What is 255.255.255.255 used for?

Correct Answer: When the computers on the network simply listen and receive the signal, they are referred to as passive because they don?t amplify the signal in any way Example forpassive topology - linear bus

Correct Answer: An Android Intent is an abstract description of an operation to be performed It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a background ServiceThe intent itself, an Intent object, is a passive data structure holding an abstract description of an operation to be performed Android provides many ways of storing data of an application One of this way is called Shared Preferences Shared Preferences allow you to save and retrieve data in the form of key,value pair In order to use shared preferences, you have to call a method getSharedPreferences() that returns a SharedPreference instance pointing to the file that contains the values of preferences

Correct Answer: Dalvik serves as a virtual machine, and it is where every Android application runs Through Dalvik, a device is able to execute multiple virtual machines efficiently through better memory management

Correct Answer: Adb is short for Android Debug Bridge It allows developers the power to execute remote shell commands Its basic function is to allow and control communication towards and from the emulator port

Correct Answer: There are many answers here: Reduce image sizes, remove unnecessary widgets, HTTP compression, put CSS at the top and script references at the bottom or in external files, reduce lookups, minimize redirects, caching, etc

Correct Answer: - Divide the data into sections - Add the sections together using 1's complement arithmetic - Take the complement of the final sum, this is the check sum

Correct Answer: A network that has only one entry and exit point.

Explanation:

A stub network has only one default path to non-local hosts and no outside network knowledge. Non-local stub network traffic uses a single logical path when traveling in and out of the network.

 

Stub networks are essentially local area networks (LAN) that either do not connect to the outside and relay data packets internally or are dead-end LANs that know of only one network exit. Stub networks may have multiple connections but use one path to single points of destination.

 

Hence, a stub network is a network that has only one entry and exit point.

Correct Answer: network layer

Correct Answer: JAD (Joint Application Development) is a methodology that involves the client or end user in the design and development of an application, through a succession of collaborative workshops called JAD sessions The JAD approach, in comparison with the more traditional practice, is thought to lead to faster development times and greater client satisfaction, because the client is involved throughout the development process In comparison, in the traditional approach to systems development, the developer investigates the system requirements and develops an application, with client input consisting of a series of interviews

Correct Answer: Traceability matrix is a cross matrix for recording the requirements through each stage of the requirements gathering process This matrix should also take into account any changes in the scope during the life of the project At the end of the project this matrix should show each function built into a system, its source and the reason that any stated requirements may not have been delivered