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Concepts and Architecture Interview Questions & Answers - Learning Mode
COOLINTERVIEW.COM ORACLE INTERVIEW QUESTIONS CONCEPTS AND ARCHITECTURE INTERVIEW QUESTIONS 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 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: CoolInterview.com
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: CoolInterview.com
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: CoolInterview.com
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: CoolInterview.com
Question: What is an Index Segment ?

Answer: Each Index has an Index segment that stores all of its data. Source: CoolInterview.com
Question: What are the types of Database Links ?

Answer: Private Database Link, Public Database Link & Network Database Link. Source: CoolInterview.com
Question: What are the Referential actions supported by FOREIGN KEY integrity constraint ?

Answer: UPDATE and DELETE Restrict - A referential integrity rule that disallows the update or deletion of referenced data.
DELETE Cascade - When a referenced row is deleted all associated dependent rows are deleted. Source: CoolInterview.com
Question: What is Public Database Link ?

Answer: Public database link is created for the special user group PUBLIC. A public database link can be used when any user in the associated database specifies a global object name in a SQL statement or object definition. Source: CoolInterview.com
Question: What is a Data Segment ?

Answer: Each Non-clustered table has a data segment. All of the table's data is stored in the extents of its data segment. Each cluster has a data segment. The data of every table in the cluster is stored in the cluster's data segment. Source: CoolInterview.com
Question: What are the components of Logical database structure of ORACLE database?

Answer: Tablespaces and the Database's Schema Objects. Source: CoolInterview.com
Question: What are the Limitations of a CHECK Constraint ?

Answer: The condition must be a Boolean expression evaluated using the values in the row being inserted or updated and can't contain sub queries, sequence, the SYSDATE,UID,USER or USERENV SQL functions, or the pseudo columns LEVEL or ROWNUM. Source: CoolInterview.com
Question: What is Network Database link ?

Answer: Network database link is created and managed by a network domain service. A network database link can be used when any user of any database in the network specifies a global object name in a SQL statement or object definition. Source: CoolInterview.com
Question: What are Clusters ?

Answer: Clusters are groups of one or more tables physically stores together to share common columns and are often used together. Source: CoolInterview.com
Question: What is Index Cluster ?

Answer: A Cluster with an index on the Cluster Key. Source: CoolInterview.com
Question: What is a Synonym ?

Answer: A synonym is an alias for a table, view, sequence or program unit. Source: CoolInterview.com
Question: What is a View ?

Answer: A view is a virtual table. Every view has a Query attached to it. (The Query is a SELECT statement that identifies the columns and rows of the table(s) the view uses.) Source: CoolInterview.com
Question: What does a Control file Contain ?

Answer: A Control file records the physical structure of the database. It contains the following information. Database Name
Names and locations of a database's files and redolog files.
Time stamp of database creation. Source: CoolInterview.com
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: CoolInterview.com
Question: How to define Data Block size ?

Answer: A data block size is specified for each ORACLE database when the database is created. A database users and allocated free database space in ORACLE datablocks. Block size is specified in INIT.ORA file and can?t be changed latter. Source: CoolInterview.com
Question: What is Database Link ?

Answer: A database link is a named object that describes a "path" from one database to another. Source: CoolInterview.com

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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
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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
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