RTOS Question & Answers November 16, 2022 By WatElectronics This article lists 75 RTOS MCQs for engineering students. All the RTOS Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, or interviews, or professionals who would like to brush up on the fundamentals of RTOS. The RTOS is one type of operating system which supports real-time systems. It is categorized into four types they are hard, soft, firm, and non-real-time systems. In non-real-time systems, no deadlines have to be met. The benefits of OS structures are they are easier to debug and scale, distribution over multiple processors is simpler, and possible to dynamically load and unload modules. In contrast, the problems of an OS structure are overhead is high due to memory protection. Process management, inter-process communication, memory Management, and input and output management are the four main tasks of operating systems. The QNX and VxWorks are types of RTOS based on message-passing architecture and based on shared memory architecture. The QNX is a microkernel-based OS and VxWorks is a monolithic kernel-based OS. The QNX uses a priority-based pre-emptive scheduling algorithm for thread allocation and the VxWorks uses a priority-driven pre-emptive and round-robin scheduling algorithm. 1). The operating system structures are categorized into ________________ types? Two Three Four Five None Hint 2). What are the benefits of operating system structure? Easier to debug Easier to scale Both a and b None of the above None Hint 3). The process creation and process loading come under __________________ task of an OS? Process management Inter process communication Memory management Input/output management None Hint Read more about Inter-Process Communication 4). What is the standard form of RMS? RTOS Monotonic Scheduling Rate Monotonic Scheduling Rate Monotonic Shift None of the above None Hint 5). The time needed to execute critical code during which no pre-emption may happen is known as _______________? Interrupt runtime Interrupt dispatch time Pre-emption None of the above None Hint 6). Which one of the following is a monolithic kernel-based operating system? QNX VxWorks Both a and b None of the above None Hint 7). Which one of the following uses a priority based pre-emptive scheduling algorithm for thread allocation? QNX VxWorks Both a and b None of the above None Hint 8). Which one of the following operating system is deterministic? Traditional OS RTOS Both a and b None of the above None Hint 9). In __________________ the secondary storage is required to run large processes? Traditional OS RTOS Both a and b None of the above None Hint 10). What is the standard form of RTOS? Real Time Operating System Real Telemetry Operating System Real Transport Operating System None of the above None Hint 11). Which one of the following OS is less efficient? Time sharing OS Multitasking OS Both a and b None of the above None Hint 12). In which one of the following only one CPU is needed? Multiprogramming Multitasking Both a and b None of the above None Hint 13). In which one of the following one process is executed at a time? Multiprocessing Multiprogramming Multitasking Both a and b None Hint 14). Which one of the following takes more time to execute the process? Multiprocessing Multiprogramming Multitasking Both a and b None Hint 15). Which one of the following helps in developing efficient programs? Multitasking Multithreading Both a and b None of the above None Hint 16). The multitasking is categorized into ______________________ types? One Two Three Four None Hint 17). Which one of the following is designed for performance? VRTXsa VRTXmc Both a and b None of the above None Hint 18). In which one of the following kernels run time is less? Monolithic kernel Microkernel Both a and b None of the above None Hint 19). The size of data files is small/medium in _____________ RTOS? Soft Hard Both a and b None of the above None Hint 20). The real time operating system categorized into ____________________ types? Two Three Four Five None Hint RTOS MCQ for Quiz 21). Which one of the following helps in developing efficient operating systems? Multitasking Multithreading Both a and b None of the above None Hint 22). The data integrity is short term in __________________ real time system? Soft Hard Both a and b None of the above None Hint 23). The error detection is an autonomous in __________________ real time system? Soft Hard Both a and b None of the above None Hint 24). Which one of the following can’t use virtual memory? Real time system Non-real time system Both a and b None of the above None Hint 25). Which one of the following systems can be expressed as quantitative expression of time? Real time system Non-real time system Both a and b None of the above None Hint 26). The satellite tracking is an example for ________________ system? Non-real time system Real time system Both a and b None of the above None Hint 27). Which one of the following is easy to install and economical? Distributed OS Network OS Both a and b None of the above None Hint 28). In which one of the following operating system the local resources are managed by local OS? NOS DOS Both a and b None of the above None Hint 29). Which one of the following is an example of commercial RTOS? LynxOS VxWorks Both a and b None of the above None Hint 30). In _______________ real time system, the missing deadline has catastrophic results for the system? Hard Firm Soft Non-real time None Hint 31). In ___________________ memory allocation, memory requests are made at run time? Static Dynamic Both a and b None of the above None Hint 32). Which one of the following operating system is non-deterministic? Traditional OS RTOS Both a and b None of the above None Hint 33). In which one of the following kernels run time is high? Monolithic kernel Microkernel Both a and b None of the above None Hint 34). The peak load performance is predictable in _______________ real time operating system? Soft Hard Both a and b None of the above None Hint 35). In which one of the following operating system the resources owned by local nodes? Distributed OS Network OS Both a and b None of the above None Hint 36). The websites and services are an example for _________________ RTOS? Soft Hard Both a and b None of the above None Hint 37). The air traffic control is an example for _________________ RTOS? Soft Hard Both a and b None of the above None Hint 38). What is the standard form of BSP? Board Single Packages Board Simple Packages Board Support Packages None of the above None Hint 39). The batch processing jobs is an example for ________________ system? Non-real time system Real time system Both a and b None of the above None Hint 40). The create, query, get, and put are functions comes under __________________ function? Memory IPC Both a and b None of the above None Hint RTOS MCQs for Interviews 41). Which one of the following uses a priority driven pre-emptive and round robin scheduling algorithms? QNX VxWorks Both a and b None of the above None Hint 42). Which one of the following takes less time to execute the process? Multiprocessing Multiprogramming Multitasking Both a and b None Hint 43). Which one of the following is based on context switching concept? Multiprogramming Multitasking Both a and b None of the above None Hint 44). Which one of the following supports executions of multiple programs simultaneously? Multiprogramming Multitasking Multithreading None of the above None Hint 45). How many multitasking kernels does VRTX have? Two Three Four Five None Hint 46). Which one of the following systems can be used in critical systems? Real time system Non-real time system Both a and b None of the above None Hint 47). In which one of the following operating systems managed by distributed OS? NOS DOS Both a and b None of the above None Hint 48). What is the standard form of RTEMS? Real Time Executive for Microcontroller System Real Time Executive for Multithreading System Real Time Executive for Multiprocessor System None of the above None Hint 49). In _______________ real time system, the system fails if deadline window is missed? Hard Soft Both a and b None of the above None Hint 50). In _______________ real time system, the deadlines may be missed and can be recovered? Hard Firm Soft Non-real time None Hint 51). In which one of the following, more than one process can be executed at a time? Multiprocessing Multiprogramming Multitasking Both a and b None Hint 52). Which one of the following has flat memory model? Real time system Non-real time system Both a and b None of the above None Hint 53). Which one of the following has low interrupt latency? Real time system Non-real time system Both a and b None of the above None Hint 54). What is the standard form of TCB? Task Common Block Time Control Block Task Control Block None of the above None Hint 55). In which one of the following operating system, the priority inversion is a major issue? RTOS GPOS Both a and b None of the above None Hint 56). The page faults are categorized into ____________________ types? One Two Three Four None Hint 57). Which one of the following resources is dedicated to a particular process? Private Shared Exclusive Critical None Hint 58). Which one of the following is a major job of RTOS? Task management Event management Both a and b None of the above None Hint 59). Which one of the following resources is used by more than one process? Private Shared Exclusive Critical None Hint 60). In _______________ real time system, no deadlines have to be met? Hard Firm Soft Non-real time None Hint RTOS MCQ for Exams 61). How many states are needed to allow the CPU to schedule? Two Three Four Five None Hint 62). What is the standard form of ISR? Interrupt Service Routines Internal Service Routines Interrupt Service RTOS None of the above None Hint 63). What is the standard form of EDF? Earliest Design First Earliest Description First Earliest Deadline First None of the above None Hint 64). Which one of the following is not large in memory? RTOS Desktop OS Both a and b None of the above None Hint 65). Which one of the following dedicated to single work? Real time system Non-real time system Both a and b None of the above None Hint 66). Which one of the following is designed for low memory consumption? VRTXsa VRTXmc Both a and b None of the above None Hint 67). Which one of the following supports executions of multiple ports of a single program simultaneously? Multiprogramming Multitasking Multithreading None of the above None Hint 68). Which one of the following is based on time sharing concept? Multiprogramming Multitasking Both a and b None of the above None Hint 69). In which one of the following, multiple CPUs are required? Multiprogramming Multitasking Both a and b None of the above None Hint 70). What are the problems of operating system structure? Easier to debug Easier to scale Overhead is high None of the above None Hint 71). The synchronization and coordination come under __________________ task of an OS? Process management Inter process communication Memory management Input/output management None Hint 72). What is the standard form of POSIX? Portable Operating System Internal Portable Operating System Intermission Portable Operating System Interface None of the above None Hint 73). In ___________________ memory allocation all memory allocated to each process at system start-up? Static Dynamic Both a and b None of the above None Hint 74). Which one of the following is a microcontroller-based operating system? QNX VxWorks Both a and b None of the above None Hint 75). The secondary storage is usually limited and missing in __________________? Traditional OS RTOS Both a and b None of the above None Hint Please fill in the comment box below. Time's up
