What is a trap and trapdoor?
Trapdoor is a secret undocumented entry point into a program used to grant access without normal methods of access authentication. A trap is a software interrupt,... Read more »
Archive for June, 2006
In loading programs into memory, what is the difference between load-time dynamic linking and run-time dynamic linking?
For load-time dynamic linking: Load module to be loaded is read into memory. Any reference to a target external module causes that module to be loaded and the references... Read more »
Is Windows NT a full blown object oriented operating system? Give reasons.
No Windows NT is not so, because its not implemented in object oriented language and the data structures reside within one executive component and are not represented... Read more »
What are the sub-components of I/O manager in Windows NT?
> Network redirector/ Server > Cache manager. > File systems > Network driver > Device driver Read more »
What is an .ASP file?
It is a Text File that contains the combination of the following: • Text • HTML tags • Script Commands Read more »
What is CLR?
The Common Language Runtime (CLR), which is the execution environment for all programs in the .NET Framework. The CLR is similar to a Java Virtual Machine (VM) in... Read more »
When does the condition ‘rendezvous’ arise?
In message passing, it is the condition in which, both, the sender and receiver are blocked until the message is delivered. Read more »
What is the Translation Lookaside Buffer (TLB)?
In a cached system, the base addresses of the last few referenced pages is maintained in registers called the TLB that aids in faster lookup. TLB contains those... Read more »
What is meant by arm-stickiness?
If one or a few processes have a high access rate to data on one track of a storage disk, then they may monopolize the device by repeated requests to that track.... Read more »
When is a system in safe state?
The set of dispatchable processes is in a safe state if there exists at least one temporal order in which all processes can be run to completion without resulting... Read more »
What is meant by Proactive, Retroactive and Simultaneous Update.
Proactive Update: The updates that are applied to database before it becomes effective in real world . Retroactive Update: The updates that are applied to database... Read more »
What is cold backup and hot backup (in case of Oracle)?
Cold Backup: It is copying the three sets of files (database files, redo logs, and control file) when the instance is shut down. This is a straight file copy, usually... Read more »
What is Authorization and Integrity manager?
It is the program module, which tests for the satisfaction of integrity constraint and checks the authority of user to access data. Read more »
What is an Oracle Instance?
The Oracle system processes, also known as Oracle background processes, provide functions for the user processes—functions that would otherwise be done by the... Read more »
What are partial, alternate,, artificial, compound and natural key?
Partial Key: It is a set of attributes that can uniquely identify weak entities and that are related to same owner entity. It is sometime called as Discriminator. Alternate... Read more »