操作系统考试题1

Multiple Choice

1.What are the major activities of an operating system?

A:User management B:Main Memory management

C:I/O system management D:File management

Answer:BCD

2.The way that operating system components are interconnected and modeled into a kernel can be?

A:Simple structure B:Micro kernels

C:Layered approach D:Prototype approach

Answer:ABC

3.What state is a process in when it can not run because it needs a resource to become available?

A:Ready B:Interrupt

C:Blocked D:Running

Answer:C

4.Which are the major differences between user-level threads and kernel-level threads?

A:User-level threads are unknown by the kernel, whereas the kernel is aware of kernel threads.

B:User threads are scheduled by the thread library and the kernel schedules kernel threads. C:Kernel threads need not be associated with a process whereas every user thread belongs to a process.

D:One user-level thread can be only mapped by one kernel thread.

Answer:ABC

5.Which of the following free-space management strategies are supported by an operating system?

A:Bit Vector B:Linked list

C:Grouping D:Counting

Answer:ABCD

6.What refers to the page replacement algorithm which replaces the page that has not been used for the longest period of time?

A:FIFO B:LRU

C:OPT D:LFU

Answer:B

7.Which of the followings is a condition for deadlock?

A:Starvation B:Circular Wait

C:No Preemption D:Mutual Exclusion

Answer:BCD

8.Which of the following strategies need base register and length register?

A:paging B:segmentation

C:segmentation with paging D:fixed sized partitions memory management

Answer:ABC

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