An operating system that guarantees a response within a strictly fixed time limit, as needed in missile control and medical equipment, is called
- A.Batch operating system
- B.Real time operating system
- C.Time sharing operating system
- D.Distributed operating system
Correct answer
Explanation
The correct answer is B, real time operating system. A real time system is judged not only by whether it gives the right answer but by whether it gives that answer inside a fixed deadline. Missile guidance, aircraft control, robotics, industrial plants and life support equipment all use such systems, where a late response is treated as a failed response.
Option A, a batch operating system, collects similar jobs and runs them one after another without any user interaction, so response time is unimportant. Option C, a time sharing system, divides processor time among many users to give each a quick turn, but it offers no hard guarantee for a particular deadline. Option D, a distributed operating system, spreads work across several connected computers so that they appear as one machine; its aim is resource sharing and reliability, not a guaranteed deadline.
Read the full article: Software and Operating Systems: Types, Functions and MCQs
Practice Questions
View allWhich of the following is the core part of an operating system that always remains in main memory?
- A.Shell
- B.Kernel
- C.Compiler
- D.Loader
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The kernel is the central part of the operating system and is the portion that is loaded at boot time and stays resident in main memory for as long as the computer is running.
Read the full explanation →Which type of software is permanently stored on a chip and is required before any other program can run?
- A.Application software
- B.Utility software
- C.Firmware
- D.Freeware
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Firmware is software written permanently into a read only memory chip at the time of manufacture.
Read the full explanation →Which scheduling algorithm allots a fixed time slice to every process in rotation and is therefore used in time sharing systems?
- A.First Come First Served
- B.Shortest Job First
- C.Round Robin
- D.Priority scheduling
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In Round Robin scheduling every ready process is given the processor for a fixed period called the time quantum, and when that period expires the process is moved to the back of the queue and the next one is served.
Read the full explanation →UNIX operating system was developed in 1969 at which organisation?
- A.Bell Laboratories
- B.IBM
- C.Microsoft
- D.Apple
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UNIX was developed in 1969 at Bell Laboratories by Ken Thompson and Dennis Ritchie, and it became the model for almost every multi user operating system that followed.
Read the full explanation →The situation in which two processes each hold a resource the other needs and neither can proceed is called
- A.Thrashing
- B.Deadlock
- C.Spooling
- D.Fragmentation
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Deadlock is the state in which every process in a set is waiting for a resource that another process in the same set is holding, so none of them can ever move forward without the operating system stepping in.
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