WorksheetsUnderstanding Operating Systems
Total questions: 10
Worksheet time: 5mins
What is a system call in an operating system?
A system call is a command for users to execute programs directly.
A system call is an interface for user applications to request services from the operating system.
A system call is a protocol for network communication between applications.
A system call is a method for the operating system to manage hardware resources.
List the types of system calls commonly used.
Input validation, session management, logging, and configuration management
File management, process control, communication, and device management
Memory allocation, network control, user management, and error handling
Data processing, thread synchronization, security management, and resource allocation
How does a system call differ from a regular function call?
A system call is a type of loop in programming.
A system call is faster than a regular function call.
A system call is only used for error handling.
A system call interacts with the operating system, while a regular function call operates within the application.
What role do system calls play in process management?
System calls are only relevant for network communication.
System calls are used exclusively for file management tasks.
System calls facilitate process management by allowing processes to interact with the operating system for resource allocation and control.
System calls prevent processes from accessing system resources.
Explain the concept of multiprogramming in relation to system calls.
Multiprogramming is a method that only allows background processes to run without system calls.
Multiprogramming limits processes to one at a time, avoiding system calls for efficiency.
Multiprogramming allows multiple processes to run concurrently, using system calls to manage I/O and resource requests efficiently.
Multiprogramming requires all processes to complete before any I/O operations can occur.
What is the purpose of the 'open' system call?
To open a file and obtain a file descriptor for reading or writing.
To read the contents of a file without opening it.
To create a new directory in the filesystem.
To delete a file from the filesystem.
Describe how system calls facilitate multitasking.
System calls enable multitasking by allowing processes to request OS services, facilitating scheduling and context switching.
System calls eliminate multitasking by forcing processes to run sequentially without interruption.
System calls simplify multitasking by merging processes into a single thread for efficiency.
System calls hinder multitasking by blocking process requests and limiting resource access.
What are the security implications of system calls?
System calls are only used for data processing tasks.
System calls enhance security by limiting access to resources.
System calls do not interact with user input or external systems.
System calls can lead to security risks like privilege escalation, exploitation of vulnerabilities, and improper input validation.
How do system calls interact with hardware resources?
User applications manage hardware resources independently of system calls.
System calls enable user applications to request and manage hardware resources through the operating system.
System calls directly control hardware without OS involvement.
System calls are only used for memory management in applications.
Give an example of a system call used for file manipulation.
open
read
delete
write
