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Job queue - This queue keeps all the processes in the system.
Ready queue - This queue keeps a set of all processes residing in main memory, ready and waiting to execute. A new process is always put in this queue.
Device queues - The processes which are blocked due to unavailability of an I/O device constitute this queue.
chegedict answered the question on March 30, 2020 at 07:34
- Briefly describe process control blocks(Solved)
Briefly describe process control blocks
Date posted: March 30, 2020. Answers (1)
- Briefly explain the four division of a process(Solved)
When a program is loaded into the memory and it becomes a process, it can be divided into four sections - stack, heap, text and data.
Date posted: March 30, 2020. Answers (1)
- What are the activities of operating systems related to real time system?(Solved)
What are the activities of operating systems related to real time system?
Date posted: March 24, 2020. Answers (1)
- Highlight activities of operating sytems with regard to interactivity(Solved)
Interactivity refers to the ability of users to interact with a computer system. An Operating system does the following activities related to interactivity -
Provides the user an interface to interact with the system.
Manages input devices to take inputs from the user. For example, keyboard.
Manages output devices to show outputs to the user. For example, Monitor.
Date posted: March 24, 2020. Answers (1)
- Highlight two advantages and two disadvantages of multiprogramming(Solved)
Advantages
High and efficient CPU utilization.
User feels that many programs are allotted CPU almost simultaneously.
Disadvantages
CPU scheduling is required.
To accommodate many jobs in memory, memory management is required.
Date posted: March 24, 2020. Answers (1)
- Basing on multitasking operating systems highlight six major activities of operating system involved(Solved)
Basing on multitasking operating systems highlight six major activities of operating system involved.
Date posted: March 23, 2020. Answers (1)
- What are the activities of operating systems with relation to batch processing?(Solved)
What are the activities of operating systems with relation to batch processing?
Date posted: March 23, 2020. Answers (1)
- What are the advantages of distributed operating systems?(Solved)
The advantages of distributed systems are as follows -
With resource sharing facility, a user at one site may be able to use the resources available at another.
Speedup the exchange of data with one another via electronic mail.
If one site fails in a distributed system, the remaining sites can potentially continue operating.
Better service to the customers.
Reduction of the load on the host computer.
Reduction of delays in data processing.
Date posted: March 21, 2020. Answers (1)
- Briefly describe distributed operating systems.(Solved)
Distributed systems use multiple central processors to serve multiple real-time applications and multiple users. Data processing jobs are distributed among the processors accordingly.
The processors communicate with one another through various communication lines (such as high-speed buses or telephone lines). These are referred as loosely coupled systems or distributed systems. Processors in a distributed system may vary in size and function. These processors are referred as sites, nodes, computers, and so on.
The advantages of distributed systems are as follows -
With resource sharing facility, a user at one site may be able to use the resources available at another.
Speedup the exchange of data with one another via electronic mail.
If one site fails in a distributed system, the remaining sites can potentially continue operating.
Better service to the customers.
Reduction of the load on the host computer.
Reduction of delays in data processing.
Date posted: March 21, 2020. Answers (1)
- Highlight three disadvantages of time sharing operating systems(Solved)
Time-sharing is a technique which enables many people, located at various terminals, to use a particular computer system at the same time. Time-sharing or multitasking is a logical extension of multiprogramming. Processor's time which is shared among multiple users simultaneously is termed as time-sharing.
The main difference between Multiprogrammed Batch Systems and Time-Sharing Systems is that in case of Multiprogrammed batch systems, the objective is to maximize processor use, whereas in Time-Sharing Systems, the objective is to minimize response time.
Disadvantages of Time-sharing operating systems are as follows -
Problem of reliability.
Question of security and integrity of user programs and data.
Problem of data communication.
Date posted: March 21, 2020. Answers (1)
- Describe time sharing operating systems.(Solved)
Time-sharing is a technique which enables many people, located at various terminals, to use a particular computer system at the same time. Time-sharing or multitasking is a logical extension of multiprogramming. Processor's time which is shared among multiple users simultaneously is termed as time-sharing.
Date posted: March 21, 2020. Answers (1)
- What are the problems associated with batch operating systems?(Solved)
The users of a batch operating system do not interact with the computer directly. Each user prepares his job on an off-line device like punch cards and submits it to the computer operator. To speed up processing, jobs with similar needs are batched together and run as a group. The programmers leave their programs with the operator and the operator then sorts the programs with similar requirements into batches.
The problems with Batch Systems are as follows -
Lack of interaction between the user and the job.
CPU is often idle, because the speed of the mechanical I/O devices is slower than the CPU.
Difficult to provide the desired priority
Date posted: March 21, 2020. Answers (1)
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Explain batch operating systems.
Date posted: March 21, 2020. Answers (1)
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What are the activities of the operating systems with regard to file management?
Date posted: March 21, 2020. Answers (1)
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What are the activities of the operating systems with regard to device management?
Date posted: March 21, 2020. Answers (1)
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What are the activities of the operating systems with regard to processor management?
Date posted: March 21, 2020. Answers (1)
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List and explain 4 applications of an operating systems.
Date posted: March 21, 2020. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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State two types of computer output devices.
Date posted: June 25, 2019. Answers (1)