Answer the following questions true (T) or false (F)
1. A stream is an object that allows for the flow of data between your program and some I/O device or some file.
2. Every input file and every output file used by your program has only one name which is the same name used by the operating system.
1. True
2. False
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Answer the following statements true (T) or false (F)
1) The connectivity is a term used for relationships in the E-R diagram. 2) The partial dependency can exist in a table with a simple primary key. 3) In transitive dependency, an attribute is dependent on the primary key in another table. 4) Higher the normal form means lower redundancy. 5) The normalization is a process of converting database from lower to higher normal form.
When do you use the function c_str?
a) When you are reading the file name using >> b) When the file contains strings c) When the file name contains a blank d) When the file contains C-style strings
Which of the following statements about general-list searches and traversals is false?
A. Searches must be done using a sequential search algorithm. B. General list traversals start at the beginning and process each node until the last node has been processed. C. The link field in the current node is used to determine which node is processed next. D. The search algorithm uses a predecessor pointer. E. The end of the search is identified by a null link node.
The following multiversion concurrency control has been proposed.
Reads are satisfied using the (committed) version of the database that existed when the transaction made its first read request. Writes are controlled by long-duration write locks on tables. Does the control always produce serializable schedules? If not, give a nonserializable schedule it might produce.