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Access also supports the creation of "pass-through queries". These snippets of SQL code can address external data sources through the use of ODBC connections on the local machine. This enables users to interact with data stored outside the Access program without using linked tables or Jet. [44]
In the United States, the formal term for a black project is an unacknowledged special access program (SAP). Black projects receive their funding from the black budget. The US depends on private defense contractors to develop and build military equipment. The two most notable examples are Lockheed Martin and Northrop Grumman.
An access matrix can be envisioned as a rectangular array of cells, with one row per subject and one column per object. The entry in a cell – that is, the entry for a particular subject-object pair – indicates the access mode that the subject is permitted to exercise on the object.
Jet, being part of a relational database management system (RDBMS), allows the manipulation of relational databases. [1] It offers a single interface that other software can use to access Microsoft databases and provides support for security, referential integrity, transaction processing, indexing, record and page locking, and data replication.
Access to the labels and control mechanisms are not [citation needed] robustly protected from corruption in protected domain maintained by a kernel. The applications a user runs are combined with the security label at which the user works in the session. Access to information, programs and devices are only weakly controlled [citation needed].
Based on the original definition of Weiser, [3] informally, a static program slice S consists of all statements in program P that may affect the value of variable v in a statement x. The slice is defined for a slicing criterion C=(x,v) where x is a statement in program P and v is variable in x.
Random access compared to sequential access. Random access (also called direct access) is the ability to access an arbitrary element of a sequence in equal time or any datum from a population of addressable elements roughly as easily and efficiently as any other, no matter how many elements may be in the set.
A program can share a page with another program by sending it a capability to access that page. The kernel ensures that programs access only pages for which they have a capability. Disk storage The kernel identifies disk blocks to the application program by their physical block address, allowing the application to optimize data placement.