TYPES OF SOFTWARE SYSTEMS
Filed Under System, Software | Posted on May 25, 2008
BATCH SYSTEMS : They are a set of programs that perform certain activities which do not require any kind of input from the user. Batch systems contain one or more API which perform various tasks.
Ex: When something is typed on a word document by pressing a key, same is displayed on the monitor. The process […]
Deadlock - Algorithms
Filed Under Algorithms, Deadlock | Posted on May 25, 2008
BANKER’S ALGORITHM
Consider an example:
There are four customers: A, B, C and D, which are analogous to four processes.
The credit unit is like the resource
The banker himself is the OS
Assume each credit unit = Rs. 1000.
Not all customers need their maximum credit immediately. Hence only 10 credit units are reserved.
Process Current Max. Free = 10
A […]
Deadlock avoidance and prevention
Filed Under Prevent, Deadlock | Posted on May 25, 2008
Deadlock Prevention
In order to prevent deadlock, the system is built in such a way that no deadlock occurs. Make sure that at least one of the four conditions in which deadlock can occur does not exist.
Attacking Hold and wait : In order to ensure that hold and wait condition never occurs, two protocols can be […]
Deadlock situation
Filed Under Deadlock | Posted on May 25, 2008
A deadlock is a situation wherein two or more competing actions are waiting for the other to finish, and thus neither ever does. In the computing world deadlock refers to a specific condition when two or more processes are each waiting for another to release a resource, or more than two processes are waiting for […]
Usability testing process
Filed Under Usability, Testing, Process | Posted on May 16, 2008
Usability testing can make a lot of difference to the ultimate success of the products of the company, and needs to be well planned. If you do the test wrong, or have some of the parameters wrong, then this could have negative results for the company (in addition, you could end up letting the key […]
Defect Management
Filed Under Defect | Posted on May 9, 2008
What is a defect?
For a test engineer, a defect is:
• Any deviation from a given specification.
• Anything that causes user dissatisfaction
• Incorrect output
• Software is not behaving the way it should behave.
Difference between bug, defect and error:-
• Software is said to have a bug if the features deviate from the specifications.
• Software is said to have a defect if it is […]
