Term
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Definition
| A name is a string of characters used to identify some entity in a program |
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Term
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Definition
| It is a special word of a programming language that cannot be used as a name |
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Term
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Definition
| An address of a variable is a machine memory address with which it is associated |
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Term
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Definition
| It's when more than one variable name accesses the same memory location |
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Term
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Definition
| A type is the range of values a variable can store and the acceptable operations that are defined for variables of that type |
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Term
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Definition
| The value is the contents of the memory cell or cells associated with a variable. Sometimes called r-value |
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Term
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Definition
| Binding is an association between an attribute and an entity |
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Term
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Definition
| Binding time is the time at which binding takes place. |
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Term
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Definition
| It is binding that takes please before run time |
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Term
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Definition
| It is binding that takes place during run time |
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Term
| What is an explicit type declaration? |
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Definition
| An explicit type declaration is a statement in a program that lists variable names and specifies their type |
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Term
| What is implicit type declaration? |
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Definition
| It is when the a variable and its type are associated through default conventions rather than declarative statements |
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Term
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Definition
| It is when memory is taken from a pool of available memory and bound to a variable |
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Term
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Definition
| It is when memory that was bound to a variable is taken back to the pool of available memory |
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Term
| What is the lifetime of a variable? |
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Definition
| The lifetime of a variable is the time during which is is bound to a memory location |
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Term
| What is a static variable? |
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Definition
| It's a variable that has been bound to a memory location before execution and remains bound until the program terminates. Use the word static |
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Term
| What are stack-dynamic variables? |
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Definition
| They are variables whose storage bindings are created when their declaration statement are elaborated, but whose types are statically bound. |
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Term
| What are explicit heap-dynamic variables? |
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Definition
| Explicit heap-dynamic variables are nameless (abstract) memory cells that are allocated and deallocated by explicit run-time instructions written by the programmer (new/delete, malloc/dealloc) |
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Term
| What are implicit heap-dynamic variables? |
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Definition
| They are variable that are bound to heap storage only when they are assigned values. |
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Term
| What is the scope of a variable? |
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Definition
| It is the range of statements in which a variable is visible |
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Term
| What does it mean for a variable to be visible? |
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Definition
| A variable is visible in a statement if it can be referenced or assigned in that statement |
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Term
| A variable is _____ in a program unit or block if it is declared there. |
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Definition
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Term
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Definition
| It is when the scope of a variable can be seen prior to execution. 2 types of static scoping 1. Those that can have nested subprograms, and 2. those that cannot. Static scoping is based on its static parent up to its static ancestor |
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Term
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Definition
| Dynamic scoping is based on the calling sequence of subprograms, not on their spatial relation to each other |
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