System Calls Video Lecture | Operating System - Computer Science Engineering (CSE)

10 videos|99 docs|33 tests

FAQs on System Calls Video Lecture - Operating System - Computer Science Engineering (CSE)

1. What is a system call in computer science?
Ans. A system call is a request made by an active process for a service performed by the operating system on its behalf, such as reading or writing data, creating a new process, or requesting input/output operations.
2. How are system calls used in CSE?
Ans. In computer science engineering, system calls are used to interact with the operating system and access its services to perform tasks such as file operations, process management, memory allocation, and network communication.
3. What are some common examples of system calls?
Ans. Some common examples of system calls include open(), read(), write(), fork(), exec(), wait(), and close(). These system calls are used for tasks like opening files, reading data, creating new processes, and managing processes.
4. How are system calls different from regular function calls?
Ans. System calls differ from regular function calls in that they involve a switch from user mode to kernel mode in the operating system, where privileged operations can be performed. Regular function calls stay within the user mode of a program.
5. Can system calls be directly accessed by a programmer in CSE?
Ans. In CSE, system calls are typically accessed through high-level programming languages such as C or C++ using wrapper functions provided by the operating system's API. Directly accessing system calls is possible but often discouraged due to potential security risks and compatibility issues.
10 videos|99 docs|33 tests
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