Answer:
See explaination
Explanation:
The reasons why indexed sequential search structure is better are:
1. In index sequential search any field of the records can be used as the key. This key field can be numerical or alphanumerical.
2. Since each record has its data block address, searching for a record in larger database is easy and quick. There is no extra effort to search records. But proper primary key has to be selected to make efficient.
3. This method gives flexibility of using any column as key field and index will be generated based on that. In addition to the primary key and its index, we can have index generated for other fields too. Hence searching becomes more efficient, if there is search based on columns other than primary key.
The reasons why 5 B-tree is better:
1.The B-tree Provides support for range of queries in an efficient manner and You can iterate over an ordered list of elements.
2. B-Tree algorithms are good for accessing pages (or blocks) of stored information which are then copied into main memory for processing. In the worst case, they are designed to do dynamic set operations in O(lg n) time because of their high "branching factor" (think hundreds or thousands of keys off of any node). It is this branching factor that makes B-Trees so efficient for block storage/retrieval, since a large branching factor greatly reduces the height of the tree and thus the number of disk accesses needed to find any key.
3. It is a generalization of a BST in that a node can have more than two children. These are self-balancing and hence the average and worst complexities is logarithmic. We opt for these when the data is too huge to fit in main memory. These structures are used in database indexing and help in faster operations on disk
the additional informations is we should first decide to choose which structure is suiatable for which algoritm in terms of space and time and then use the appropriate search algorithm.
Answer:
The answer to this question is given below in the explanation section.
Explanation:
This question has two option, and this question is asked about how study group working effectively.
A group has agreed to meet twice a week to study for an upcoming test. However, the study group has irregular attendance because some members skip sessions without notice.
This option does not fulfill the objective of the study group working effectively. Because, in this option some members are irregular and skip sessions without notice which does not the objective of study group working effectively.
During the study sessions, the attending group members discuss each other's class notes, ask each other open-
ended questions, drill each other on concepts, and come up with possible test questions. structuring their study sessions well using good listenings is having thoughtful discussions sharing their notes freely with each other showing a commitment to the group.
This option fulfills the objective of studying in a group. This option is correct and it matches with studying in a group effectively.
The device that acts like a wireless base station in a network would be an access point. It acts as a bridge between the wireless and wired networks. It receives and transmits signal between networks. It connects every user in that network.
<u>Answer:</u>
<em> </em><em>Modem is an hybrid device,</em><em> which is responsible for modulating and demodulating information. </em><em>It is a transmission medium and also it is a hardware tool used for connecting to internet.</em>
<u>Explanation:</u>
What is modulation?, let us understand. The <em>process of converting analog to digital signal is called modulation and demodulation is vice-versa.</em> The computer connects internet classically using telephone wire.
The <em>telephone wire understands only analog signal and a computer understands only digital signal.</em> So Modem’s role is to take care of this aspect while <em>connecting to the internet.</em>
