Logic Glossary C

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call a module

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to use a module's name to invoke it, causing it to execute

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camel casing

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a naming convention in which the initial letter is lowercase, multiple-word names are run together, and each new word within the name begins with an uppercase letter.

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candidate keys

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columns or attributes that could serve as a primary key in a table

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cardinality

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describes an arithmetic relationship between objects

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cascasing if statement

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a series of nested if statements

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case structure

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a structure that tests a single variables against multiple values, providing separate actions for each logical path.

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catch an exception

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to receive an exception from a throw so it can be handled.

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catch block

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a segment of code written to handle and exception that might be thrown by the try block that precedes it.

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central processing unit

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the computer hardware component that processes data

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CPU

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the computer hardware component that processes data

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character

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a letter, number, or special symbol such as A, 7, or $.

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child class

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a derived class

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child file

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a copy of a file after revision

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class

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a group or collection that objects with common attributes

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class client

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a program or class that instantiates objects of another prewritten class

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class user

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a program or class that instantiate objects of another prewritten class

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class definition

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a set of program statements that define the fields and methods of a class

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class diagram

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a tool for describing a class that consists of a rectangle divided into three sections that show the name, data, and methods of a class.

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class method

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a static method; class methods are not instance methods and they do not receive ad this reference

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client

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a program or other method that uses a method

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closing a file

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an action that makes a file no longer available to an application

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coding the program

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the act of writing the statements of a program in a programming language

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cohesion

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a measure of how a method's internal statements are focused to accomplish the method's purpose

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command line

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the location on a computer screen where entries are typed to communicate with the computer's operating system

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communication diagram

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a UML diagram that emphasizes the organization of objects that participate in a system

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compiler

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software that translates a high-level language into machine language and identifies syntax errors. a compiler is similar to an interpreter; however, a compiler translates all the statements in a program prior to executing them.

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component diagram

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a UML diagram that emphasizes the files, database tables, documents, and other components used by a system's software

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composition

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the technique of placing an object within an object of another class

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compound condition

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a condition constructed when multiple decisions are required before determining an outcome

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compound key

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in a database, a key constructed from multiple columns.

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composite key

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in a database, a key constructed from multiple columns.

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computer file

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a collection of data stored on a nonvolatile device in a computer system

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computer memory

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the temporary internal storage within a computer

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computer system

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a combination of all the components required to process and store data using a computer

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concatenate columns

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to combine database table columns to produce a compounds key

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concatenated key

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in a database, a key constructed from multiple columns

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concurrent update problem

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a problem that can occur when two databse users revise the same record at the same time

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conditional AND operator

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a symbol used to combine decisions so that two or more conditions must be true for an action to occur

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conditional OR operator

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a symbol used to combine decisions so thatany one condition can be true for an action to occur

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constructor

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an automatically called method that instantiates an object

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container

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one of a class of objects whose main purpose is to hold other elements-- for example, a window

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control break

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a temporary detour in the logic of a program for special group processing

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control break field

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a variable that holds the value that signals a special processing break in a program

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control break program

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a program in which a change in the value of a variable initiates special actions or processing

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control break report

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a report that lists items in groups frequently, each group is followed by a subtotal

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conversion

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the set of actions an organization must take to swtich over to using a new program or system

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counter

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any numeric variable used to count the number of time an event has occured

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coupling

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a measure of the strength of the connection between two program methods