System Calls Quiz

What is a system call?

• A request in a Unix-like operating system made via a software interrupt by an active process for a service performed by the kernel.

• A type of phone call made within a computer system

• A type of error message displayed by the kernel

• A method for scheduling tasks in an operating system

Name three common system calls in Unix/Linux.

• start(), stop(), pause()

• open(), read(), write()

• run(), jump(), skip()

• input(), output(), delete()

Explain the difference between a library function and a system call.

• A library function is used for creating new functions within a program, while a system call is used for terminating a program.

• A library function is used for making calls to other programs, while a system call is used for accessing files within the same program.

• A library function is only available in Windows operating systems, while a system call is only available in Unix-based operating systems.

• A library function is a set of pre-written code that can be reused in a program, while a system call is a request for a service made by a program to the operating system.

What are the three basic types of system calls?

• Process control, file management, and device management

• Memory allocation, network management, and input/output handling

• User interface, database management, and software development

• Error handling, security management, and data processing

What is the purpose of a system call interface?

• To provide direct access to hardware without going through the operating system

• To slow down the performance of the operating system

• To prevent user-level processes from accessing the operating system

• To allow user-level processes to request services from the operating system.

How does a system call differ from a regular function call?

• A system call is only used in embedded systems

• A system call involves a request for a service from the operating system.

• A system call is only used for hardware communication

• A system call does not involve the operating system

Explain the role of the operating system in handling system calls.

• The operating system manages system calls and provides an interface for applications to request services from the kernel.

• System calls are only handled by the application itself

• System calls are managed directly by the hardware

• The operating system has no role in handling system calls

What are the steps involved in making a system call?

• Writing a letter to the system

• Singing a song to the computer

• Preparing parameters, triggering system call instruction, switching to kernel mode, executing requested operation, returning to user mode

• Sending a text message to the operating system

Discuss the concept of system call parameters.

• Values passed to a system call to specify the file path

• Values passed to a system call to specify the operation to be performed by the kernel

• Values returned by a system call to the user program

• Values passed to a system call to specify the user's credentials

What are the potential risks associated with system calls?

• Increased efficiency, improved security, and better performance

• Decreased productivity, enhanced security, and stability

• Enhanced functionality, improved reliability, and better user experience

• Security vulnerabilities, system crashes, and performance issues