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Which type of data file access allows access to any piece of data in the file without reading the data that comes before it?
Direct access. AS
Differences among sequential access direct access?
Let's say you have a set of 100 pieces of data, which are all names. Now, if you want to find a specific name, "Kevin", you can find it in different ways. You could either go through each of the records one after another, or you could randomly generate a number, and check if that record is "Kevin", this is potentially faster than sequential access as "Kevin" could be the last record.
A program that uses prompting messages to direct the user's input is running in?
Interactive mode
What are advantages and disadvantages of contiguous memory allocation?
The advantage of contiguous memory allocation is 1. It supports fast sequential and direct access 2. It provides a good performance 3. the number of disk seek required is minimal The disadvantage of contiguous memory allocation is fragmentation.
Encapsulation in vb.net?
Encapsulation in VB.NET is a fundamental concept of object-oriented programming that restricts direct access to an object's data and methods, promoting data hiding. It is achieved through access modifiers such as Private, Public, and Protected, which control the visibility of class members. By using properties, developers can expose data in a controlled manner, allowing for validation and logic to be implemented when getting or setting values. This helps maintain the integrity of the data and promotes a clear interface for interaction with the object.
How does Direct Access work?
Direct access is designed to give the user of a computer direct access to their internal network over the internet, and is in many ways similar to VPN's.
Which nation had direct access to the pacific ocean?
No European nation , until 1763 that Russia had direct access to the Pacific.
What companies offer direct market access?
Not many companies offer direct market access. The ones that do offer direct market access include: London Stock Exchange, NASDAQ, and AVATAR Securities.
How do you use a program as a direct object?
To use a program as a direct object, you simply perform an action on the program directly. For example, "I use the program to edit photos." The program is the direct object in this sentence because it is the recipient of the action of being used.
Serial and direct access?
direct access allows you to access the needed record directly with serial access u have to go through all the others before arriving to the desired one
Is it possible to use floppy disk without using Direct Memory Access?
DMA or Direct Memory Access is the process of getting memory (RAM) without using the CPU. It is turned on based on the program you are running. It is used for things like making sounds while a game is running or for moving data from a floppy and hard drives into RAM. So the program you are running will determine if DMA is used, it does not matter if it is a floppy.
The Mayflower Compact is an example of which concept?
direct democracy
How can pointer become a source of mysterious program bug?
Pointers allow direct memory access if you try to read to change it at wrong time your system might throw blue screen or just have critical error preventing your program from running.
use the word program as a direct object?
Write a program for this process.
File accessing techniques in data management system?
Information is kept in files. Files reside on secondary storage. When this information is to be used, it has to be accessed and brought into primary main memory. Information in files could be accessed in many ways. It is usually dependent on an application.Sequential Access: A simple access method, information in a file is accessed sequentially one record after another. To process the with record all the 1-1 records previous to 1 must be accessed. Sequential access is based on the tape model that is inherently a sequential access device. Sequential access is best suited where most of the records in a file are to be processed. For example, transaction files.Direct Access: Sometimes it is not necessary to process every record in a file. It may not be necessary to process records in the order in which they are present. Information present in a record of a file is to be accessed only if some key value in that record is known. In all such cases, direct access is used. Direct access is based on the disk that is a direct access device and allows random access of any file block. Since a file is a collection of physical blocks, any block and hence the records in that block are accessed. For example, master files. Databases are often of this type since they allow query processing that involves immediate access to large amounts of information. All reservation systems fall into this category. Not all operating systems support direct access files. Usually files are to be defined as sequential or direct at the time of creation and accessed accordingly later. Sequential access of a direct access file is possible but direct access of a sequential file is not.Indexed Sequential Access: This access method is a slight modification of the direct access method. It is in fact a combination of both the sequential access as well as direct access. The main concept is to access a file direct first and then sequentially from that point onwards. This access method involves maintaining an index. The index is a pointer to a block. To access a record in a file, a direct access of the index is made. The information obtained from this access is used to access the file. For example, the direct access to a file will give the block address and within the block the record is accessed sequentially. Sometimes indexes may be big. So hierarchies of indexes are built in which one direct access of an index leads to info to access another index directly and so on till the actual file is accessed sequentially for the particular record. The main advantage in this type of access is that both direct and sequential access of files is possible.
What are the differences between direct access and random access?
Direct access means going straight to the record you want,and random access means pick data randomly and then find that data which you required.http://wiki.answers.com/Difference_between_direct_and_sequential_access#ixzz1685bfqda
What is DASD?
Direct access storage device
