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Concepts and Architecture Interview Questions & Answers - Learning Mode

Concepts and Architecture Interview Questions & Answers - Learning Mode

An Oracle database server consists of an Oracle database and an Oracle instance. Every time a database is started, a system global area (SGA) is allocated and Oracle background processes are started. The combination of the background processes and memory buffers is called an Oracle instance.

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Data Modeling Interview Questions & Answers (11) Learning Mode | Exam Mode

Data Structures Interview Questions & Answers (104) Learning Mode | Exam Mode

OLAP Interview Questions & Answers (35) Learning Mode | Exam Mode

OOPS Interview Questions & Answers (68) Learning Mode | Exam Mode

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Concepts and Architecture Interview Questions & Answers - Learning Mode
Try Concepts and Architecture Interview Questions & Answers - Exam Mode
Question: What are the components of Logical database structure of ORACLE database?

Answer: Tablespaces and the Database's Schema Objects. Source:
Question: How are Indexes Update ?

Answer: Indexes are automatically maintained and used by ORACLE. Changes to table data are automatically incorporated into all relevant indexes. Source:
Question: When can Hash Cluster used ?

Answer: Hash clusters are better choice when a table is often queried with equality queries. For such queries the specified cluster key value is hashed. The resulting hash key value points directly to the area on disk that stores the specified rows. Source:
Question: What is schema?

Answer: A schema is collection of database objects of a User. Source:
Question: What is a Data Dictionary ?

Answer: The data dictionary of an ORACLE database is a set of tables and views that are used as a read-only reference about the database.
It stores information about both the logical and physical structure of the database, the valid users of an ORACLE database, integrity constraints defined for tables in the database and space allocated for a schema object and how much of it is being used. Source:
Question: What is Table ?

Answer: A table is the basic unit of data storage in an ORACLE database. The tables of a database hold all of the user accessible data. Table data is stored in rows and columns. Source:
Question: What is a Temporary Segment ?

Answer: Temporary segments are created by ORACLE when a SQL statement needs a temporary work area to complete execution. When the statement finishes execution, the temporary segment extents are released to the system for future use. Source:
Question: What are the uses of Rollback Segment ?

Answer: Rollback Segments are used :
To generate read-consistent database information during database recovery to rollback uncommitted transactions for users. Source:
Question: What is a Tablespace?

Answer: A database is divided into Logical Storage Unit called tablespaces. A tablespace is used to grouped related logical structures together. Source:
Question: What are synonyms used for ?

Answer: Synonyms are used to : Mask the real name and owner of an object.
Provide public access to an object Provide location transparency for tables, views or program units of a remote database. Simplify the SQL statements for database users. Source:
Question: What is Hash Cluster ?

Answer: A row is stored in a hash cluster based on the result of applying a hash function to the row's cluster key value. All rows with the same hash key value are stores together on disk. Source:
Question: What is a Data File ?

Answer: Every ORACLE database has one or more physical data files. A database's data files contain all the database data. The data of logical database structures such as tables and indexes is physically stored in the data files allocated for a database. Source:
Question: Can an Integrity Constraint be enforced on a table if some existing table data does not satisfy the constraint ?

Answer: No. Source:
Question: What are Schema Objects ?

Answer: Schema objects are the logical structures that directly refer to the database's data. Schema objects include tables, views, sequences, synonyms, indexes, clusters, database triggers, procedures, functions packages and database links. Source:
Question: What is an Extent ?

Answer: An Extent is a specific number of contiguous data blocks, obtained in a single allocation, and used to store a specific type of information. Source:
Question: What are the components of Physical database structure of Oracle Database?

Answer: ORACLE database is comprised of three types of files. One or more Data files, two are more Redo Log files, and one or more Control files. Source:
Question: What are the different type of Segments ?

Answer: Data Segment, Index Segment, Rollback Segment and Temporary Segment. Source:
Question: What is Data Block ?

Answer: ORACLE database's data is stored in data blocks. One data block corresponds to a specific number of bytes of physical database space on disk. Source:
Question: What is the use of Redo Log Information ?

Answer: The Information in a redo log file is used only to recover the database from a system or media failure prevents database data from being written to a database's data files. Source:
Question: What is a Redo Log ?

Answer: The set of Redo Log files for a database is collectively known as the database's redo log. Source:

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Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
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