INF503 Week 5 Quize's

Started on	Sunday, February 13, 2022, 11:16 PM
State	Finished
Completed on	Sunday, February 13, 2022, 11:19 PM
Time taken	3 mins 9 secs
Grade	20.00 out of 20.00 (100%)

Question 1

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_____ can render data useless to unauthorized users who might have violated some of the database security layers.

Select one:

Data encryption

Correct

Access rights

Physical security

Password security

Feedback

The correct answer is: Data encryption

Question 2

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_____ are required to prevent another transaction form reading inconsistent data.

Select one:

Locks

Correct

Schedules

Logs

Stamps

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The correct answer is: Locks

Question 3

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_____ means that data used during the execution of a transaction cannot be used by a second transaction until the first one is completed.

Select one:

Time stamping

Serializability

Isolation

Correct

Atomicity

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The correct answer is: Isolation

Question 4

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_____ occurs when a transaction accesses data before and after one or more other transactions finish working with such data.

Select one:

Inconsistent retrieval

Correct

Dirty read problems

The phenomena of uncommitted data

Lost update problems

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The correct answer is: Inconsistent retrieval

Question 5

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_____ requires that all operations of a transaction be completed.

Select one:

Durability

Specificity

Time stamping

Atomicity

Correct

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The correct answer is: Atomicity

Question 6

Correct

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A _____ lock allows concurrent transactions to access different rows of the same table.

Select one:

database table

row-level

Correct

page-level

table-level

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The correct answer is: row-level

Question 7

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A _____ lock will lock the entire diskpage.

Select one:

page-level

Correct

table-level

row-level

transaction-level

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The correct answer is: page-level

Question 8

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A _____ lock will lock the entire table, preventing access to any row by a transaction while another transaction is using the table.

Select one:

database-level

row-level

page-level

table-level

Correct

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The correct answer is: table-level

Question 9

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Question text

A consistent database state is one in which all _____.

Select one:

SQL statements only update one table at a time

data integrity constraints are satisfied

Correct

table are normalized

tables have foreign keys

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The correct answer is: data integrity constraints are satisfied

Question 10

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A diskpage, or page, is the equivalent of a _____.

Select one:

diskblock

Correct

disk sector

database schema

database table

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The correct answer is: diskblock

Question 11

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A single-user database system automatically ensures_____ of the database, because only one transaction is executed at a time.

Select one:

serializability and isolation

Correct

serializability and durability

atomicity and isolation

atomicity and serializability

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The correct answer is: serializability and isolation

Question 12

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_____ is a technique that creates logical representations of computing resources that are independent of the underlying physical computing resources.

Select one:

Generalization

Normalization

Specialization

Virtualization

Correct

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The correct answer is: Virtualization

Question 13

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_____ is the process of determining the data storage organization and data access characteristics of the database to ensure its integrity, security, and performance.

Select one:

Network design

Logical design

Conceptual design

Physical design

Correct

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The correct answer is: Physical design

Question 14

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"Should the existing system be replaced?" is a question that is asked during the _____ stage of the Systems Development Life Cycle (SDLC).

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maintenance

implementation

planning

Correct

analysis

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The correct answer is: planning

Question 15

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"What are the requirements of the current system's end users?" is a question asked during the _____ phase of the Systems Development Life Cycle (SDLC).

Select one:

analysis

Correct

implementation

planning

maintenance

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The correct answer is: analysis

Question 16

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Coding, testing, and debugging are part of the _____ phase of the Systems Development Life Cycle (SDLC).

Select one:

planning

analysis

implementation

Correct

detailed systems design

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The correct answer is: implementation

Question 17

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Discovery of user requirements, existing system evaluation, and logical system design are part of the _____ phase of the Systems Development Life Cycle (SDLC).

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planning

implementation

detailed systems design

analysis

Correct

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The correct answer is: analysis

Question 18

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During decentralized design, after the _____ has been completed, all modules are integrated into one conceptual model.

Select one:

declaration process

verification process

Correct

logical process

conceptual process

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The correct answer is: verification process

Question 19

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During the _____ phase of the Systems Development Life Cycle (SDLC), the hardware, database management system (DBMS) software, and application programs are installed, and the database design is implemented.

Select one:

detailed systems design

analysis

maintenance

implementation

Correct

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The correct answer is: implementation

Question 20

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In a(n) _____, only the objects that have been updated or modified since the last full backup are backed up.

Select one:

conservative backup

differential backup

Correct

transaction log backup

adaptive backup

Feedback

The correct answer is: differential backup

Finish review

Comments

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