Technical Questions

The HELLO protocol uses time instead of distance to determine optimal routing. It is an alternative to the Routing

Information Protocol.

A shell is an interactive user interface to an operating system services that allows an user to enter commands as character strings or through a graphical user interface. The shell converts them to system calls to the OS or forks off a process to execute the command. System call results and other information from the OS are presented to the user through an interactive interface. Commonly used shells are sh,csh,ks etc.

The data bus is Bi-directional because the same bus is used for transfer of data between Micro Processor and momory of input / output devices in both the direction.

A real time process is a process that must respond to the eventswithin a certain time period. A real time operating system is an operating system that can run realtime processes successfully.

Configuration Management is a support for software in managing the different items in the product, and changes in them.

A test plan is the master document that contains all details pertaining to testing of the application. Its contents include:

Testing scope - what is included and what is not included in the testing of the current project 

Assumptions - what are the assumptions that are made for this project 

Milestones - major dates like when testing is going to begin, when it is planned to end, what is the trace review date, what is the production date etc. 

Resources - the resources working on this project along with their contact details 

Defect tracking mechanism - what defect tracking tool will be used, what is the SLA for fixing Critical to Low level IRs etc. 

Test management procedures - who will be notified when there is a critical IR, what reports will be sent daily, if status calls will be held daily or weekly, where will it be held, who is required to join etc. 

Work allocation - resource distribution if more projects are being tested 

Entry and exit criterion - when can a project be accepted for testing (eg. only when smoke testing passes) and when can a project be termed as testing complete (eg. when all testcases are executed and all high level bugs are fixed)

It is a collection of routers under the control of a single administrative authority and that uses a common Interior Gateway Protocol

Distributed systems work in a network. They can share the network resources, communicate with each other.