UNIT 1.1 Computer Flashcards
Is an electronic device that accepts data from the user, processes it, produces
results, displays them to the users, and stores the results for future usage.
Computer
Is a collection of unorganized facts & figures and does not provide any further information
regarding patterns, context, etc.
Data
It means “unstructured facts and figures”.
Data
Is a structured data i.e. organized meaningful and processed data. To process the
data and convert into information, a computer is used.
Information
Refers to mechanical device that makes up computer
Hardware
It consists of interconnected electronic devices that we can use to control computer’s operation,
input, and output.
Computer Hardware
Is a collection of several components working together
Computer Hardware
A set of instructions that drives computer to do stipulated tasks
Program
It operates directly on hardware devices of computer. It provides a platform to
run an application. It provides and supports user functionality. i.e Windows
System Software
Is designed for benefit of users to perform one or more tasks. i.e Powerpoint
Application Software
Is a tool used for processing data into information
Computer
The list of instructions that the computer must follow to
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be able to process data into information
Program or Software
The procedure of developing the detailed instructions for the computer
Programming
What are the five-step process of programming?
- Define the problem
- Design the solution/program
- Code the program
- Test the program
- Document the program
It means that there should be clear understanding of the problem
Problem Definition Step
the Problem Definitiion Step requires performing the following:
- Specify program objectives and identify the users of the program.
- Specify the output requirements.
- Specify the input requirements.
- Specify processing requirements.
- Study feasibility of implementing the program.
- Document the analysis.
In designing the program, the following steps are done:
- Determine the program logic through top-down approach and modularization, using
hierarchy charts. - Design details using pseudo-code and /or flowcharts.
- Test design with a structural walkthrough. Structural walkthrough consists of
reviewing process with other programmers and system analyst and scrutinize
(“walkthrough”) the programmer’s work.
Is the step which translates the logic of the program based on the pseudo-code
(algorithm) or flowcharts into a high-level programming language using the syntax and
semantics of the specific language.
Program Coding
It consists of desk checking, debugging, and running real data to make sure that
the program works.
Program Testing
Is just reading through or checking the program manually to
ensure that it is free from errors and the logic works.
Desk Checking
It means detecting, locating, and
removing errors in the computer program.
Debugging
An Error that can be a typographical error or incorrect format of the statement used.
Syntax Error
Errors that are
caused by incorrect use of control structures.
Logic Error
It consists of the written descriptions of what the program is all about
and how to use it.
Documenting a program
What are the steps of documentation?
- Write user documentation
- Write operator documentation
- Write program documentation
