Database General Idea: (Yes/No) Is every table in an SQLite on-disk database sto

Question

Database General Idea:

(Yes/No) Is every table in an SQLite on-disk database stored in its own file? ________

What kinds of indexes are supported in SQLite? a) B-tree indexes, b) hash indexes, or c)
both ___________

(True/False) B-tree indexes are used in SQLite to store both tables and indexes. _______

(True/False) SQLite tables that store system information are stored as B-trees. _______

(Yes/No) Is it possible to create an SQLite index on only specified rows of a table? _______

f. The cost of searching a B+ tree is closely related to: a) the number of nodes in the tree, b) the depth of the tree, or c) the value of the smallest search key at the root node of the tree? ______

True or false: B+ trees can be used to find all records with search keys belonging to a certain range. True_____ False_____

Assuming good design, which do you expect to give the faster search result? a) a search tree, b) a hash table. ___________

True or false: a benefit of a B+ tree is that it stays balanced as updates occur. True______ False_____.

True or false: In a hash table, the need for overflow buckets increases if the hash function does not assign search keys to buckets in a random way. True______ False _______

What works better for a query that specifies a range of values: a) an ordered index, or b) a hash table? ______

(This question requires the use of Google) With MySQL, can a database administrator specify that a hash index is to be used with a table? Yes _____ No ______

(Fill in the blank) In the worst case, lookup using a hash table is no better than ______________________________.

All nodes in a B+ tree contain search keys. Pointers to file records are contained in: a) all nodes, b) leaf nodes only, or c) non-leaf nodes only? _______

When B+ trees are used in databases, a non-leaf node of the tree will often have a hundred or more child nodes. Why? Is it: a) because a node is taken to be the same size as a disk block, b) to save on pointer storage, or c) to increase disk accesses. _______

Explanation / Answer

a) Answer is Yes

The state of all the tables in an SQLite database is stored in a single disk file named "main database file".

when any transaction is done some additional information is stored in another file the "rollback journal"/if DB is open in WAL mode all metadata is pushed into a write-ahead log file. During app/computer crash before the transaction is commited, the data /state is restored from either of these files.

b) Answer is option a) B-tree indexes only supported which are used for storing tables and indexes data.

c) Answer is TRUE

B-trees indexes are used to store tables and indexes and tehy can quickly access data and sort it.Even DB operations are efficient.

d) Answer is TRUE

In SQLite each table data is stored on a single B-tree.Every for index the same applies.

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