Super key is the union of a set of attribute which are primary key.

Cycle in wait for graph confirms the deadlock.

Parsing is the technique for syntax analysis.

In foxpro environment, record marked for deletion gets confirmly deleted through ZAP command.

QUEL is a part of DB II.

All the attributes of all involved relation are combined in cartesian product.

Structure of a database at a particular time is instance.

Hash file is used for efficient searching.

A host language is the DML embedded in the general purpose language.

ACID means atomicity, consistency, isolation,  and durability.Atomicity requires that each transaction is "all or nothing": if one part of the transaction fails, the entire transaction fails, and the database state is left unchanged. An atomic system must guarantee atomicity in each and every situation, including power failures, errors, and crashes. To the outside world, a committed transaction appears (by its effects on the database) to be indivisible ("atomThe consistency property ensures that any transaction will bring the database from one valid state to another. Any data written to the database must be valid according to all defined rules, including but not limited to constraints, cascades, triggers, and any combination thereof. This does not guarantee correctness of the transaction in all ways the application programmer might have wanted (that is the responsibility of application-level code) but merely that any programming errors do not violate any defined rules.ic"), and an aborted transaction does not happen.The consistency property ensures that any transaction will bring the database from one valid state to another. Any data written to the database must be valid according to all defined rules, including but not limited to constraints, cascades, triggers, and any combination thereof. This does not guarantee correctness of the transaction in all ways the application programmer might have wanted (that is the responsibility of application-level code) but merely that any programming errors do not violate any defined rules.The isolation property ensures that the concurrent execution of transactions results in a system state that would be obtained if transactions were executed serially, i.e. one after the other. Providing isolation is the main goal of concurrency control. Depending on concurrency control method, the effects of an incomplete transaction might not even be visible to another transaction.Durability means that once a transaction has been committed, it will remain so, even in the event of power loss, crashes, or errors. In a relational database, for instance, once a group of SQL statements execute, the results need to be stored permanently (even if the database crashes immediately thereafter). To defend against power loss, transactions (or their effects) must be recorded in a non-volatile memory.

Yes, it is correct by defination.

An attribute means property of data.

DBA stands for Database administrator

It is incorrect.

Interface is the means of interaction.

Redundancy means duplicate/repeated data.

Lock will make it non-shareable.

Oracle is client server application development.

It shows how data is actually stored.

Hash value points to the element exactly using index.