of the two scores.