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Memory Management Interview Questions & Answers - Learning Mode

Memory Management Interview Questions & Answers - Learning Mode

Memory management is the act of managing computer memory at the system level. The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and free it for reuse when no longer needed. Memory management is the functionality of an operating system which handles or manages primary memory. Memory management keeps track of each and every memory location either it is allocated to some process or it is free. It checks how much memory is to be allocated to processes.

Try Memory Management Interview Questions & Answers - Exam Mode

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Memory Management Interview Questions & Answers - Learning Mode
Try Memory Management Interview Questions & Answers - Exam Mode
Question: What is the use of RECORD LENGTH option in EXP command ?

Answer: Record length in bytes. Source:
Question: What is a Control file ?

Answer: Database overall physical architecture is maintained in a file called control file. It will be used to maintain internal consistency and guide recovery operations. Multiple copies of control files are advisable. Source:
Question: List the sequence of events when a large transaction that exceeds beyond its optimal value when an entry wraps and causes the rollback segment toexpand into another extend.

Answer: Transaction Begins.
An entry is made in the RES header for new transactions entry
Transaction acquires blocks in an extent of RBS
The entry attempts to wrap into second extent. None is available, so that the RBS must extent. The RBS checks to see if it is part of its OPTIMAL size. RBS chooses its oldest inactive segment.
Oldest inactive segment is eliminated. RBS extents
The Data dictionary table for space management are updated.
Transaction Completes. Source:
Question: When will be a segment released ?

Answer: When Segment is dropped.
When Shrink (RBS only)
When truncated (TRUNCATE used with drop storage option) Source:
Question: What is a Shared SQL pool?

Answer: The data dictionary cache is stored in an area in SGA called the Shared SQL Pool. This will allow sharing of parsed SQL statements among concurrent users. Source:
Question: What is the use of ANALYSE ( Ver 7) option in EXP command ?

Answer: A flag to indicate whether statistical information about the exported objects should be written to export dump file. Source:
Question: How to implement the multiple control files for an existing database ?

Answer: Shutdown the database
Copy one of the existing control file to new location
Edit Config ora file by adding new control file. name
Restart the database. Source:
Question: How does Space allocation table place within a block ?

Answer: Each block contains entries as follows
Fixed block header
Variable block header
Row Header,row date (multiple rows may exists)
PCTEREE (% of free space for row updation in future) Source:
Question: What are the different methods of backing up oracle database ?

Answer: - Logical Backups
- Cold Backups
- Hot Backups (Archive log) Source:
Question: It is possible to use raw devices as data files and what are the advantages over file system files

Answer: Yes.

The advantages over file system files.

I/O will be improved because Oracle is bye-passing the kernnel which writing into disk.
Disk Corruption will be very less. Source:
Question: What is a logical backup?

Answer: Logical backup involves reading a set of database records and writing them into a file. Export utility is used for taking backup and Import utility is used to recover from backup. Source:
Question: What are the problems that arise with absolute addresses in terms of swapping?

Answer: When a program is loaded into memory at different locations, the absolute addresses will not work without software or hardware tricks. Source:
Question: Why would an overlay be used?

Answer: Overlay be used as some programs require more main memory than the computer has. Source:
Question: What is the advantage of Base-Limit Registers in comparison to PIC and Relocation?

Answer: Guarantees Security:

1. Compares every program-generated address with the limit register and generates an exception if the limit is exceeded.

2. Allows the base and limit registers to be modified only in KERNEL mode. Source:
Question: What is the use of ROWS option in IMP command ?

Answer: A flag to indicate whether rows should be imported. If this is set to 'N' then only DDL for database objects will be executed. Source:
Question: What is the use of INDEXES option in IMP command ?

Answer: A flag to indicate whether import should import index on tables or not. Source:
Question: What is the use of INCTYPE option in EXP command ?

Answer: Type export should be performed COMPLETE,CUMULATIVE,INCREMENTAL. Source:
Question: What is the OPTIMAL parameter?

Answer: It is used to set the optimal length of a rollback segment. Source:
Question: List the Optional Flexible Architecture (OFA) of Oracle database

Question: What is the use of CONSTRAINTS option in EXP command ?

Answer: A flag to indicate whether constraints on table need to be exported. 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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