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It is an object of a number of classes whose purpose is to indicate that a real object of that class does not exist. One common use for a null object is a return value from a member function that is supposed to return an object with some specified properties but cannot search such an object.
? Activities: An activity shows an action that performed in the system. ? Transitions: Transitions are shown by open arrow heads. Transitions are used to specify the flow among
What are the two levels in defining a Match Code? Match Code Object. Match Code Id.
Differentiate between Gateways and Bridges. A machine that connects a LAN to the Internet is termed as a gateway. The gateway machine is responsible for routing packets that ar
What is a recursively enumerable language? The languages that is accepted by TM is said to be recursively enumerable (r. e) languages. Enumerable means that the stri
Hardware that calculates CRC (Cyclic Redundancy Check) uses: Hardware which computes CRC utilizes shift register and Xor unit.
Q. Explain Automated and Manual systems? Automated and Manual systems: The system that doesn't need human intervention is known as'Automated system'. In this system whole proce
Explain the components of Information Super Highway Infrastructure. The Information Superhighway is more than the Internet. It is a sequence of components, having the collectio
A PCM system uses 8 bits per sample and the analog signal is limited to 4.3 kHz. The PCM data is transmitted using (a) BFSK and (b) ASK. Determine the bandwidth required for transm
If you open your computers case, the motherboard is the flat, rectangular piece of circuit board to which the whole thing seems to connect to for one reason or one another. It'
define about data movement
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