IS 4410 Exam one Notes.docx - Accurate Good info is derived...

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Accurate: Good info is derived from accurate data. Barely Sufficient: Data needs to be sufficient for the purpose for which it was generate, but just barely so. Not more. Byte: A Character of data Challenges of mobile devices at work: -advantages: cost savings, employee satisfaction, less training. -Disadvantages: data loss or damage, loss of control, compatibility problems, risk of infection, greater support costs. Characteristics of Data: Accurate, Timely, Relevant, Barely Sufficient, and worth its costs Characteristics of the Cloud: pooled, economies of scale, elastic Cloud Services from cloud vendors: content delivery network (CDN) – Many different geographical locations and makes data available on demand. Collaboration and team communication: Synchronous: Shared calendars, Word, conference calls, screensharing. Asynchronous: email, discussion forums, and team surveys. Collaboration IS/Collaboration systems: an information system that supports collaboration. -Complete the work, on time, on budget. -growth in team capability -meaningful and satisfying experience Columns: bytes are grouped into columns, also known as fields Competitive structure and value chain: a value chain is a network of value- creating activities. Organizations analyze and come up with a competitive strategy. They then need to organize and structure the organization to implement that strategy. -Cost and industry-wide = Lowest across the industry (wal-mart) -Differentiation and industry-wide = better product/service across the industry (Neiman Marcus) -Cost and Focus = lowest cost within an industry segment (payless shoes) -Differentiation and focus = better product/service within an industry segment (Tiffany & Co.) Computer Data: represented by bits (8-bit chunks=byte) because they are easy to represent physically. The cache and main memory are volatile, meaning their contents are lost when power is off. Magnetic and optical disks are nonvolatile, meaning their contents survive when power is off. - Data= characters, images, etc. - Bytes: bits grouped into 8-bit chunks - Kilobyte: K. 1,024 bytes - Megabyte: MB 1,024 Kilobytes - Gigabyte: GB 1,024 megabytes - Terabyte: TB 1,024 gigabytes - Petabyte: PB 1,024 terabytes - Exabyte: EB 1,024 Petabytes - Zettabyte: ZB 1,024 Exabytes Database Applications: provide security, data consistency, and special purpose processing. -Details: forms, queries, reports, application programs. Database App forms: view data; insert new, update existing, and delete existing Database App queries: search based upon data values provided by the user. Database app reports: structured presentation of data using sorting, grouping, filtering, and other operations. Data integrity issue: Data integrity is the maintenance of, and the assurance of the accuracy and consistency of, data over its entire life-cycle. A table that has data integrity problems will produce incorrect and inconsistent results. DBMS: Database Management system is a program used to create, process, and administer a database. Details of Database Apps: main DBMS products: DB2 from IBM, Access

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