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22 Cards in this Set
- Front
- Back
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Performs the fundamental task needed to manage computer resources (two types - operating & utility)
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Systems Software
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Consist of programs that tell the computer what steps the user wants carried out (examples are word, excel, lawson)
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Application Software
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A Group of bits
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Bytes (each byte used to signify a character, number)
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Group of bytes
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Field (contains unit of data about some entity)
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Group of Fields
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Record (Field contains info pertaining to an entity)
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Group of records
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File
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Integrated set of software tools superimposed on the data files helps maintain integrity of underlying database. Enables users to have different views of the same data as a function.
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Database Management System (DBMS)
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Consist of layouts of tables & constraints on entering new records
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Schema
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Contains physical and logical characteristics of every data element in database
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Data Dictionary
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Highly structured and if properly followed can help organization deploy maintainable well-documented systems with functionality that was intended
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Systems development life-cycle approach (SDLC)
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Systems Development life cycle (SDLC)
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1. Definition
2. Design 3. Development 4. Implementation 5. Maintenance |
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Alternative approach to application development, involves creating a working model of system requested, demonstrating it for user, obtaining feedback & making changes to underlying code
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Prototyping
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Applies the computer to software design & development
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Computer-aided software engineering (CASE)
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Combines data and related procedures into object
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Object-oriented programming (OOP)
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Software development process involving iterative development, construction of prototypes and use of CASE
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Rapid application development (RAD)
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Developing specifications regarding input, processing, internal controls and security measures, programs, procedures, output, and databases
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Systems design
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What happens during Definition Stage of Systems development life cycle (SDLC)
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Proposal to IT
Feasibility studies |
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What happens during Design on Stage of Systems development life cycle (SDLC)
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Logical Design (Mapping flow of storage)
Physical Design (Planning interactions of new code) |
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What happens during Development Stage of Systems development life cycle (SDLC)
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Write program code
Prototyping |
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What happens during Implementation Stage of Systems development life cycle (SDLC)
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Parallel Operation
Cutover Conversion (old shut down; new takes over) Pilot conversion Phased conversion |
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What happens during Maintenance Stage of Systems development life cycle (SDLC)
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Program change controls
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Manages situations in which two or more programs or users attempt to access a file or database simultaneously. The purpose is to maintain data integrity
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Concurrency control
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