Real Time Operating system MCQ Quiz – Objective Question with Answer for Real Time Operating system

71. Which of the following supports the MS-DOS file?

A. pNA+ network-manager
B. pSOS+ kernel
C. pSOS+ m
D. pHILE+ file system

Answer: D

The pHILE+ file system supports the MS-DOS file structure and the product can provide input and output files.

 

72. Who developed the OS-9?

A. Microwave
B. Microwave and Motorola
C. Motorola and IBM
D. Microwave and IBM

Answer: B

The OS-9 is developed by Motorola and Microwave as a real-time operating system. The operating system is developed for MC6809 which is an 8-bit processor.

 

73. Who developed VRTX-32?

A. Microtec Research
B. Microwave
C. Motorola
D. IBM

Answer: A

The VRTX-32 is developed by Microtec Research which is a high-performance real-time kernel.

 

74. Which provides the library interface to allow C programs to call standard I/O functions?

A. RTL
B. TNX
C. IFX
D. MPV

Answer: A

The RTL is run-time library support for Microtec and the Sun compilers and can provide the library interface to allow the C programs to call the standard I/O functions.

 

75. Which of the following unit protects the memory?

A. bus interface unit
B. execution unit
C. memory management unit
D. peripheral unit

Answer: C

The resources have to be protected in an embedded system and the most important resource to be protected is the memory which is protected by the memory management unit through different programming.

 

76. Which unit protects the hardware?

A. MMU
B. hardware unit
C. bus interface unit
D. execution unit

Answer: A

The hardware part is protected by the memory management unit. The memory part is also protected by the memory management unit. The hardware such as the input-output devices is protected and is prevented from direct access.

 

77. Which mechanism can control the access?

A. in-situ
B. spin-lock
C. ex-situ
D. both in-situ and ex-situ

Answer: B

Both the memory and the hardware part are protected by the memory management unit and the hardware such as the input-output devices are protected, These are prevented from the direct access. These accesses are made through a device driver and this device driver can control the serial port. Such a mechanism is called a spin-lock mechanism which provides the control access.

 

78. Which of the following is very resilient to system crashes?

A. Windows 3.1
B. MS-DOS
C. Windows NT
D. kernel

Answer: C

The Windows NT is very resilient to the system crashes and the system will continue while the processes can crash. This is because of the user mode and the kernel mode which is coupled with the resource protection. This resilience is a big advantage over MS-DOS and Windows 3.1.

 

79. Which of the following are coupled with the Windows NT for resource protection?

A. kernel mode and user mode
B. user mode and protected mode
C. protected mode and real mode
D. virtual mode and kernel mode

Answer: A

The user mode and the kernel mode are coupled with resource protection and this resilience in Windows NT is a big advantage over the MS-DOS and Windows 3.1.

 

80. Which of the following support multi-threaded software?

A. Windows NT
B. thread
C. process
D. task

Answer: A

The Windows NT supports multi-threaded software in which the processes can support several independent paths or threads.

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