Lecture 4: Software - 18/1 Flashcards
What are the 4 types of software licenses?
Commercial/proprietary
Shareware/trialware
Freeware
Open source
Pros/cons of commercial/proprietary software license
Pay to use
Pros:
Robust/stable
Feature rich
Customer support
Cons:
Expensive
Usually can’t modify
Pros/cons of shareware/trialware software license
Free for limited time/only with limited features
Pros:
Robust/stable
Feature rich
Customer support
Can try for free
Cons:
Eventually have to buy
Usually can’t modify
Pros/cons of freeware software license
Free, source code not normally available
Pros:
Free
Cons:
Usually can’t modify
Can be buggy
Little/no customer support
Could turn proprietary at any time
Pros/cons of open source software license
Free, source code made available
Pros:
Free
Can modify code
Cons:
Can be buggy
Little/no customer support
What are the 5 interface types?
Command line interface (cli)
Graphical user interface (GUI)
Menu-driven interface (mdi)
Form-based interface (fbi)
Natural language interface (nli)
Command line interface (cli)
User prompted to enter text-based commands, computer responds with text-based output (computer programmers, systems administrators)
Graphical user interface (GUI)
User uses keyboard or mouse, computer responds with graphical output (operating system)
Menu-driven interface (mdi)
Computer provides a set of choices, user responds with choice (kiosk/ATM)
Form-based interface (fbi)
User inputs a value into a field based on a range of possible values (setting font size/type)
Natural language interface (nli)
User types in a question, computer responds with an answer (search engines)
Primary types of software
Spreadsheets, word processing, data management, presentation, graphics, personal info management, personal finance, web authoring, etc.
What is a software suite?
Different software bundled together to accomplish different aspects of a common application
Example: Microsoft Office
What is an operating system?
System software with special privileges that allow it to manage hardware and other software; provides interface between user and hardware
What is an operating system kernel?
Software that is part of the OS that provides interface between application and hardware
Types of operating system kernels
Monolithic kernel
Microkernel
Hybrid kernel
Monolithic kernel
The entire OS is kernel space
Microkernel
Only part of the OS is kernel space
Hybrid kernel
Can adapt depending on number of tasks
