Operating System Quiz

When using the Critical Regions solution, which of the following conditions is NOT necessary?

• Processes entering critical regions must set their speed or number of CPUs.

• Two processes are not in critical regions at the same time.

• A process outside the staging area must not prevent other processes from entering critical regions.

• Processes do not have to wait indefinitely to enter critical regions.

Which of the following cannot be shared among different threads of a process?

• process's code

• Open files

• process's data

• thread's stack

Which of the following is not a common directory attribute or property?

• Directory name

• Directory structure

• Directory owner

• Directory path

Which of the following is NOT a responsibility of Device-Independent I/O Software layer?

• Uniform interfacing for device drivers

• Allocating and releasing dedicated devices

• Providing a device-independent block size

• Allocating port numbers to I/O devices

Which of the following is NOT one of the usual duties of Clock Software?

• Maintaining the time of day.

• Helping processes in running longer than they are allowed to.

• Accounting for CPU usage.

• Handling the alarm system call made by user processes.

What is NOT an operating system mode?

• System mode

• User mode

• Kernel mode

• Supervisor mode

What is the DISADVANTAGE of segmentation in the memory management?

• It can have external fragmentation.

• The average segment size is larger than the actual page size.

• It is easier to relocate segments than the entire address space.

• The segment table is smaller as compared to the page table.

What are the four important issues for I/O software?

• Error handling

• Device independence

• Synchronous and Asynchronous

• Uniform naming

• Buffering

What are the three basic ways I/O operations can be performed?

• Programmed I/O

• Memory-mapped I/O

• Interrupt-driven I/O

• I/O using DMA

What is the primary purpose of using paging in memory management?

• To reduce the access time for data in memory.

• To allow multiple processes to share the same physical memory.

• To eliminate fragmentation and improve memory utilization.

• To organize memory into fixed-size blocks for efficient storage.