What are the benefits of using index file for a relation? Write the advantage(s) of sparse index and dense index file.
Advantages
Sparse indexing allows you to specify the conditions under which a pointer segment is suppressed, not generated, and put in the index database. Sparse indexing has two advantages. The primary one is that it reduces the size of the index, saving space and decreasing maintenance of the index. By decreasing the size of the index, performance is improved. The second advantage is that you do not need to generate unnecessary index entries.
In dense index, there is an index record for every search key value in the database. This makes searching faster but requires more space to store index records itself. Index records contain search key value and a pointer to the actual record on the disk.
What are the benefits of using index file for a relation? Write the advantage(s) of sparse index and dense index file.
a) Using examples differentiate dense matrix from sparse matrix. b) Using examples, describe matrix-vector multiplication and matrix multiplication. Explain why such computations are suitable for parallel processing c) Describe dynamic programming d) Describe five computer problems that can be solved using dynamic programming approach. e) Describe recent advances in parallel computing
Assume a relation is structured with a sequential file organization and has fixed length records. Also assume that after processing, the relation is fully "sequentially ordered" and that no subsequent changes have been made. Assume a disk block has 10240 bytes, a record is 1000 bytes, and an index is 16 bytes. The indices are "sparse" and at the bottom level, point to the first record of the pertinent disk block. How many disk blocks are needed to account for...
What are two benefits of an ETF that passively follows the S&P 500 Index.
what is the main advantage of using R2 over error variance an index of how well our model predicts actual data?
Assume that you have built a dense B+-tree index on SSN, and the B+-tree's leaf nodes contain record ids pointing to data records in data file. Assume 10-byte long. Assume also that you built the tree by using bulk loading so that the nodes at each level were filled up as much as possible. 4. a. b. How many levels does the resulting tree have? For each level of the tree, how many nodes are at that level? How many...
What are the benefits of holding a portfolio entirely composed of the S&P 500 Index instead of investing only in Alphabet stock? Thank you!
Please be sure to justify the running times you claim using what you know about the cost of Dijkstra’s algorithm and the meaning of dense and sparse graphs. We know that our input graph G = (V,E) is sparse. What is the asymptotic running time in terms of |V|?
What the benefit is of storing an index file that is separate from the file of records?
What are the benefits and disadvantages of object-oriented programming? What is the difference between a flat-file database and a relational database? In what situations is it more appropriate to a flat-file database over a relational database, and vice versa? What are the advantages to using cookies to power a web application? Are there any risks involved using cookies?
A system that is using File Allocation Table to index files. Each FAT entry is using 20 bits and each disk block is 8K in size. How many files can be stored in this system? What is the maximum hard drive, this system can support?