In this section of Operating System Main Memory – Memory Management.it contain Operating System Main Memory – Contiguous-Noncontiguous Memory Allocation MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in detail reading of Operating System subject as the hardness level of MCQs have been kept to advance level.
This MCQs section is mainly focused on below lists of topics
- Contiguous Memory Allocation
- NonContiguous Memory Allocation
- -Logical Addresses, Physical Addresses and Address translation
- -Approaches to Noncontiguous Memory allocation
- Paging
- Segmentation
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. Contiguous memory allocation is the classical memory allocation model in which
- Same process is allocated in a different area in the memory
- all the process is allocated a single contiguous area in the memory
- Each process is allocated a single contiguous area in the memory
- All of the above
2. Contiguous memory allocation faces the problem of
- Memory fragmentation
- Page Faults
- less throughput
- Less hit ratio
3. In Contiguous memory allocation _________ has no cure
- Internal fragmentation
- External fragmentation
- inline fragmentation
- outline fragmentation
Because Kernel has no means of estimating the memory requirement of a process accurately
4. The technique of memory compaction and reuse of memory can be applied to overcome the problem of
- Internal fragmentation
- External fragmentation
- Page Faults
- Swapping
5. Memory compaction involves _________
- removing of memory
- No Relocation
- Static relocation
- Dynamic relocation
6. Dynamic Relocation is not feasible without_____
- Program Counter
- Special Purpose Register
- Relocation Register
- Program status Word
7. NonContiguous memory allocation is a model in which
- Portion of its address space are distributed among many areas of memory
- all the process is allocated a single continuous area in the memory
- Each process is allocated a single continuous area in the memory
- All of the above
8. In NonContiguous memory allocation _______
- it increases the external fragmentation
- it reduce the external fragmentation
- it increases the internal fragmentation
- it reduce the internal fragmentation
This model of memory allocation permits the kernel to reuse free memory areas that are smaller than the size of a process, so it can reduce external fragmentation.
9. logical address is the address______
- constituents the physical address space
- of an instruction or data byte as used in a process.
- in a memory where an instruction or data byte exists
- All of the above
it may be obtained using index,base,or segment registers.The logical address in a process
constitutes the logical address space of the process
10. physical address is the address______
- constituents the logical address space
- of an instruction or data byte as used in a process.
- in a memory where an instruction or data byte exists
- All of the above
The set of physical addresses in the system constitutes the physical address space of the system.
11. The CPU sends the __________ of each data or instruction used in the process to the MMU.
- Physical address
- logical address
- effective address
- None of the above
12. The MMU uses the memory allocation information stored in the table to compute the corresponding __________
- Physical address
- logical address
- effective address
- None of the above
13. The procedure of computing the effective memory address from a logical address is called______
- physical address translation
- logical address translation
- address translation
- All of the above
14. in Non-contiguous memory allocation the kernel allocates a single memory area to a process.
- TRUE
- FALSE
Because Kernel allocates single memory area to a process in contiguous memory allocation.In NonContiguous allocation,the kernel allocates several memory area to a process-each memory area holds one component of the process.
15. In Contiguous allocation address translation is not required
- TRUE
- FALSE
In NonContiguous allocation address translation is performed by the MMU during program execution.
16. In Contiguous allocation external fragmentation arises if first-fit,best-fit,or next-fit allocation is used.internal fragmentation arises if memory allocation is performed in blocks of a few standard sizes.
- TRUE
- FALSE
17. In NonContiguous allocation unless the computer system provides the relocation register,swapped-in process must be places in its originally allocated area.
- TRUE
- FALSE
Because in NonContiguous allocation component of a swapped-in process can be placed anywhere in memory and and it Contiguous allocation unless the computer system provides the relocation register,swapped-in process must be places in its originally allocated area.
18. Which of the following is the fundamental approaches to implement Non-contiguous memory allocation?
- Paging
- Segmentation
- Memory compaction
- power of 2 allocator
- 1,2
- 2,3
- 3,4
- 1,4
