I/O Techniques and System Calls Quiz

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Questions and Answers

What is the main purpose of system calls in an operating system?

  • To speed up the execution of user programs by bypassing the OS
  • To provide a direct interface for user programs to access OS services (correct)
  • To enable communication between different user processes
  • To allow direct access to hardware components without restrictions

Which kind of programs are capable of making system calls in an operating system?

  • User Programs
  • System Programs (correct)
  • Utility Programs
  • Application Programs

In what language are System Programs typically written?

  • C and C++ (correct)
  • Python
  • Assembly Language
  • Java

How do system calls facilitate user processes' interaction with the operating system?

<p>By providing an interface for user processes to request OS services (C)</p> Signup and view all the answers

What is the purpose of system calls related to 'Information Maintenance'?

<p>Get and set process, file, or device attributes (D)</p> Signup and view all the answers

Which of the following actions is NOT associated with system calls in the 'Communications' category?

<p>Access memory regions (A)</p> Signup and view all the answers

In the context of system calls, what is the purpose of 'Protection' services?

<p>Control access to resources (D)</p> Signup and view all the answers

How do system calls relate to API in terms of invoking functions?

<p>By intercepting function calls and invoking necessary system calls within the OS (B)</p> Signup and view all the answers

What happens when a user's process makes a system call?

<p>The hardware resets the mode-bit to 0 and switches to kernel mode. (A)</p> Signup and view all the answers

Which programming languages are currently used to code system programs?

<p>C, C++, and Java (B)</p> Signup and view all the answers

What is the function of a system program in terms of file processing?

<p>Create, modify, and search the contents of files (A)</p> Signup and view all the answers

How does the operating system handle the state of a user's process after executing a service routine?

<p>Restores the state by loading parameters from the PCB (C)</p> Signup and view all the answers

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