Answer:
The correct answer for the given question is option(B) i.e "database system"
Explanation:
Database is the collection of interrelated data .Database system is an organization of components that define and regulate the collection, storage and manage the data.Database system maintain the integrity in the database. Database system provides an interface to the database for information storage and retrieval.
Transaction is the contract between a buyer and a seller to interchange goods or services. it does not regulate the collection store the data so this option is wrong .
Structured data and management system does not store the data that define and regulate the collection in organization. So this option is also wrong
So correct answer is database system.
PKI trust model that should be used, is a distributed trust model.
- A distributed trust is a trust model that gives power to different source while taking the power away from a single source and thereafter, shares that responsibility to the wide range of sources. It is important as it allows trust to flows through network, marketplaces and forums.
- With the use of this distributed trust model, Sigma Technology can have multiple CAs in different locations to work on behalf of the company. And even if one is absence, other CAs can still issue certificate without any hindrances.
Conclusively, we can say that PKI trust model that should be used is a distributed trust model.
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Answer:
- def getCharacterForward(char, key):
- charList = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-
- if(len(char) > 1):
- return None
- elif(not isinstance(key, int)):
- return -1
- else:
- index = charList.find(char)
- if(index + key <= 25):
- return charList[index + key]
- else:
- return charList[(index + key)% 26]
-
- print(getCharacterForward("C", 4))
- print(getCharacterForward("X", 4))
Explanation:
Firstly, define a charList that includes all uppercase alphabets (Line 2). We presume this program will only handle uppercase characters.
Follow the question requirement and define necessary input validation such as checking if the char is a single character (Line 4). We can do the validation by checking if the length of the char is more than 1, if so, this is not a single character and should return None (Line 5). Next, validate the key by using isinstance function to see if this is an integer. If this is not an integer return -1 (Line 6 - 7).
Otherwise, the program will proceed to find the index of char in the charList using find method (Line 9). Next, we can add the key to index and use the result value to get forwarded character from the charList and return it as output (Line 11).
However, we need to deal a situation that the char is found at close end of the charList and the forward key steps will be out of range of alphabet list. For example the char is X and the key is 4, the four steps forward will result in out of range error. To handle this situation, we can move the last two forward steps from the starting point of the charList. So X move forward 4 will become B. We can implement this logic by having index + key modulus by 26 (Line 13).
We can test the function will passing two sample set of arguments (Line 15 - 16) and we shall get the output as follows:
G
B
Answer: Mutual authentication
Explanation: Mutual authentication could be referred to a vetting process where the two entities in communication authenticate each other, it could also be referred to as a two-way authentication.
In the scenario above, the cloud service or server authenticates itself with the client and the client authentication itself with the cloud service server by verifying or vetting the certificates of both communicating entities before a secure encrypted connection would be established or created.
The decimal value 15 would be A. 00001111
