Embedded System Memory Management MCQ Quiz – Objective Question with Answer for Embedded System Memory Management

1. Which of the following have a 16 Mbytes addressed range?

A. PowerPC
B. M68000
C. DSP56000
D. TMS 320

Answer: B

The M68000 family has a 16 Mbyte addressing range. The PowerPC family has a larger 4 Gbyte range and the DSP56000 has a 128-kilo word address space.


2. Which of the following can destroy the accuracy of the algorithms?

A. delays
B. error signal
C. interrupt
D. mmu

Answer: A

The delays occurring in the memory management unit can destroy the accuracy of the algorithms and avoid this, the linear addressing range should be increased.


3. How many numbers of ways are possible for allocating the memory to the modular blocks?

A. 1
B. 2
C. 3
D. 4

Answer: C

Most of the systems have a multitasking operating system in which the software consists of modular blocks of codes which run under the control of the operating system. There are three ways for allocating memory to these blocks. The first way distributes the block in a predefined way. The second way of allocating memory includes relocation or position independence in the software and the other way of allocating memory to the block is the address translation in which the logical address is translated to the physical address.


4. Which of the following is replaced with the absolute addressing mode?

A. relative addressing mode
B. protective addressing mode
C. virtual addressing mode
D. temporary addressing mode

Answer: A

The memory allocation of the modular blocks can be done by writing the software program in a relocatable or position-independent manner which can execute anywhere in the memory map, but relocatable code must have the same address between its data and code segments. This is used to avoid the use of absolute addressing modes which are replaced by the relative addressing modes.


5. What is the main purpose of the memory management unit?

A. address translation
B. large storage
C. reduce the size
D. provides address space

Answer: A

The memory management unit handles physical addresses. Therefore, the virtual or the logical address is first translated to the physical address.

6. Which of the following provides stability to the multitasking system?

A. memory
D. Memory partitioning

Answer: D

The memory partitioning provides stability to the multitasking system so that the errors within one task will not corrupt the other tasks.


7. Which of the following is used by the M68000 family?

A. M68000
B. 80386
C. 8086
D. 80286

Answer: A

The M68000 uses memory partitioning by the use of function code or by the combination of superscalar signals and the Harvard architecture.


8. What can be done for the fine-grain protection of the processor?

A. add an extra description bit
B. add error signal
C. add wait stage
D. remains unchanged

Answer: A

The finer grain protection of memory management is achieved by the addition of an extra description bit to an address to declare its status. The memory management unit can detect an error if the task attempts to access memory that has not been allocated to it or a certain kind of mismatch occurs.


9. Which of the following technique is used by the UNIX operating system?

A. logical address memory
B. physical address memory
C. virtual memory technique
D. translational address

Answer: C

In the workstation and the UNIX operating system, the virtual memory technique is frequently used in which the main memory is divided into different segments and pages. These pages will have a virtual address which can increase the address spacing.


10. Which of the following consist of two lines of legs on both sides of a plastic or ceramic body?

C. Zig-zag
D. Dual-in-line

Answer: D

The dual-in-line package consists of two lines of legs on both sides of the plastic or ceramic. Most commonly used are BIOS EPROMs, DRAM, and SRAM.

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