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Hashing is the most common form of purely random access to a file or database. It is
also used to access columns that do not have an index as an optimisation technique.
Hash functions calculate the address of the page in which the record is to be stored
based on one or more fields in the record. The records in a hash file appear randomly
distributed across the available space. It requires some hashing algorithm and the
technique. Hashing Algorithm converts a primary key value into a record address. The
most popular form of hashing is division hashing with chained overflow.
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What is the purpose of MD5 hash calculation?
MD5 check sum is unique for a file content and is used to check the integrity of the file content. If file is to be transferred using network, recipient can calculate the MD5 hash and check it with the MD5 check sum of sender, if both are same, he can be sure of non-corruption of file in transit.
What is multikey file organization?
to have a data file with multiple access path is known as multi key file organization
Implementation of index sequential file organization?
Indexed sequential file organization. =In indexed sequential file organization, the records arestored in sequence according to a primary key and an index is created to allow random access of the file. This type of organization also allows the file to be accessed sequentially. Indexed sequential is the most commonlyused type of file organization. writer-k.k.b -montanna
Difference between file processing and dbms?
File based approach can be attributed to two factors: 1. the definition of the data is embedded in the application programs, rather than being stored separately and independently. 2. there is no control over the access and manipulation of data beyond that imposed by the application programs. To become more effective, a new approach was required. What emerged were the database and the DBMS (Database management system).
What is hash key?
hash key is an element in the hash table. it is the data that you will combine (mathematical) with hash function to produce the hash.
What is file organization in DBMS?
file organization
What is an explanation of the hash file organization?
hash file organisation is containing the record of the file.
What are Different types of file organisation in DBMS?
Heap file organization Sequential File Organization Hashing File organization
Concept of file handling in DBMS?
if we need a modifying ,sreach,delete a file so we need a DBMS
Difference between DBMS flat file system?
In DBMS Multiple user can access file at a time. but in flat file system only one user can access file at a time
Similarities between database file and flat file in DBMS?
kas
What is meant by hashing of a file?
Hashing a file is retrieving its unique hash. Any file is different and they all have other hashes. You can compare hashes with the fingerprint of a human. These hashes serve for many purposes.Virustotal.com for example, uses hashes to identify files which have already been scanned before. Many distributors of huge files (such as game clients or operating systems such as Ubuntu) often show the MD5 hash of the file. If you hash the file and get the same MD5 hash, the file has been downloaded entirely with no errors.You can hash a file using various applications. I use HashTab for that.
Anyone please decrypt this md5 code 1abd31faff12d5809c81e30b1ba07cb0?
MD5 is a one-way hashing algorithm. If you take plain text and run it through the hashing algorithm, it produces a hash string such as the one in the question. If you take a file and compare it to the known hash that is supposed to have been produced from that file, you can tell if the file has been tampered with. If the hash of the file matches the hash you were provided that is supposed to have come from the file, then the file has not been altered - at least in theory. In reality, researchers have demonstrated that it is possible to create another file that will yield the same hash even though the files are different. With all that in mind, you should realize that you cannot go backwards from the hash to a unique initial text. There are literally an infinite number of files that can produce the same hash so you don't "decrypt" and MD5 hash.
Can anyone decrypt this hash please 9b4563331828d9aa435ba3ad65257b8c?
A hash cannot be "decrypted". It's a hash, meaning it's a validation of a file, to ensure the file's integrity. It's also constructed in a way, so it's virtually impossible to modify a file to match a specific hash value.
What is the difference between flat file and DBMS?
A flat file is a simple file containing data without any structured format, while a Database Management System (DBMS) is a software system that manages databases by organizing, storing, and retrieving data. A DBMS allows for more organized and efficient data management, supports relationships between data, and provides features like security and data integrity that are not available with flat files.
What are the three rules for a forensic hash?
The same input will always produce the same hash. It is a one-way function, meaning it is difficult to reverse the process and obtain the original input from the hash. A small change in the input will produce a significantly different hash value.
What is the best way of referring to the output of a secure hash function?
The output from a hash function is referred to as the hash value, hash code, hash sum, checksum or just plain "hash" as in "the hash of the file is...". Generally a hash function is presumed to be secure or it wouldn't be used. If a hash is not secure it could be referred to as "worthless" or "false sense of security".
