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Operating Systems
Operating systems, both proprietary and open-source, include those produced by Microsoft, Linux, and Apple Mac
4,423 Questions
How is a hemoperfusion system used?
A hemoperfusion system can be used with or without a hemodialysis machine. After the patient has been made comfortable, two catheters are placed in the arm, one in an artery and one in a nearby vein
What type of scheduling is there in RTOS?
A scheduler is the heart of every RTOS. It provides the algorithms to select the task for execution. Three common scheduling algorithms are
> Cooperative scheduling
> Round-robin scheduling
> Preemptive scheduling
RTOS uses preemptive (priority based) scheduling.
In some cases, real-time requirements can be met by using static scheduling.
Describe the functions and layers of an operating system?
The operating system is the core software component of your computer. It performs many functions and is, in very basic terms, an interface between your computer and the outside world. The operating system provides an interface to various parts(eg. Mouse,monitor,printer,keyboard etc.) using what is referred to as "drivers". This is why sometimes when you install a new printer or other piece of hardware, your system will ask you to install more software called a driver.
The operating system provides for several other functions including:
- System tools (programs) used to monitor computer performance, debug problems, or maintain parts of the system.
- A set of libraries or functions which programs may use to perform specific tasks especially relating to interfacing with computer system components.
The operating system makes these interfacing functions along with its other functions operate smoothly and these functions are mostly transparent to the user
Operating system performs following basic function:
1.contolling and allocating memory.
2.pritizing system request
3.controlling input and output decices
Define time sharing operating system?
Time sharing system allows many users to share the computer simultaneously. It is used when several users are linked through communication networks to a single computer.
The computer is unable to find a system folder to boot from. You will need to install Mac OS X again from the installation discs that came with the computer. Insert the disc and hold down the C key while the computer restarts to boot from the disc. Follow the instructions to reinstall Mac OS X. Do not delete (or even move) files unless you are certain that they are not required.
When is it important to get an update for an application or operating system?
i think....
i dont get it...totally man...it screwed up my brain...
How would you describe application software?
A software which helps to run a application is called a application software.
eg. Microsoft Office
What are the required levels of integrity and availability for a MAC I system?
A high level of integrity and a high level of availability
What is meaning of open source operating sysytem?
Recursive program/function/... is something that executes/invokes itself.
For example rm -rf will delete everything in a directory, also invoking "rm -rf" on every folder in this directory.
What is a floating-point operation?
The speed of floating-point operations is an important measure of performance for computers in many application domains. It is measured in "megaFLOPS http://en.wikipedia.org/wiki/Floating_point
List four reasons for process suspension?
- swapping
- interactive user request
- timing
- parent process request
Which technique is an example of operating system hardening?
Type your answer here... Enable IP filtering
Answer Explanation: To ensure operating system hardening, you should enable IP filtering within the operating system whenever possible. This restricts the type of services that users can connect to, regardless of the computer's logical position within the network.
What is Runtime memory mapping?
Runtime memory mapping pertains to any given geographical?æinformation that is not officially stored memory. It is quite similar to real time in that it is the here and now status. Often times it is fed from satellite.?æ
Fdisk/status
What is the relationship between operating system GUI and application software?
An analogy would describe it: CAR, Car DRIVER & DESTINATION.
CAR being the COMPUTER itself is driven by the Car DRIVER (Operating System) to the DESTINATION(Desired Output of Application Software).
How structure and function of computer are different.explain with example?
Structure means how different elements of computer are interlinked, how they are interrelated. While organization referes to operation of different elements of computers in a particular structure
What is reactive maintenance in operating system?
reactive maintenance is a repair carried out when equipment fails.
Does every program have access to all hardware?
No, most programs have no access at all to hardware. They call device drivers through the OS to perform input and output. These device drivers are custom written to access the hardware for the device they control.
Modern computers use privileged instructions that cause an error if a user program tries to execute them to access hardware. The device drivers have the privilege to execute these instructions and access hardware.
What is the differnce between proprietary operating systems and nonproprietary operating systems?
"Proprietary" means that the source is closed or only available to a select few. Microsoft Windows is an excellent example of a proprietary operating system.
"Non-proprietary" is the opposite of the above. These are more commonly referred to as "free" operating systems, since you have access to the underlying code, and can modify it. Linux and FreeBSD are excellent examples of non-proprietary operating systems.
Determine priorities in scheduling your time?
Many people schedule their time by working on their top priorities first. When determining what those priorities should be, you can choose ones that have deadlines that are quickly approaching. Or, you may choose to focus on major events such as a wedding, party, life event, etc.
