Q&A 

Which of the functionalities listed below need to be supported by the operating system for the real time systems?

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Which of the functionalities listed below need to be supported by the operating system for the real time systems?

Answer: For real-time systems, the operating system needs to support virtualmemory and time sharing in a fair manner.

Which operating systems are typically used on handheld devices?

The most well-known mobile OSs are Android, iOS, Windows phone OS, and Symbian. The market share ratios of those OSs are Android 47.51%, iOS 41.97%, Symbian 3.31%, and Windows phone OS 2.57%. There are some other mobile OSs that are less used (BlackBerry, Samsung, etc.) [46].

What are the three main purposes of an operating system?

An operating system has three main functions: (1) manage the computer’s resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.

What is time sharing operating system with example?

A time sharing system allows many users to share the computer resources simultaneously. In other words, time sharing refers to the allocation of computer resources in time slots to several programs simultaneously. For example a mainframe computer that has many users logged on to it.

What is difference between symmetric and asymmetric multiprocessing?

The main difference between symmetric and asymmetric multiprocessing is that, in symmetric multiprocessing, the CPUs are identical and they share the main memory while, in asymmetric multiprocessing, the CPUs are not identical and they follow slave-master relationship.

What are the three general methods used to pass parameters to the operating system?

There are three main methods to pass the parameters required for a system call: (1) Pass the parameters in registers (this may prove insufficient when there are more parameters than registers). (2) Store the parameters in a block, or table, in memory, and pass the address of block as a parameter in a register.

What is a handheld operating system?

A handheld computer is a computer that can conveniently be stored in a pocket (of sufficient size) and used while you’re holding it. Today’s handheld computers, which are also called personal digital assistants (PDAs), can be divided into those that accept handwriting as input and those with small keyboards.

What is handheld computer OS?

The operating systems used for handheld computers differ from those used with a typical computer. Popular early handheld operating systems include Palm OS, Microsoft Windows CE, and other custom Linux-based operating systems.

What is the function of time-sharing operating system?

Time sharing OS allows the user to perform more than one task at a time, each task getting the same amount of time to execute. Hence, the name time sharing OS. Multiple jobs are running at the CPU time and also, they use the CPU simultaneously.

What are the four functions of operating system?

In any computer, the operating system:

  • Controls the backing store and peripherals such as scanners and printers.
  • Deals with the transfer of programs in and out of memory.
  • Organises the use of memory between programs.
  • Organises processing time between programs and users.
  • Maintains security and access rights of users.