UNIT 1

2. The type of operating system that allows multiple users to use the computer simultaneously.(BTL 2)
6. The model where multiple user-level threads are mapped to a single kernel thread.(BTL 2)
7. The system call interface defines this to standardize communication between programs and OS.(BTL 4)
11. The process of switching CPU between different threads.(BTL 3)
12. The user interface commonly used in Linux systems to type commands.(BTL 1)

1. The problem that occurs when multiple threads access shared data simultaneously without synchronization.(BTL 4)
3. The multithreading model that multiplexes many user threads to a smaller or equal number of kernel threads.(BTL 3)
4. The function used to create a new process in Linux system calls.(BTL 2)
5. The system call that reads data from a file descriptor.(BTL 3)
8. The small, fast memory located inside the CPU used to hold temporary data.(BTL 3)
9. An example of a popular open-source operating system.(BTL 1)
10. The layer that acts as an interface between user programs and the hardware in an OS.(BTL 2)