A composite primary key<span> is a set of several primary </span>keys<span> that, together, uniquely identifies each record.</span>
Primary keys are used as identifiers of composite entities. In this case each primary key combination is allowed only once in the *:* relationship.
Other case where primary keys are used is as identifiers of weak entities, where the weak entity has a strong identifying relationship with the parent entity.
Answer:
D. O(NlogN)
Explanation:
The computation of the overall algorithm cost is as follows:
Given that
O(logN) + O(N) × O(logN) + 1
In the case of complexity we considered the high order that dominates the other terms
Thus, that term would be
O(N) × O(logN)
It could be rewrite as
O(NlogN)
Hence, the correct option is D.
All the other options are wrong
Answer:
System of linear equations is solved below and explained in detail.
Explanation:
Part a:
M = [1 3 5 2; 2 -4 7 -3; 0 -4 -7 3; 5 -3 2 1];
c = [7; -3; -1; 0];
Part b:
The statement used for the solution of system of linear equation will be:
X = linsolve(M,c)
where X will give the values of x1, x2, x3, x4 respectively.
Part c:
The system is solved in matlab using above equation and the results are attached in a file.
The values for X are:
x1 = -2/7
x2 = 3/7
x3 = 4/7
x4 = 11/7
Answer:
Block Chain is a system of recording information that makes it difficult or impossible to change, hack, or cheat the system.
A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain.
Hope this helps.
x
Answer:
Grass
Explanation:
When the wind blows grass or small plants start dancing (?)
<em>#</em><em>S</em><em>p</em><em>r</em><em>e</em><em>a</em><em>d</em><em>T</em><em>h</em><em>e</em><em>K</em><em>n</em><em>o</em><em>w</em><em>l</em><em>e</em><em>d</em><em>g</em><em>e</em>
