Download Computer Science: An Overview (11th Edition) by J. Glenn Brookshear PDF

By J. Glenn Brookshear

Computer technology: An Overview makes use of huge insurance and transparent exposition to offer an entire photograph of the dynamic computing device technology box. available to scholars from all backgrounds, Glenn Brookshear makes use of a language-independent context to inspire the advance of a realistic, sensible figuring out of the sector. an outline of every of the $64000 parts of desktop technological know-how (e.g. Networking, OS, machine structure, Algorithms) presents scholars with a basic point of skillability for destiny courses.

The Eleventh Edition good points new contributing authors (David Smith — Indiana college of PA; Dennis Brylow — Marquette University), new, glossy examples, and up to date insurance according to present know-how.

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Extra resources for Computer Science: An Overview (11th Edition)

Sample text

For example, a logical record containing information about an employee would probably consist of fields such as name, address, employee identification number, etc. Sometimes each logical record within a file is uniquely identified by means of a particular field within the record (perhaps an employee’s identification number, a part number, or a catalogue item number). Such an identifying field is called a key field. The value held in a key field is called a key. Logical record sizes rarely match the physical record size dictated by a mass storage device.

4. a. If the output of an AND gate is passed through a NOT gate, the com- bination computes the Boolean operation called NAND, which has an output of 0 only when both its inputs are 1. The symbol for a NAND gate is the same as an AND gate except that it has a circle at its output. The following is a circuit containing a NAND gate. What Boolean operation does the circuit compute? Input Input b. If the output of an OR gate is passed through a NOT gate, the combi- nation computes the Boolean operation called NOR that has an output of 1 only when both its inputs are 0.

Given their compact physical size, these cards conveniently slip into slots of small electronic devices. Thus, they are ideal for digital cameras, smartphones, music players, car navigation systems, and a host of other electronic appliances. File Storage and Retrieval Information stored in a mass storage system is conceptually grouped into large units called files. A typical file may consist of a complete text document, a photograph, a program, a music recording, or a collection of data about the employees in 33 34 Chapter 1 Data Storage a company.

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