Degree Program in Computer Network and System Administration

SAT1200 Ch 1 notes
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assignment

from instructor's slide show:
 
1.2    What is a Computer?
§Computer
–Device capable of performing computations and making logical decisions
–Computers process data under the control of sets of instructions called computer programs
§Hardware
–Various devices comprising a computer
–Keyboard, screen, mouse, disks, memory, CD-ROM, and processing units
§Software
–Programs that run on a computer

1.3 Computer Organization

  • divided into six categories:
    1. input unit: obtains information from input devices (keyboard, mouse)
    2. output unit: outputs information (to screen, to printer, to control other devices)
    3. memory unit: rapid access, low capacity, stores input information
    4. arithmetic and logic unit (ALU): performs arithmetic calculations and logic decisions
    5. central processing unit (CPU): supervises and coordinates the other sections of the computer
    6. secondary storage unit: cheep, long-term, high-capacity storage; stores inactive programs

1.6 Machine Languages, assembly languages and high level languages
 
machine Languages
assembly languages (translated via assemblers)
high level languages (translated via complilers)
1.7 Fortran, COBAL, Pascal and Ada
Fortran: developed by IBM in 1950's; used for scientific and engineering applications that require complex mathematical computations
COBAL: developed in 1959 by computer manufacturers, the gov. and industrial computer users; used for commercial applications that require precise and efficient manipulation of large amounts of data
Pascal: developed by Professor Niklaus Wirth in 1971; designed for teaching structured programming
Ada: developed under the sponsorship of US DOD during 70's and '80s; able to multi task

1.9 C Standard Library
  • C programs consist of pieces/modules called functions
    • a programmer can create his own functions
    • programmers will often use the C library functions
    • avoid re-inventing the wheel

1.11 Java

  • Java is used to:
    • create web pages w/dynamic and interactive content
    • develop large-scale enterprise applications
    • enhance the functionality of web servers
    • provide apps for devices
  • Java How to Program
    • closely followed the development of Java by Sun
    • teaches first year programming students essentials: graphics, images, animation, audio, video, database, networking, multithreading, collaborative computing

1.12 BASIC, Visual Basic, Visual C++, Visual C# and .NET
BASIC: developed in mid 60s
Visual Basic: intro by MS in 1991 to simplify process of making windows apps
Visual Basic, Visual C++ and Visual C# : designed for MS's .NET programming platform
1.14 Typical C Program Development Environment
  • Phases of C++ Programs:
    • Edit
    • Preprocess
    • Compile
    • Linke
    • Load
    • Execute

1.19 Web Resources