11. Which of the memory organization is widely used in parity bit?
A. by 1 organization
B. by 4 organization
C. by 8 organization
D. by 9 organization
Answer: A
The use of By 1 organization is declined because of the wider data path devices. But it is still used in parity bit and were used in SIMM memory.
12. Which configuration of memory organization replaces By 1 organization?
A. by 4 organization
B. by 8 organization
C. by 9 organization
D. by 16 organization
Answer: A
By 1 organization is replaced with By 4 organization because of its reduced address bus and complexity.
13. Which shifting helps in finding the physical address in 8086?
A. shifting the segment by 8
B. shifting the segment by 6
C. shifting the segment by 4
D. shifting the segment by 2
Answer: C
The address bus of the 8086 is 20-bit and the data bus is 16-bit in size. So the physical address can be calculated by shifting the segment register by 4 to left and by adding the address bus to it.
14. Which memory organization is supported in wider memories?
A. by 8 organization
B. by 16 organization
C. by 9 organization
D. by 4 organization
Answer: B
The wider memories support 16-bits because it can integrate more number of the interface logic so that the time consumed by the latches and buffers removes the memory access thus allowing the slower parts to be used in wait state free designs.
15. Which of the following is a plastic package used primarily for DRAM?
A. SIMM
B. DIMM
C. Zig-zag
D. Dual-in-line
Answer: C
A zig-zag package of memory is a plastic package used for DRAM. The leads of this package are arranged in a zigzag manner.
16. 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.
17. 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.
18. 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.
19. 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.
20. 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.
