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Digital Technology Theory > 2.2 Digital Systems > Flashcards

2.2 Digital Systems Flashcards

1
Q

Operating Systems Manage Resources

A
  • managing peripherals such as input and output devices
  • manages printing using spooling
  • manages backing store
  • file compression
  • disk defragmentation
  • manages memory RAM
  • manages processes
  • manages security
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2
Q

GUI

A

Windows icon menu pointer
Advantages
- easy to navigate
- it’s intuitive
- WIMP
Disadvantages
- requires lots of memory = windows to load
- very slow

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3
Q

Touch Sensitive

A

Smart phones
Advantages
- very intuitive
- easy hand to eye coordination
- better than mouse
Disadvantage
- can get dirty
- unhygienic
- difficult to touch small items

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4
Q

Command Line

A

For professionals (network management)
Advantages
- quick to type commands
- little memory and processing power
Disadvantages
- large number of commands needed
- not suitable for a novice

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5
Q

Menu Driven Interface

A

Uses work through a series of menus to execute routines

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6
Q

Biometrics

A

Body measurements and calculations related to human characteristics

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7
Q

Voice Driven Interface

A

Recognition and interpretation of speed patterns

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8
Q

Application Software

A

Is where things come right off the shelf to fulfil a specific purpose - Microsoft word or data managing

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9
Q

Bespoke Software

A

Software written to perform a task for an individual or a company - stock or custom stuff
Advantage
- organisation controls timings and speed development
Disadvantage
- initial cost is high compared to off the shelf

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10
Q

Process Control

A

Software that manages a process feeding back information from a variety of sources to control input and output

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11
Q

Antivirus Software

A

Scheduled virus software that scans and blocks off harmful viruses
Quarantine = antivirus software moves the infected file to a safe part of the system ensuring no other files get infected
Clean = antivirus software removes the infection from the file instead of deleting it just in case the user needs the file
Deleting = antivirus software deletes the file from the system completely

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12
Q

Task Scheduling

A

A part of a operating system which is used to run commands can be set by the user to run automatically based on circumstances - sending an email or making a backup

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13
Q

Full Backup

A

Every single folder and file on a device or network is copied and saved

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14
Q

Incremental Backup

A

Copies all files that have been created or changed since the last incremental backup

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15
Q

Differential Backup

A

Copies all files that have been created or changed since the last full backup copy

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16
Q

Grandfather Backup

A

A full machine backup performed monthly and held of site

17
Q

Father Backup

A

A full backup done on a weekly basis and held locally

18
Q

Son Backup

A

Daily differential backup

19
Q

USB Flash Drive

A

This media uses flash memory and is portable and lightweight
Lower memory capacity that other backup media and can be used to transfer data from device to device. Suitable as temporary backup

20
Q

External Hard Drive

A

Hard drives store large amounts of data. They are portable, cheap and quite efficient

21
Q

Solid State Media

A

Uses flash memory to store data. Can hold large amounts of data and add more robust as they have no moving parts. Can be very expensive, has an upper limit to how many times it can be read or written to

22
Q

Cloud Storage

A

Storing data and files at a remote location using the internet. When data is sent to be stored on the cloud, it is sent to a server that is hosted by an external company

23
Q

Disaster Recovery Plan

A

In place in case of system failure from a power cut to natural disaster

24
Q

Cloud Computing

A

The on-demand availability of computer system resources especially storage and computing power - AWS
Advantage
- lower set up costs and compatibility issues reduced
Disadvantage
- cloud versions of software is not always the most up to date and an internet connection is required to create, edit, save and retrieve files

25
Q

Software as a Service

A

Most used service, all applications are run through the web browser meaning clients don’t need to download anything - Google docs

26
Q

Platform as a Service

A

The cloud provider has more control managing the hardware potion, the operating system and other elements clients manage the application and data portion - Google app engine

27
Q

Infrastructure as a Service

A

The cloud provider manages the hardware portion such as servers, storage and networking, clients will manage software portion - applications + operating system

28
Q

Cloud Storage

A

Computer data storage available on demand and remotely - google drive
Advantage
- very reliable and cost effective platform - good cloud

29
Q

System Development Cycle

A

Investigation
Analysis
Design
Implementation
Maintenance
Evaluation

30
Q

System Investigation

A

System analyst would investigate the current existing system and create a feasibility report looking at
- Detention of scope of the current system
- Existing hardware and software
- Problems with existing system
- User requirements of the system
- Cost and benefits of introducing a new system

31
Q

System Analysis

A
  • understand what data flow diagram is and be able to interpret one
  • understand what a decision table is
  • understand what a data dictionary is
32
Q

System Design

A
  • hardware
  • software
  • network
  • staff issues
  • security procedures
33
Q

System Implementation

A
  • installing the hardware and software
  • changeover methods - parallel, direct, pilot and phased method
34
Q

System Maintenance

A
  • user guides
  • technical manuals
  • error checking
35
Q

System Evolution

A

Evaluating a new system - to determine weather the new system meets the initial requirements and needs of the company. How the software can now further evolve is also looked at during this stage

Digital Technology Theory (5 decks)

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