Virtual Tables:- The virtual table is a lookup table of functions used to resolve function calls in a dynamic or late binding manner. The virtual table is also called by other names, such as vtable or virtual function table, virtual method table or dispatch table. Every class that uses virtual functions or which is derived from a class that uses virtual functions is given its own virtual table. The vtable is a static array that the compiler sets up at compile time. A virtual table contains one entry for each virtual function that can be called by objects of the class. Each entry in this table is a function pointer that points to the most-derived function accessible by the class. The compiler also adds a hidden pointer to the base class, which will be *__vptr. *__vptr which is set automatically when a class instance is created so that it points to the virtual table for that class. The *this pointer, which is actually a function parameter used by the compiler to resolve self-references, *__vptr is a real pointer. Consequently, it makes each class object allocated bigger by the size of one pointer. It also means that *__vptr is inherited by derived classes. Virtual functions are most commonly implemented using virtual function tables, or vtables. Each class that declares at least one virtual function has a hidden data member (e.g., _ _vtbl). The _ _vtbl member points to an array of function pointers. Every derived class has a copy of the table. Every instance of a class…
running head: VIRTUAL MEMORY MANAGER
Assignment #4: Virtual memory manager
Dr. Romy Lu
Saturday, August 31, 2013
Most operating systems use a virtual memory manager (VMM) whose responsibility is to manage the relationship between the virtual organization of memory as seen by an application with the physical organization of memory from the operating system’s point of view. Virtual memory addresses must be mapped to physical address and vice…
computing environment by using a technology that is part of Windows Server 2008. The improvements to Hyper-V include new live migration functionality, support for dynamic virtual machine storage, and enhancements to processor and networking support.
Live migration functionality allows you to transparently move running virtual machines from one node of the failover cluster to another node in the same cluster without a dropped network connection or perceived downtime. Live migration requires the failover…
values for quantities such as temperature, pressure, and volume for a gas liberated in a chemical reaction.
Graded Activities in This Lesson
Lab Report (offline, scored by teacher)
Gas Laws Virtual Lab
Link here for the Virtual Lab: http://k12.http.internapcdn.net/k12_vitalstream_com/CURRICULUM/928314/CURRENT_RELEASE/VHS_CHEM_GasLaws.html
As you read through the lesson online, use the space below to take notes. You will need your notes to study
The study framework
The other key dimensions are used to conceptualize
cyber behaviors in the research questionnaire
Entertainment-surfing on internet for cyber game;
Virtual social intercourse- surfing on internet for online
Virtual emotion- surfing on internet for cyber sex and
Information searching- surfing on internet for searching
latest information that really relates with research.
The instrument of the study was…
the process is running. This value contains the base address of the table of Page Directory Entries (PDE) for that process. Every virtual address that is translated, has a PDE specified using some of the bits from the original virtual address. The PDE is used to find the base address of a specific page of Page Table Entries (PTE). This specific PTE is designated using this base address and some more bits from the original virtual address. The PTE will now point to the base address of the page in…
Table for Individual Question Feedback
At its most primitive, a ____ is a repeater with more than one output port.
Table for Individual Question Feedback
____ refers to dialing directly into a private network’s or ISP’s remote access server to log on to a network.
A) Dial-up networking
B) Traditional networking
C) Dialed networking
D) Virtual networking…
Component/s:Framework agents process
In some cases, documents that are indexed may be virtual children of those that are queued. A good example of this is RSS feeds where the data being indexed all comes from the feed.
In order to implement this, the following changes would be required:
(1) IProcessActivity.ingestDocument() has a variant which allows you to include a virtual child document identifier in addition to the main document identifier.
(2) IIncrementalIngester's addOrReplaceDocument…
of the operating system. Its basic function is to manage the memory hierarchy of RAM and secondary memory devices. There is always a need of more memory than physical memory. Memory management allows this to be done through the concept of virtual memory. Virtual memory can be many times larger than the physical memory. The most important task of memory management includes allocation and dealloacation of memory to the processes running on the system. Other requirements of memory management are relocation…
Datagram vs. Virtual Circuit
In a virtual circuit network
In a datagram network
Mi: ith datagram sent
by Host M.
All packets of the same virtual circuit
travel along the same path.
Two packets of the same user pair can
travel along different routes.
Packet sequencing is guaranteed.
The packets can arrive out of sequence. Packets contain short VC Id. (VCI).
Packets contain full Src, Dst addresses. Each VC occupies routing table entries…
Virtual Lab: The Cell Cycle and Cancer
1. Open the virtual lab: The Cell Cycle and Cancer
2. Click on the Laboratory Exercise link.
3. Click on the microscope in the lab simulation to examine the different stages of mitosis as they appear in different tissue samples. Three types of tissue are available for examination: lung, stomach, and ovary. Samples of normal tissue and cancerous tissue are included. Click on the tissue box to examine different tissues. Examine both normal…