Run time mapping from virtual to physical address is done by ____________

Which of the following statements is/are correct? 1. An address generated by the CPU is commonly referred to as a physical address. 2. An address seen by the memory unit is commonly referred to as a logical address. 3. The run-time mapping from virtual to physical address is done by the memory management unit (MMU). Select the correct answer using the code given below.

A

1 only

B

2 only

C

3 only

D

1, 2 and 3

The following sentences form a paragraph. The sentences P,Q,R and S are not ordered properly.Choose the option that arranges these sentences in the proper order. P. A person using virtual reality equipment is able to "look around" the artificial world, move around in it, and interact with virtual features or items. Q. Their aim is to simulate a user's physical presence in a virtual or imaginary environment. R. Current VR technology most commonly uses virtual reality headsets or multi-projected environment. S. They use sometimes in combination with physical environments or props, to generate realistic images, sounds and other sensations.

A

PSQR

B

RSQP

C

PRSQ

D

PQRS

The run time mapping from virtual to physical addresses is done by a hardware device called the ____________

A

Virtual to physical mapper

B

Memory management unit

C

Memory mapping unit

D

None of the mentioned

Using the page table shown below, translate the physical address 25 to virtual address. The address length is 16 bits and page size is 2048 words while the size of the physical memory is four frames. Page Present (1-In, 0-Out) Frame 0 1 3 1 1 2 2 1 0 3 0 -

A

25

B

6169

C

2073

D

4121

Given below are four statements- (p) The second principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (q) The second principal focus of a lens is the position of the image, real or virtual whose object is at infinity. (r) The first principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (s) The first principal focus of a lens is the position of the image, real or virtual whose object is at infinity. Examine the above statements and find which among then are correct.

A

(q) & (r)

B

(p) & (s)

C

(q) & (s)

D

(p) & (r)

Which two statements describe the IP address 10.16.3.65/23?
1. The subnet address is 10.16.3.0 255.255.254.0.
2. The lowest host address in the subnet is 10.16.2.1 255.255.254.0.
3. The last valid host address in the subnet is 10.16.2.254 255.255.254.0.
4. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.

A

1 and 3

B

2 and 4

C

1, 2 and 4

D

2, 3 and 4

E

2 and 5 only

The physical address translation in virtual memory address with memory Management Unit (MMU) is done by which one of the following mechanisms?

A

Multiply virtual address by some constant

B

Translation lookaside buffer (TLB)

C

encryption key

D

Using general purpose register in CPU

A multilevel page table is preferred in comparison to a single level page table for translating virtual address to physical address because ____________

A

it reduces the memory access time to read or write a memory location

B

it helps to reduce the size of page table needed to implement the virtual address space of a process

C

it is required by the translation lookaside buffer

D

it helps to reduce the number of page faults in page replacement algorithms

Which of the following visualization is most commonly achieved through a mapping mechanism where a logical storage address is translated into a physical storage address?

A

Storage

B

Network

C

Software

D

None of the mentioned

If the number of bits in a virtual address of a program is 16 and the page size is 0.5 K bytes, the number of pages in the virtual address space is

A

16

B

32

C

64

D

128

E

None of the above

Run time mapping from virtual to physical address is done by ____________

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