Multiple choice questions on Embedded Operating Systems

A static entity that consists of an address space and ports through which messages may be sent and received is called (A) Domain (B) Clouds (C) Multithreading (D) Multiinstance (E) None of the above Which of the following statement regarding interrupt is incorrect? (A) If no interrupts are pending, the processor proceeds to the next fetch stage. (B) Interrupt usually involves some overhead. (C) In handling multiple interrupts, the processor cannot disable other interrupts while an interrupt is being processed. (D) When the processor transfers control to the interrupt service routine, it needs to save the Program Status Word and the location of next instruction to be executed. (E) None of the above. Which of the following statement regarding memory is incorrect? (A) When the processor attempts to read a byte or word, will first check with the cache memory. (B) The main memory is usually large and slow. (C) The cache size has impacts on performance of the processor. (D) As the cache block size increases, the hit ratio will decrease. (E) None of the above. Which of the following technique is not used for I/O operations? (A) Programmed I/O (B) Interrupt driven I/O (C) Direct Memory Access (D) Peripheral polling I/O (E) None of the above Which of the following defines the system call interface to operating systems and hardware resources? (A) ABI (B) ISA (C) API (D) HLL (E) None of the above If more than one user or program attempts to make use of a shared resource at the same time, may cause the error of (A) improper synchronization (B) failed mutual exclusion (C) nondeterminate program operation (D) deadlock (E) All of the above A collection of one or more threads and associated system resources is called (A) Process (B) Multi-thread (C) Task (D) Job (E) None of the above The error-correction techniques in RAID disks uses the method of (A) spatial redundancy (B) temporal redundancy (C) information redundancy (D) physical redundancy (E) All of the above A copy of an application's state saved in some storage to be immune to the future failure is called (A) process isolation (B) virtual machine (C) checkpoints (D) concurrency control (E) None of the above Which of the following is not supported in Windows operating systems? (A) HAL (B) SMP (C) RPC (D) ALPC (E) None of the above