Describe I/O Burst and CPU Burst cycle with neat diagram.

Describe I/O Burst and CPU Burst cycle with neat diagram.
by

1 Answer

Answer :

CPU burst cycle: It is a time period when process is busy with CPU. 

I/O burst cycle: It is a time period when process is busy in working with I/O resources.

A process execution consists of a cycle of CPU execution and I/O wait.

A process starts its execution when CPU is assigned to it, so process execution begins with a CPU burst cycle.

This is followed by an I/O burst cycle when a process is busy doing I/O operations.

A process switch frequently from CPU burst cycle to I/O burst cycle and vice versa.

The complete execution of a process starts with CPU burst cycle, followed by I/O burst cycle, then followed by another CPU burst cycle, then followed by another I/O burst cycle and so on.

The final CPU burst cycle ends with a system request to terminate execution.

image

by

Related questions

With neat diagram explain inter process communication model.

Description : With neat diagram explain inter process communication model.

Last Answer : Inter-process communication: Cooperating processes require an Interprocess communication (IPC) mechanism that will allow them to exchange data and information. There are two models of IPC 1. ... a communication link between them. Between each pair of processes exactly one communication link.

Explain PCB with diagram.

Description : Explain PCB with diagram.

Last Answer : Each process is represented as a process control block (PCB) in the operating system. It contains information associated with specific process. Process State: It indicates current state of a process. ... . Each PCB gives information about a particular process for which it is designed.

Draw process state diagram.

Description : Draw process state diagram.

Last Answer : process state diagram

List free space management techniques? Describe any one in detail.

Description : List free space management techniques? Describe any one in detail.

Last Answer : A file system is responsible to allocate the free blocks to the file therefore it has to keep track of all the free blocks present in the disk. There are mainly four approaches by using which, the free ... block. This block contains a pointer to the next free disk block, and so on.

State and describe types of scheduler.

Description : State and describe types of scheduler.

Last Answer : There are three types of scheduler: Long term scheduler Short term scheduler Medium term scheduler 1. Long term scheduler: It selects programs from job pool and loads them into the ... scheduler works in close communication with long term scheduler for loading process into the main memory. 

Describe sequential and direct access method.

Description : Describe sequential and direct access method.

Last Answer : Sequential access: Information from the file is processed in order i.e. one record after another. It is commonly used access mode. For example, editors and compilers access files in sequence. A read ... prevent the user from accessing portions of the file system that may not be part of his file.

Describe any four file attributes

Description : Describe any four file attributes

Last Answer : File attributes: Name: The symbolic file name is the only information kept in human readable form. Identifier: File system gives a unique tag or number that identifies file within file ... Last modification and last use. These data can be useful for protection, security and usage monitoring.

List any four features of open source operating system.

Description : List any four features of open source operating system.

Last Answer : 1. Open Source: open source OS code is freely available and it is community based development project. Multiple team's works in collaboration to enhance the capability of operating system and it is ... issuing a command in Linux Terminal or Shell. Linux can also run Windows applications if needed.

Enlist different file allocation methods? Explain contiguous allocation method in detail.

Description : Enlist different file allocation methods? Explain contiguous allocation method in detail.

Last Answer : From the user's point of view, a file is an abstract data type. It can be created, opened, written, read, closed and deleted without any real concern for its implementation. The implementation of a ... a times is difficult to estimate. 4. Compaction may be required and it can be very expensive.

Explain LRU page replacement algorithm for following reference string. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Calculate the page fault.

Description : Explain LRU page replacement algorithm for following reference string. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Calculate the page fault.

Last Answer : LRU: The Least Recently Used (LRU) page replacement policy replaces the page that has not been used for the longest period of time. LRU replacement associates with each page the time of that page's last use. ... in question so assume frame size as 3 or 4) LRU: Assume frame size=3

Explain multithreading model in detail.

Description : Explain multithreading model in detail.

Last Answer : Many systems provide support for both user and kernel threads, resulting in different multithreading models. Following are three multithreading model: Many-to-One Model The many-to- ... True concurrency cannot be achieved. Multiple threads of kernel is an overhead for operating system

Enlist the operating system tools. Explain any two in detail.

Description : Enlist the operating system tools. Explain any two in detail.

Last Answer : Following are the operating tools: User Management Security policy Device Management Performance Monitor Task Scheduler A) User management: User management includes everything ... routing tables, interface statistics, masquerade connections, and multicast memberships. # netstat -tulpn

Explain Round Robin algorithm with suitable example.

Description : Explain Round Robin algorithm with suitable example.

Last Answer : It is preemptive scheduling algorithm. A small unit of time known as a time quantum or time slice is used for pre-emption of a currently running process. Ready queue is implemented as a circular ... has received 1 time quantum, the CPU returns to process P1 for an additional time quantum. 

What is purpose of system call? State two system calls with their functions.

Description : What is purpose of system call? State two system calls with their functions.

Last Answer : System call provides an interface between a running program and operating system. It allows user to access services provided by operating system. This system calls are procedures written using C, ... send, receive messages transfer status information attach or detach remote devices. 

Write Unix command for following: i)create a folder OSY ii) create a file FIRST in OSY folder iii) List/display all files and directories. iv) Write command to clear the screen

Description : Write Unix command for following: i)create a folder OSY ii) create a file FIRST in OSY folder iii) List/display all files and directories. iv) Write command to clear the screen

Last Answer : i) create a folder OSY: $mkdir OSY ii)create a file FIRST in OSY folder: $cd OSY $cat>FIRST or $ touch FIRST iii) List/display all files and directories: $ls iv) to clear screen: $clear

Explain partitioning and its types.

Description : Explain partitioning and its types.

Last Answer : An important operation of memory management is to bring programs into main memory for execution by the processor. Partitioning is a technique that divides a memory into multiple partitions. These partitions ... in memory. For example: Consider following table with process and memory space.

Explain deadlock? What are necessary conditions for deadlock?

Description : Explain deadlock? What are necessary conditions for deadlock?

Last Answer : In multiprogramming environment, several processes may compete for a finite number of resources. A process requests resources and if the resources are not available then the process enters into the ... Each process is waiting for the resources held by other waiting processes in circular form.

List components of OS. Explain process management in detail.

Description : List components of OS. Explain process management in detail.

Last Answer : List of System Components: 1. Process management 2. Main memory management 3. File management 4. I/O system management 5. Secondary storage management Process Management: The operating ... synchronization. 4. A mechanism for process communication. 5. A mechanism for deadlock handling.

Enlist types of operating system. Explain multiprogramming OS in detail.

Description : Enlist types of operating system. Explain multiprogramming OS in detail.

Last Answer : Types of operating system 1.Batch Systems 2.Multiprogramming 3.Multitasking 4.Time-Sharing Systems 5.Desktop Systems 6.Distributed system 7.Clustered system 8.Real Time system: Multiprogramming ... multiprogramming: user can open word, excel, access and other applications in a system.

Write syntax for following commands: i)Sleep ii)Kill

Description : Write syntax for following commands: i)Sleep ii)Kill

Last Answer : i)sleep Syntax: sleep NUMBER[SUFFIX]… sleep OPTION ii) kill Syntax: kill pid

Define virtual memory

Description : Define virtual memory

Last Answer : Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data ... can be placed in overlays, but can concentrate instead on the problem to be programmed. 

Explain any four scheduling criteria.

Description : Explain any four scheduling criteria.

Last Answer : 1. CPU utilization: In multiprogramming the main objective is to keep CPU as busy as possible. CPU utilization can range from 0 to 100 percent. 2.Throughput: It is the number of processes ... fairly early and can continue computing new results while previous results are being output to the user.

Explain any 4 services provided by OS.

Description : Explain any 4 services provided by OS.

Last Answer : 1.User Interface: All operating systems have a user interface that allows users to communicate with the system. Three types of user interfaces are available: a. Command line interface ( ... to system resources. Security is provided by user authentication such as password for accessing information.

Define real time operating system. List its any four applications of it.

Description : Define real time operating system. List its any four applications of it.

Last Answer : Real time Operating System: A real time system has well defined fixed time constraints. Processing should be done within the defined constraints -Hard and Soft real time system. OR The ... Applications: 1. Flight Control System 2. Simulations 3. Industrial control 4. Military applications

Describe with a neat diagram the working of a simple vapour compression refrigeration system. Represent the cycle on P–V and T–S diagram.

Description : Describe with a neat diagram the working of a simple vapour compression refrigeration system. Represent the cycle on P–V and T–S diagram. 

Last Answer : Vapour compression refrigeration cycle: The vapor-compression uses a circulating liquid refrigerant as the medium which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere. Figure shows ... the compressor. P-V Diagram T-S diagram: 

Describe the construction and working of evaporating pan with neat diagram.

Description : Describe the construction and working of evaporating pan with neat diagram.

Last Answer : Construction:  i. It consists of a hemispherical pan made from copper or stainless steel and surrounded by a steam jacket. ii. Hemispherical shape provides large surface area for evaporation. iii. ... . iv. After evaporation remove the product from product outlet. Diagram:

Describe the structure of ovule with the help of neat labeled diagram

Description : Describe the structure of ovule with the help of neat labeled diagram

Last Answer : Ans: Ovules are seen in flowering plants. In Gymnosperms they are exposed and in angiosperms they are enclosed.   Typical ovule has a stalk known as Funiculus and ovule body. ... as in Monocots and Polypetalae and ategmic without integuments as in parasites such as Balanophora, Loranthus.  

Describe the structure of anther with the help of a neat diagram

Description : Describe the structure of anther with the help of a neat diagram 

Last Answer : Ans: Structure of anther is clearly understood in the transverse section of anther. In the T.S. of a dithecous anther the two thecae are joined by connective consisting of sterile ... later separate from each other and liberated individually. Individual microspores are called as pollen grains. 

Describe working of A.C. voltmeter using half wave rectifier with neat circuit diagram.

Description : Describe working of A.C. voltmeter using half wave rectifier with neat circuit diagram. 

Last Answer : AC Voltmeter using Half Wave Rectifier : The a.c. voltmeter using half wave rectifier is achieved by introducing a diode in a basic d.c. voltmeter. This is shown in the Fig. 1. The diode D ... can be obtained for a.c. voltmeter as, Where Idc is the full scale deflection current..

With the help of neat sketch, describe block diagram of Electronic Diesel Control Unit (EDC).

Description : With the help of neat sketch, describe block diagram of Electronic Diesel Control Unit (EDC).

Last Answer : EDC: The ECU determines the correct quantity of the fuel to be injected based on the inputs and the data in the look up table. The fuel input depends on the rack position and thus ECU ... ECU can also protect the engine against overheating by regulating the maximum quantity of fuel delivered.

Describe working of negative clamper circuit with neat diagram and waveform.

Description : Describe working of negative clamper circuit with neat diagram and waveform.

Last Answer : Working: In the first positive half cycle the capacitor will charge through the forward biased diode to peak voltage Vm as shown in circuit. Charging takes place very quickly as the ... reverse biased and stop conducting. Negative clamper adds a negative DC shift as shown in waveform.

Define cementation. Describe sherardizing with help of neat labeled diagram

Description : Define cementation. Describe sherardizing with help of neat labeled diagram

Last Answer : Cementation: Cementation is the process in which metal coatings are obtained by heating the base metal in a revolving drum containing a powder of the coating metal.   Process: i) The iron articles ... iron forming Fe - Zn alloy at the surface which protects iron surface from corrosion.   

Describe Bessemerization process with neat labeled diagram

Description : Describe Bessemerization process with neat labeled diagram 

Last Answer : After smelting the molten matte is then transferred to a Bessemer converter which is a pear shaped furnace made up of steel and internally lined with lime or magnesia. It is mounted on trunnions and can ... on the surface of copper hence it is called as blister copper. It is 96 to 98% pure

Describe the process of purification of aluminium by electrolytic refining with the help of neat, labelled diagram.

Description : Describe the process of purification of aluminium by electrolytic refining with the help of neat, labelled diagram.

Last Answer : Process: 1) The electrolytic cell consists of an iron tank lined at the bottom with carbon, which serve as anode. A number of graphite rods serve as cathode. 2) The cell is filled with ... . Crude or impure Al is added to the bottom layer from time to time. The process is thus continued.

Describe smelting process with neat labeled diagram.

Description : Describe smelting process with neat labeled diagram.

Last Answer : Roasted copper ore is then mixed with coke & sand particles & then strongly heated at about 13500 C in a water jacketed blast furnace. At high temperature ferrous sulphide (FeS) is oxidised & ... of ferrous sulphide (FeS) is called as matte which is then removed from the lower outlet.

Describe the vector scan display techniques with neat diagram.

Description : Describe the vector scan display techniques with neat diagram.

Last Answer : A pen plotter operates in a similar way and is an example of a randomscan, hard-copy device. When operated as a random-scan display unit, a CRT has the electron beam directed only to the parts ... drawn one line at a time by positioning the beam to fill in the line between specified end points.

Describe the working of directional coupler with neat diagram.

Description : Describe the working of directional coupler with neat diagram. 

Last Answer : Directional couplers are devices that will pass signal across one path while passing a much smaller signal along another path.  One of the most common uses of the directional coupler is to ... . The frequency determines the separation of the two holes as a fraction of the wavelength.  

Describe working of Reflex Klystron amplifier with a neat diagram.

Description : Describe working of Reflex Klystron amplifier with a neat diagram.

Last Answer : Operation: It is assumed that the oscillations are set up in the tube initially due to noise or switching transients and these oscillations are sustained by device operation. ... on the reference electron. These bunch transfer maximum energy to the gap to get sustained oscillations.

Describe the working of an ADM transmitter with neat block diagram.

Description : Describe the working of an ADM transmitter with neat block diagram.

Last Answer : ADM transmitter Block diagram:- OR Working:- A DM system that adjusts its step size according to the information signal characteristics is called as Adaptive Delta ... result is an increase in step size and a reduction in slope-overload distortion as shown in figure

Describe North American (T-carrier) digital multiplexing hierarchy with neat diagram.

Description : Describe North American (T-carrier) digital multiplexing hierarchy with neat diagram.

Last Answer : Explanation:- T1 Carrier System T1 carrier systems were designed to combine PCM and TDM Techniques for the Transmission of 24 64Kbps channels with each channel Capable of Carrying ... 8064 64Kbps voice or data channels and transmit them at 560.16Mbps over a single coaxial cable.

Describe working principle of radiation level measurement with neat diagram.

Description : Describe working principle of radiation level measurement with neat diagram.

Last Answer : Radiation type level measurement. Is non contact type detector which is used where electrical method would not survive. working principle 1.It consist of gamma ray source holder on one side ... 7. Thus, when liquid level rises, the amount of radiation received is reduced and vice versa.

Describe sacrificial anodic protection with neat diagram.

Description : Describe sacrificial anodic protection with neat diagram.

Last Answer : Method: The metallic structure to be protected from corrosion is connected to anodic metal (upper placed in galvanic series) by an insulated wire. Thus externally added metal like Zn, Al, Mg, etc ... hot water tanks to prevent corrosion. The protection of underground pipelines is shown in Fig.

Describe the different modes of fibre optic cable with neat diagram. Compare fibre optic cable with UTP cable.

Description : Describe the different modes of fibre optic cable with neat diagram. Compare fibre optic cable with UTP cable.

Last Answer : STEP-INDEX MULTIMODE FIBER has a large core, up to 100 microns in diameter. As a result, some of the light rays that make up the digital pulse may travel a direct route, whereas others ... optic cables. Fiber is more expensive than copper due to the light emitting equipment and cost.

Describe the function and operation of firewall with neat diagram.

Description : Describe the function and operation of firewall with neat diagram.

Last Answer : A firewall is a part of computer system or network that is designed to block unauthorized access while permitting authorized communications.  2. It is a device or set of devices configured to ... i. Packet filter ii. Proxy server iii. Circuit-level Gateway iv. Application Gateway

Draw neat labelled constructional diagram of INKJET printer. Describe the function of each block. State two advantages.

Description : Draw neat labelled constructional diagram of INKJET printer. Describe the function of each block. State two advantages.

Last Answer : It is a non-impact printer. It provides letter quality printout than dot matrix printer. Its output is sharper than Dot matrix though its output quality is not to the same level of laser printer ... is compatible in quality to that of a laser printer. Faster when compared to Dot Matrix printers.

Describe the construction of SF6 circuit breaker with neat diagram.

Description : Describe the construction of SF6 circuit breaker with neat diagram.

Last Answer : Construction of SF6 Circuit Breaker : A sulphur hexafluoride (SF6) circuit breaker consists of fixed and moving contacts enclosed in a chamber. The chamber is called arc interruption ... contact, moving contact and arcing horn are coated with a copper-tungsten arc-resistant material. 

Describe the construction and Operation of Buchholz relay with neat labeled diagram.

Description : Describe the construction and Operation of Buchholz relay with neat labeled diagram.

Last Answer : Construction of Buchholz Relay: It takes the form of a domed vessel placed in the connecting pipe between the main tank and the conservator. The device has two elements. The upper element ... manner that it senses the sudden violent movement of oil/gas from transformer tank to conservator. 

Describe the working of HRC fuse with neat diagram.

Description : Describe the working of HRC fuse with neat diagram.

Last Answer : Working of HRC Fuse: Under normal conditions, the fuse element is at a temperature below its melting point. Therefore, it carries the normal current without overheating. When a fault ... powder and results in the formation of high resistance substance that helps in quenching the arc. 

Describe with neat circuit diagram the measurement procedure of earth resistance for an installation.

Description : Describe with neat circuit diagram the measurement procedure of earth resistance for an installation. 

Last Answer : Following procedure (Method) for testing of earth pit resistance with necessary diagrams. 1) Earth Tester : i) Three point method ii) Four point method 2) By Potential drop method 3) Water ... of that earthing pit. In this test the accuracy is less but electrical rods are not required.  

Describe the operation of double tuned amplifier with the help of neat circuit diagram and mention its applications.

Description : Describe the operation of double tuned amplifier with the help of neat circuit diagram and mention its applications.

Last Answer : Circuit diagram: Operation:  *The signal to be amplified is applied at the input terminal through the coupling capacitor CC  *The resonant frequency of the tuned circuit L1 C1 is made equal ... : (i) Radio and T .V broadcasting as tuning circuit. (ii) Wireless communication system.