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Circle the correct answer. I An operating system structure that has removed all non-essential componen's from the kernel is known as: ii) monolithic b) layered c) microkernel d) hybrid 2) An interface which allows direct command enryy from users is called: a) Command Line Interface b) POSIX interface c) Graphical User Interface d) bateh interface 3) A single-core, single-processor system that rapidly switches between processes is.: a) parallel b) concurrent c) single-tasking d) batch 4) Os hardware distinguishes kernel processes from user processes thanks to: a) Dual-mode operations b) User-mode operations c) Kemel-mode operations d) none 5) Which of the following is a preemptive scheduling algorithm? a) Shortest Job First b) First Come First Served c) Round Robin d) all 6) The concept where all thread are doing the same operation, but on differemt pleces of data is known as: a) Task parallelism b) Thread parallelism c) Context switching d) Data parallelism