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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?

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

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

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

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

Access memory regions (A) Signup and view all the answers

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

Control access to resources (D) Signup and view all the answers

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

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

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

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

Which programming languages are currently used to code system programs?

C, C++, and Java (B) Signup and view all the answers

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

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

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

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