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This set of MCQs helps students to learn about a microprocessor with memory management which is the process of controlling and coordinating computer memory, assigning portions called blocks to various running programs to optimize overall system performance. and protection defined as a way to control memory access rights on a computer, and is a part of most modern instruction set architectures and operating systems. The main purpose of memory protection is to prevent a process from accessing memory that has not been allocated to it.
A task with privilege level 0, doesn’t refer to all the lower level privilege descriptors in
The 80286 is able to address the physical memory of,
8 MB
16 MB
24 MB
64 MB
The 80286 is able to operate with the clock frequency of,
12.5 MHz
10 MHz
8 MHz
All of the mentioned
The management of the memory system required to ensure the smooth execution of the running process is done by,
Control unit
Memory
Memory management unit
Bus interface unit
The fetching of the program from secondary memory to place it in physical memory, during the execution of CPU is called
Mapping
Swapping in
Swapping out
Pipelining
The process of making the physical memory free by storing the portion of program and partial results in the secondary storage called,
Mapping
Swapping in
Swapping out
Pipelining
The memory management and protection mechanisms are disabled when the 80286 is operated in,
Normal mode
Real address mode
Virtual address mode
All of the mentioned
By using a privilege mechanism the protection from unauthorized accesses is done to,
Operating system
Interrupt handlers
System software
All of the mentioned
The task privilege level at the instant of execution is called,
Descriptor privilege level (DPL)
Current privilege level (CPL)
Effective privilege level (EPL)
None of the mentioned
Once the CPL is selected, it can be changed by
Hold
Transferring control using system descriptors
Transferring control using gate descriptors
Transferring control using interrupt descriptors
The memory that is considered as a large logical memory space, that is not available physically is
Logical memory
Auxiliary memory
Imaginary memory
Virtual memory
Memory management deals with:
Data protection
Unauthorized access prevention
Segmented memory
All of the mentioned
The memory management and protection mechanisms are enabled with advanced instruction set when 80286 is operated in,
Normal mode
Real address mode
Virtual address mode
All of the mentioned
The 80286 is an upward object code compatible with 8086 or 8088 when operated in,
Normal mode
Real address mode
Virtual address mode
Real and virtual address mode
The data segments defined in GDT (global descriptor table) and the LDT (local descriptor table) can be accessed by a task with,
Privilege level 0
Privilege level 1
Privilege level 2
Privilege level 3
