Subnet & subnet calculation

By creating smaller IP networks (instead of having one large network), we can obtain better security, smaller collision and broadcast domains, and greater administrative control of each network. Think of a network like streets in a city. Each house on this network is known by the street and by the address. Think of the addresses on the houses as the hardware addresses of a host. For IP to communicate with a host, the IP address must be known, and the router connected to the network on which this host is located must also know the hardware address of the house.

MCQs on Microprocessors

 1. A memory system has a total of 8 memory chips, each with 12 address lines and 4 data lines. The total size of the memory system is

a) 16 Kbytes     b) 48 Kbytes     c) 32 Kbytes     d) 64 Kbytes

Ans: Option a)
Each chip has 2¹² = 4096 x 4 bits
Capacity of 8 chips = 4096 x 4 x 8 = 16 Kbytes

Dependency Preserving Decomposition in DBMS

Decomposition - This means replacing a relation with a collection of smaller relations. 

Abstract data type

               An abstract data type (ADT) is a specification of a set of data and the set of operations that can be performed on the data.

Knapsack problem

              Greedy method is best suited to solve more complex problems such as a knapsack problem. 

GREEDY METHOD

           Greedy method is a method of choosing a subset of the data set as the solution set that results in some profit.