What is a write-ahead log (WAL) in crash recovery?

a) A log file that records changes before they are applied to the database

b) A backup file created after a crash

c) A tool to analyze crash reports

d) A software feature to prevent crashes from happening

What does ARIES stand for?

Algorithm for Recovery and Isolation Exploiting Semantics

Algorithm for Restoring Integrity and Ensuring Security

Advanced Recovery and Isolation for Efficient Systems

Automated Recovery and Isolation for Enhanced Security

What does the term 'atomicity' refer to in crash recovery?

The property that ensures all operations of a transaction are executed or none are

The ability to recover from hardware failures

The speed of the recovery process

The method of logging changes to the database

What is the role of a transaction log?

To record changes to the database and ensure ACID properties

To create backups of the database

What does durability guarantee in the context of transactions?

Transactions that have committed will survive permanently

Transactions will be executed quickly

Transactions can be modified after they are committed

Transactions can be rolled back at any time

What is the purpose of checkpointing in a database?

To create a snapshot of the database state

To increase database performance

What does the term 'point of consistency' refer to?

The state of the database after a crash recovery

The state of the database before any transactions

The state of the database when it is first created

The state of the database when all transactions are committed

What is the advantage of using a parallel database system in a large retail store?

Enhanced inventory management flexibility

Improved customer service availability

In shared-nothing architecture, each CPU has its own copy of

portion of data managed by the DBMS

Importance of distributed and parallel database include all except

Improve reliability and availability

Data replication is a

technique that permits storage of certain data in more than one site

technique of breaking up the database into logical units, which may be assigned for storage at the various sites

process of deciding about locating (or placing) data to several sites

Which of the following defines a heterogeneous distributed database?

Different DBMS is used at each location and data are distributed across all nodes

Same DBMS is used at each location but data are not distributed across all nodes

Same DBMS is used at each location with data distributed across all nodes

Different DBMS is used at each location and data are not distributed across all nodes

In a university setting, what does an autonomous homogeneous distributed database environment resemble?

Each department has the same database management system (DBMS) and operates independently

Each department has the same DBMS and a central DBMS coordinates database access

Each department has a different DBMS and operates independently

Each department has a different DBMS and a central DBMS coordinates database access

In a university setting, what does an autonomous homogeneous distributed database environment resemble?

Each department has the same database management system (DBMS) and operates independently

Each department has the same DBMS and a central DBMS coordinates database access

Each department has a different DBMS and operates independently

Each department has a different DBMS and a central DBMS coordinates database access

Emma is managing a large online retail store that experiences high traffic during sales events. To ensure that the database can handle multiple transactions simultaneously and improve performance, she decides to implement a new system. What type of database should Emma choose?

A parallel database is a database that uses multiple processors to perform operations simultaneously for improved performance.

A parallel database is a database that only stores unstructured data.

A parallel database is a type of cloud storage service.

A parallel database is a single processor database for faster access.

In a busy restaurant kitchen, multiple chefs are working together to prepare meals efficiently. Explain how the shared memory architecture in parallel databases is similar to their collaboration.

Shared memory architecture enables multiple processors to access a common memory space for efficient data sharing and communication in parallel databases.

Shared memory architecture requires a dedicated memory for each processor.

In shared memory architecture, data is only accessible by a single processor at a time.

Shared memory architecture is primarily used for disk storage management.

In a tech company, William is tasked with managing the company's data storage solutions. He learns about different types of databases and comes across the concept of distributed databases. What are distributed databases?

Distributed databases are databases that are spread across multiple locations or nodes, allowing for improved availability, fault tolerance, and scalability.

Databases that only exist on a single server

Databases that are only used for temporary storage

Databases that do not allow for data replication

In a large online retail company, multiple servers are used to handle customer orders and inventory data. What is the role of data replication in their distributed databases?

Data replication improves availability, fault tolerance, and performance in distributed databases.

Data replication is only used for backup purposes in distributed databases.

Data replication reduces data consistency in distributed databases.

Data replication eliminates the need for network communication in distributed databases.

Year 11 DP CAT 2 CBT Third Term

Authored by Joseph Ighosiohwonoja

Computers

11th Grade

Used 1+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

___ is the process of moving back the database to a consistent state after a crash?

Crash Recovery

Crash Transfer

Crash Survival

Database Security

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

is a history of actions executed by a database management system

Check pointing

Log

Encryption

DBMS

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

___ involves taking periodic record of the database state

Media recovery

Logging

Check pointing

Fragmentation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

the process of retracing the actions of a database before the crash and bringing the system back to the exact state that it was in before the crash is called ____

Logging history during redo

Repeating history during undo

Logging changes during undo

Repeating history during redo

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Any change to an object is first recorded in the log.
What principle of ARIES is this?

Analysis principle

Logging changes during undo

Write ahead Logging

Execution principle

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is crash recovery in the context of computer systems?

Restoring a crashed system to its previous state

Recovering data from a crashed hard drive

Restarting the computer after a crash

Repairing damaged system files

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a transaction in the context of crash recovery?

a) A system backup process

b) A failed computer component

c) An atomic unit of work that must be completed as a whole

d) A type of software update

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Year 11 DP CAT 2 CBT Third Term

___ is the process of moving back the database to a consistent state after a crash?

is a history of actions executed by a database management system

___ involves taking periodic record of the database state

the process of retracing the actions of a database before the crash and bringing the system back to the exact state that it was in before the crash is called ____

Any change to an object is first recorded in the log. What principle of ARIES is this?

What is crash recovery in the context of computer systems?

What is a transaction in the context of crash recovery?

What is a write-ahead log (WAL) in crash recovery?

Which of the following is a recovery procedure used in the ARIES algorithm to achieve crash recovery?

What does ARIES stand for?

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Any change to an object is first recorded in the log.
What principle of ARIES is this?