Which of the following operating systems supports only real-time applications?

An operating system provides a platform on which other applications programs can be installed. It also provides the environment within which programs are executed. It can be termed as a program or system software that acts as an intermediary between user and hardware.

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Functions of Operating System
Types of Operating Systems
Batch Operating System
Multiprogramming Operating System
Multitasking Operating System
Real-Time Operating System
Which of the following is an real
What are the applications of real
Which OS is best for real
What are three examples of real

Resource Manager/Allocator - It manages the system resources in an unbiased fashion in both hardware(mainly CPU time, memory, system buses) and software(access, authorization, semaphores) and provides the functionality to application programs.

Operating System controls and coordinates the use of resources among various application programs.

Computer Hardware - CPU, Memory units, I/O devices, system bus, registers, etc, provides the basic computing resources.

System and Application Programs - Defines the way in which these resources are used to solve the computing problems of the user.

Functions of Operating System

Process Management
Memory Management
I/O device management
File Management
Network Management
Security and Protection

Types of Operating Systems

Batch Operating System

To speed up the processing job with similar types, the tasks are batched together and were run through the processor as a group batch.
In some operating systems, grouping is done by the operator while in some systems, it is performed by the Batch Monitor resisted in the low end of the main memory.
The jobs are bundled into batches with similar requirements.
Then the submitted jobs were grouped as FORTRAN jobs, COBOL jobs, etc.

Multiprogramming Operating System

A single program cannot, in general, keep either the CPU or the I/O devices busy all times. The basic idea of a multiprogramming operating system is it keeps several jobs in the main memory simultaneously.
The OS picks and begins to execute one of the jobs in memory. Eventually, the jobs may have to wait for some task, such as an I/O operation, to complete.

Multitasking Operating System

In the modern OS, we are able to play MP3 music, edit documents, surf the web all running at the same time.
For multitasking to take place, firstly there should be multiprogramming i.e. presence of multiple programs for execution. And secondly the concept of time-sharing.

Real-Time Operating System

A real-time system is a time-bound system that has well-defined fixed time constraints. Processing must be done within the defined constraints or the system will fail.
RTOS is intended to serve real-time applications that process data as it comes in, typically without buffer delays. It is used in an environment where a large number of events must be accepted and processed in a short time.

Resources

Practice Coding
OS Interview Questions
Features of Operating System
Components of Operating System

Priority scheduling

Round Robin

Shortest Job First

All of the above

Provides a layer so as to act as a user-friendly interface that enables the programmer to draw a flow chart

Links the program with subroutines

Helps to create a flow chart of the programs

All of these

Demand paging

Paging

Threads

Segmentation

Pre-emptive scheduling

Non-pre-emptive scheduling.

Deadline scheduling

None of the above

Quick sharing OS

Time Sharing OS

Real time OS

Batch OS

Synchronization

Deadlock

Starvation

Context Switching

Light weight process

Heavy weight process

Multi-process

I/0 process

Mainframe and motherboard level

Kernel and User level

Security and Memory level

OS and CPU level

FCFS

SJF

Priority scheduling

None

Virtual mode, dedicated mode

Private mode, public mode

Real mode, protected mode

Direct mode, indirect mode

Virtual memory

Operating system

CPU

Input

When the process is scheduled to run after some execution

When the process is currently using the CPU

When the process is dependent of the execution time of some other process.

None of these

A line printer that prints the output of a number of jobs.

A terminal that inputs user data

A I/O device to display graphics.

None

Non-volatile

Volatile

Restricted

Unrestricted

Preventing deadlock

Solving deadlock

Recover from deadlock

None

Main memory

Disk

Cache

when the thread terminates

when the thread blocks

when the thread unblocks

when the thread spawns

stack

program counter

both program counter and stack

none

to construct a new thread

to communicate between threads

convert a blocking system call into non blocking system call

None

an application having several threads of activity all within the same address space.

share the memory and resources of the process to which the threads belong

Compress the address space a process can use

all of the mentioned

When the program needs to be multi-threaded

When there is a single processor present

When the program does not need multithreading

None

infinite process

orphan process

zombie process

none

code code code code

code code code

code code

code

The process of terminating a thread process before its execution

The process of removing a thread after its work is executed

The process of destroying the thread after its work is executed

none

Immediate Termination

Asynchronous termination

Synchronous termination

Deferred cancellation

sent together

queued

stacked

none

True

False

Both, depends on the data

None

prompt

kernel

command

shell

Spooling is a type of fast memory

Spooling holds a single copy of data

Spooling holds copy of all data in the system

none

dispatch

wakeup

block

none

CPU & I/O Burst

I/O & OS Burst

Memory & I/O Burst

CPU and Memory burst

decrease CPU utilisation

decrease cost

increase CPU utilisation

None

Shortest Job First

First Come First Serve

Round robin

None

single

static

atomic

none of the mentioned

atomic, critical section

integer variable, memory error

integer variable, critical section

atomic, memory error

wait, signal

wait, stop

signal, stop

signal, wait

Counting and decimal semaphore

Counting and binary semaphore

Counting and mutex

None

system calls

I/O interrupts

command lines

None

Not deadlocks

Deadlocks

Livelock

None

Load time

Compile time

Execution time

All of the above

Relocation register

Regular register

Delocation register

Basic register

System Calls

API

Library

Assembly Instructions

CPU

Address Bus

RAM

Data Bus

Process Control

MS DOS

WIndows XP

Lynx

Which of the following is an real

Three types of RTOS are 1) Hard time 2) Soft time ,and 3) Firm time.

What are the applications of real

RTOSes are designed to handle multiple processes at one time, ensuring that these processes respond to events within a predictable time limit. Processing in an RTOS occurs within defined time constraints and monitors the priority of tasks. An RTOS is also able to make changes to task priority.

Which OS is best for real

Azure RTOS Azure real-time operating system is an embedded development suite that contains a small but effective OS that delivers consistent, ultra-fast performance for resource-constrained devices. It is simple to use and market-proven. Azure RTOS supports the most common 32-bit microcontrollers.