Medialink wireless n3/10/2023 What is a deadlock? Different conditions to achieve a deadlock.Ī Deadlock is a situation where each of the computer processes waits for a resource which is being assigned to some other process. This means, in case of disk failure, if the same data is also backed up onto another disk, we can retrieve the data and go on with the operation. RAID, or “Redundant Arrays of Independent Disks” is a technique which makes use of a combination of multiple disks instead of using a single disk for increased performance, data redundancy or both.Data redundancy, although taking up extra space, adds to disk reliability. High degree of multiprogramming(if number of processes keeps on increasing in the memory), lack of frames (if a process is allocated too few frames, then there will be too many and too frequent page faults) causes Thrashing.Ī thread is a single sequential flow of execution of tasks of a process so it is also known as thread of execution or thread of control. Thrashing is a condition or a situation when the system is spending a major portion of its time in servicing the page faults, but the actual processing done is very negligible. Second, it allows us to have memory protection, because each virtual address is translated to a physical address. First, it allows us to extend the use of physical memory by using a disk. The main visible advantage of this scheme is that programs can be larger than physical memory. This extra memory is actually called virtual memory and it is a section of a hard disk that’s set up to emulate the computer’s RAM. Define virtual memory, thrashing, threads.Ī computer can address more memory than the amount physically installed on the system. For example,Word processor uses multiple threads: one thread to format the text, another thread to process inputs. The idea is to achieve parallelism by dividing a process into multiple threads. A thread is also known as a lightweight process. Thread is a path of execution within a process. Program is a set of instructions to perform a certain task. For example, we write our computer programs in a text file and when we execute this program, it becomes a process which performs all the tasks mentioned in the program. Process is an instance of an executing program. Difference between process and program and thread? Different types of process. It has huge lines of code which is complex.Įxample : Unix, Linux, Open VMS, XTS-400 etc. It has dependencies between system components. It is one of the types of kernel where all operating system services operate in kernel space. Monolithic Kernel (provides good performance but lots of lines of code) Kernel Establishes communication between user level application and hardware. Kernel is the central core component of an operating system that manages operations of computer and hardware. Once a request is received, the server accepts a connection from the client socket to complete the connection. The server waits for incoming client requests by listening to a specified port. A socket is identified by an IP address concatenated with a port number. Reference: What is a socket, kernel and monolithic kernel ?Ī socket is defined as an endpoint for communication, A pair of processes communicating over a network employ a pair of sockets ,one for each process. Without an operating system, a computer is not useful. It also allows us to communicate with the computer without knowing how to speak the computer’s language. So it manages the computer’s memory, processes, devices, files, and security aspects of the system. Major success with the previous sheets, and more importantly trusted by his “TAKEUFORWARD FAM” Question Bank Starts Operating System: What is the main purpose of an operating system? Discuss different types?Īn operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. This sheet is prepared by Raj Vikramaditya A.K.A Striver, Candidate Master, 6*, Currently working at Google, ex (Directi), an ex Intern at Amazon India. 100+ students placed already with the help of the SDE Core Sheet! Why trust this sheet? These questions are very helpful for the last-minute preparation for SDE interviews. SDE Core Sheet contains very handily crafted and picked interview questions of DBMS, OS, and CN. Made with love by takeUforward! What is the SDE Core Sheet? (Sheet for the sole purpose of quick revision and preparation in less time)
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