CS 430/530 Quiz – October 7, 2004

Name____________________ Possible points: 10 Earned points : ____

Note: the numbers in parentheses indicate the points you can earn for each question. Those with only 1 point are right or wrong (no part credit).

1. What is the definition of a reserved word? (1)

A reserved word is a special word that cannot be used as a user-defined name slide 9

2. What is determined when you specify a type of a variable? (2)

the range of values of variables and the set of operations that are defined for values of that

type; in the case of floating point, type also determines the precision

3. “A binding is an association, such as between an attribute and an entity, or between an operation and a symbol.” What are the five times when binding can occur? (5)

Language design time --e.g., bind operator symbols to operations

Language implementation time --e.g., bind floating point type to a representation

Compile time --e.g., bind a variable to a type in C or Java

Load time --e.g., bind a FORTRAN 77 variable to a memory cell (or a C static variable)

Runtime --e.g., bind a nonstatic local variable to a memory cell

slide 15

4. What does it mean for a binding to be static? (1)

A binding is static if it first occurs before run time and remains unchanged throughout

program execution. slide 16

5. “The scope of a variable is the range of statements over which is is visible.” Using this definition, provide a definition for the non-local variables of a program unit? (1)

The nonlocal variables of a program unit are those that are visible but not declared there

NOTE: they are not necessarily visible throughout the entire program.