topic 1 Flashcards
Outline problems that may arise from the installation of new hardware and software in the office.
Users/employees might be afraid of these changes
Data migration problems;
Employee efficiency may drop;
As they learn to use the new system;
ssue of compatibility with legacy software/hardware;
So features of new software/hardware may not work correctly;
Identify two possible compatibility issues as a part of data migration.
Language differences/different character set;
Different conventions of representing various data/currencies, dates, etc.;
Incompatible software/incompatible hardware;
identify three consequences of inadequate testing.
software not meeting user requirements
Can lead to end user dissatisfaction;
Can lead to reduced (employee) productivity;
Can lead to decreased reliability of the organization;
Can lead to software which is not appropriate for the purpose
describe the role of a router in this network.
controls the flow of data in the network;
inspects address of data packets;
directs to the appropriate network path
securely transmits data packets (across that path toward the intended destination);
State the purpose of technical documentation provided with software.
Technical documentation explains how to install software;
Technical documentation describes the hardware configuration
Describe one method by which systems requirements can be obtained from the stakeholders.
Interviews ‘
Direct observation
Outline one reason for providing a prototype for this new system.
Allows stakeholders to gain an idea of how the system would be/work/look;
so they can provide feedback / suggest improvements;
Define the term peripheral.
A piece of hardware device that is externally attached connected to the computer system
Describe two possible causes of data loss.
Malicious activities;
Natural disasters
Malware/viruses/spyware/worms;
Human error;
identify two features that could be used to improve the accessibility of the new user interface.
Touch screens;
Voice recognition;
Text-to-speech;
Braille keyboard
A colour-blind option
Large font option;
Outline backup strategies that may be used to limit data loss.
off-site/cloud backup;
mirrored system ( duplicate copy to be used in the event the main system fails;)
Outline reasons testing should take place at every stage of the development process.
To prevent the end user being dissatisfied with the final system;
Testing is important to enable early discovery of errors;
to reduce time delay/ using more resources / avoid higher cost;
Identify two reasons why patches may be necessary for an operating system.
Allows bugs/error in operating system to be repaired;
Allows new features to be added to operating system
Allows compatibility issues to be improved;
identify two methods that can be used to obtain these patches.
Automatic patches/updates sent (via internet);
User requested updates (via internet);
Patches sent on CD/DVD/memory stick;
Define the term bit.
Binary digit;
OR
(Minimal) unit of storage that can be set to 0 or 1
Name some application software
Word processors
* Spreadsheets
* Database Management Systems (DBMS)
* Email clients
* Web browsers
* Computer Aided Design (CAD)
* Graphic Processing Software
how many characters can be store in 8 bits
2^8 or 256
state why hexadecimal numbers are frequently used in computing.
Hexadecimal numbers are used for shorter representation of data because a (modern) byte can be represented exactly by two hexadecimal digits;
State the number of bits used to represent a non-primary colour, such as yellow.
24
State the maximum number of colours that can be represented in a computer pixel.
256 × 256 × 256
2^8^3
State the function of the control unit (CU) in the central processing unit (CPU).
It decodes the instructions and controls all the other internal components of the CPU to make it work;
State the purpose of persistent storage on the computers.
To store programs / files / data in a non-volatile device so it isn’t lost;
Stores more data as it has a larger capacity;
define Microprocessor
an integrated circuit that contains
all the functions of a central processing unit of a
computer
