Air Force CDC 2r051 Volume 2
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Questions and Answers
- 1.
Which subsystem process does Integrated Maintenance Data System (IMDS) automate?
- A.
Aircraft status
- B.
Aircraft location
- C.
Aircrew debriefing
- D.
Personnel inprocessing
Correct Answer
C. Aircrew debriefingExplanation
The Integrated Maintenance Data System (IMDS) automates the process of aircrew debriefing. This means that IMDS is responsible for collecting and organizing data related to the debriefing of aircrew members after their flights. It streamlines the process and allows for efficient data management and analysis, ensuring that important information from the debriefing is properly recorded and utilized for maintenance and operational purposes.Rate this question:
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- 2.
What system best describes the operating concept of Integrated Maintenance Data System (IMDS)?
- A.
User-oriented
- B.
Event-oriented
- C.
Database-centered
- D.
Information-centered
Correct Answer
B. Event-orientedExplanation
The operating concept of Integrated Maintenance Data System (IMDS) is best described as event-oriented. This means that the system is designed to focus on capturing and recording specific events or incidents related to maintenance activities. It emphasizes tracking and documenting events such as repairs, inspections, and maintenance schedules, rather than being user-oriented, database-centered, or information-centered.Rate this question:
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- 3.
The database manager must inform users when a batch program is scheduled to be run
- A.
Very long
- B.
In the middle of the day
- C.
By the defense enterprise computing center
- D.
Requiring the Integrated Maintenance Data System (IMDS) online processing to be down
Correct Answer
D. Requiring the Integrated Maintenance Data System (IMDS) online processing to be downExplanation
The correct answer is requiring the Integrated Maintenance Data System (IMDS) online processing to be down. This answer explains that the batch program being run will require the IMDS online processing to be temporarily unavailable. This suggests that users of the database manager should be informed about this scheduled downtime so that they are aware of the potential disruption in accessing the system during that time.Rate this question:
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- 4.
When monitoring computer maintenance as a database manager, your efforts must be directed toward
- A.
Requesting hardware and software
- B.
Updating the capabilities on an as needed basis
- C.
The analysis of unscheduled and scheduled downtime
- D.
Technical maintenance of Integrated Maintenance Data System (IMDS) database equipment
Correct Answer
C. The analysis of unscheduled and scheduled downtimeExplanation
As a database manager responsible for monitoring computer maintenance, it is important to focus on analyzing both unscheduled and scheduled downtime. This involves examining the reasons behind the downtime, whether it is due to hardware or software issues, and identifying ways to minimize and prevent such incidents in the future. By analyzing downtime, database managers can identify patterns, make necessary updates to hardware and software, and ensure that the system is functioning optimally. This helps in maintaining the overall efficiency and reliability of the database system.Rate this question:
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- 5.
Make sure your notification checklist includes the
- A.
Last result of a database verify
- B.
Last result of a delete history run
- C.
User IDs of each user to be notified
- D.
Address and phone number of each user to be notified
Correct Answer
D. Address and phone number of each user to be notifiedExplanation
The correct answer is to include the address and phone number of each user to be notified in the notification checklist. This is important because when notifying users, it is necessary to have their contact information in order to reach out to them effectively. Including their address and phone number ensures that the notification can be sent through multiple channels and increases the chances of reaching the users in a timely manner.Rate this question:
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- 6.
Which utility program requires that the database be down when you run this program?
- A.
NDA500
- B.
Database editor
- C.
Interactive query utility
- D.
Data management utility verifies
Correct Answer
D. Data management utility verifiesExplanation
A data management utility verifies the integrity and consistency of a database by performing various checks and validations. In order to ensure accurate results, it is necessary for the database to be offline or down when running this program. This is because any changes made to the database while it is online could affect the verification process and lead to inaccurate results. Therefore, the data management utility requires the database to be offline before it can be run.Rate this question:
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- 7.
How many days of history does program NFS760 retain on the database?
- A.
92
- B.
102
- C.
No more than 92
- D.
No more than 102
Correct Answer
C. No more than 92Explanation
The program NFS760 retains no more than 92 days of history on the database.Rate this question:
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- 8.
Which program is used to verify program NFS760 runs each week?
- A.
NFS760
- B.
NFS910
- C.
NFSO40
- D.
NFSRU0
Correct Answer
D. NFSRU0Explanation
NFSRU0 is the correct answer because it is the program that is used to verify program NFS760 runs each week.Rate this question:
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- 9.
How many options are there for program NFS7U0?
- A.
2
- B.
3
- C.
4
- D.
5
Correct Answer
B. 3Explanation
There are 3 options for program NFS7U0.Rate this question:
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- 10.
When contacted by supply, which screen does the database manager (DBM) run for an annual Standard Reporting Designator (SRD) reconciliation?
- A.
126
- B.
349
- C.
730
- D.
899
Correct Answer
A. 126Explanation
The correct answer is 126. This suggests that when contacted by supply, the database manager (DBM) runs screen 126 for an annual Standard Reporting Designator (SRD) reconciliation.Rate this question:
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- 11.
Which is an option for off-line processing?
- A.
Creating input text files
- B.
Running a database save
- C.
Updating the audit trail tape
- D.
Memorizing every transaction made
Correct Answer
A. Creating input text filesExplanation
An option for off-line processing is creating input text files. This involves preparing data in a format that can be easily read and processed by a computer system. Input text files can be created offline and then later loaded into the system for processing. This method is commonly used when large amounts of data need to be processed or when data needs to be prepared in advance before being inputted into a system.Rate this question:
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- 12.
The two basic procedures for data recovery are processing
- A.
Pseudo remote and off-line
- B.
Manual remote and off-line
- C.
Pseudo remote and manual remote
- D.
Manual remote and straight-line input
Correct Answer
C. Pseudo remote and manual remoteExplanation
The correct answer is pseudo remote and manual remote. These two procedures are used for data recovery. Pseudo remote refers to a method where the recovery process is done remotely, but not in real-time. It involves accessing a system or device remotely to recover the data. Manual remote, on the other hand, involves physically accessing the system or device to recover the data. Both methods are commonly used to retrieve lost or corrupted data.Rate this question:
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- 13.
Implement pseudo processing when
- A.
Integrated Maintenance Data System (IMDS) will not come back on-line
- B.
IMDS is running slow in transaction interface (TIP) mode
- C.
The system is unavailable for only a short period of time
- D.
The system is unavailable for a long time
Correct Answer
D. The system is unavailable for a long timeExplanation
When the system is unavailable for a long time, it is necessary to implement pseudo processing. Pseudo processing refers to simulating the processing of transactions or data entries without actually performing them in real-time. This allows the system to continue functioning and accepting inputs even when the actual processing is not possible. Pseudo processing can be used as a temporary solution until the system comes back online or the issue causing the unavailability is resolved.Rate this question:
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- 14.
What is the reason for establishing an alternate Integrated Maintenance Data System (IMDS) processing site?
- A.
Uninterrupted batch processing
- B.
Continuous inprocessing of new IMDS users
- C.
Uninterrupted database management operation
- D.
Continuous reporting of reliability and maintainability information system reportable job data documentation
Correct Answer
D. Continuous reporting of reliability and maintainability information system reportable job data documentationExplanation
The reason for establishing an alternate Integrated Maintenance Data System (IMDS) processing site is to ensure continuous reporting of reliability and maintainability information system reportable job data documentation. This means that even if the primary processing site experiences any issues or downtime, the alternate site will be able to continue the reporting process without interruption. This helps to maintain the accuracy and availability of important data and documentation related to reliability and maintainability.Rate this question:
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- 15.
What document is used by the Field Assistance Service to communicate with field agencies?
- A.
System advisory notice (SAN)
- B.
Heads up messages (HUM)
- C.
Printed newsletter
- D.
System release
Correct Answer
B. Heads up messages (HUM)Explanation
The Field Assistance Service uses Heads up messages (HUM) to communicate with field agencies. These messages serve as a way to provide important information or updates to the field agencies in a timely manner. They are likely to contain urgent or time-sensitive information that needs to be communicated quickly and efficiently. The use of HUM allows for effective communication and coordination between the Field Assistance Service and the field agencies.Rate this question:
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- 16.
What does the 754th Electronic Systems Group (ELSG) send out to the field right away if a software problem is discovered but a system advisory notice (SAN) might be delayed?
- A.
Wireless email
- B.
Instant text messaging
- C.
Heads up message (HUM)
- D.
Facsimile message (FAX)
Correct Answer
C. Heads up message (HUM)Explanation
If a software problem is discovered but a system advisory notice (SAN) might be delayed, the 754th Electronic Systems Group (ELSG) sends out a Heads up message (HUM) to the field right away. This allows them to inform the relevant personnel about the issue immediately, even before the SAN is sent. The HUM serves as a quick notification to ensure that the necessary actions can be taken promptly to address the software problem.Rate this question:
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- 17.
For which situation may the user submit an Air Force IMT 3215, C4 Systems Requirements Document regarding Integrated Maintenance Data System (IMDS)?
- A.
Add new capabilities to IMDS
- B.
Change user name and password in IMDS
- C.
Report a problem while using an IMDS screen
- D.
Correct a data entered in error on an IMDS screen
Correct Answer
A. Add new capabilities to IMDSExplanation
The user may submit an Air Force IMT 3215, C4 Systems Requirements Document regarding Integrated Maintenance Data System (IMDS) when they want to add new capabilities to IMDS.Rate this question:
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- 18.
A difficulty report (DIREP) in Integrated Maintenance Data System (IMDS) is used when
- A.
A user has difficulty using IMDS
- B.
IMDS is not operating as designed
- C.
The DBM cannot fix an IMDS problem
- D.
A user wants to make changes to an IMDS program
Correct Answer
B. IMDS is not operating as designedExplanation
The correct answer is IMDS is not operating as designed. This means that a difficulty report (DIREP) in Integrated Maintenance Data System (IMDS) is used when the system is not functioning according to its intended design and there is a need to address and resolve the issue. This could include errors, bugs, or malfunctions in the IMDS software or hardware that need to be reported and fixed.Rate this question:
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- 19.
The responsibility for initializing Interactive Communication Interface (ICI) via screen #891 lies with
- A.
The host data base manager (DBM)
- B.
The system monitor
- C.
Unit level DBMs
- D.
Functional users
Correct Answer
A. The host data base manager (DBM)Explanation
The responsibility for initializing Interactive Communication Interface (ICI) via screen #891 lies with the host database manager (DBM). This means that it is the responsibility of the host DBM to initiate the Interactive Communication Interface through screen #891.Rate this question:
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- 20.
A difficulty report (DIREP) is submitted when the
- A.
Integrated Maintenance Data System functional manager cannot provide a workaround for the problem
- B.
Field assistance branch receives the problem from the database manager
- C.
Database manager calls the Field Assistance Service to submit one
- D.
Defense Enterprise Computing Center approves the submission
Correct Answer
A. Integrated Maintenance Data System functional manager cannot provide a workaround for the problemExplanation
When the Integrated Maintenance Data System functional manager is unable to provide a workaround for the problem, a difficulty report (DIREP) is submitted. This suggests that the functional manager has exhausted all possible solutions or alternatives to address the problem, leading to the need for a formal report to document the issue and seek further assistance or resolution.Rate this question:
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- 21.
Which Reliability and Maintainability Information System (REMIS) interface program reschedules REMIS inventory reconciliations?
- A.
REMIS table load
- B.
REMIS error inquiry
- C.
REMIS error correction menu
- D.
Defense Data Network (DDN) address record
Correct Answer
D. Defense Data Network (DDN) address recordExplanation
The Defense Data Network (DDN) address record is the correct answer because it is the interface program in the Reliability and Maintainability Information System (REMIS) that reschedules REMIS inventory reconciliations. This program is responsible for managing and updating the DDN address records, which are essential for maintaining the accuracy and reliability of the REMIS inventory system.Rate this question:
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- 22.
Which Reliability and Maintainability Information System (REMIS) interface program provides a list of all files which have been received from or transmitted to REMIS within the last 72 hours?
- A.
Defense Data Network (DDN) Address Record
- B.
Table Validation Problem Reporting
- C.
Debriefing MOA Builder
- D.
REMIS Error Inquiry
Correct Answer
A. Defense Data Network (DDN) Address RecordExplanation
The Defense Data Network (DDN) Address Record interface program provides a list of all files that have been received from or transmitted to REMIS within the last 72 hours. This program is specifically designed to track and manage the communication between REMIS and other systems, ensuring the reliability and maintainability of the information being transmitted. By using the DDN Address Record interface program, users can easily monitor the flow of files and identify any potential issues or errors that may have occurred during the transmission process.Rate this question:
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- 23.
Which option on the G081 Session Selection menu brings up the G081 Time Sharing Option (TSO) menu?
- A.
ATAIMTI1 TDSC –IMSC Development
- B.
IMSA CAMS (G081) Production
- C.
IMSB CAMS (G081) Test
- D.
ATATS TSO
Correct Answer
D. ATATS TSOExplanation
The option "ATATS TSO" on the G081 Session Selection menu brings up the G081 Time Sharing Option (TSO) menu.Rate this question:
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- 24.
In G081, when you see three asterisks (*) in a row, it means you need to press
- A.
Enter to logoff G081
- B.
Escape to continue
- C.
Enter to continue
- D.
F1 to continue
Correct Answer
C. Enter to continueExplanation
In G081, the three asterisks (*) in a row indicate that the user needs to press the "enter" key to continue. This is the correct answer because the question specifically mentions the meaning of three asterisks, and the given options include "enter to continue" as one of the choices.Rate this question:
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- 25.
Which option would you select on the Time Sharing Option (TSO) Primary Option Menu in order to start the G081 User ID Maintenance Facility?
- A.
Option 6 Command
- B.
Option S Security
- C.
Option 3 Utilities
- D.
Option SD SDSF
Correct Answer
B. Option S SecurityExplanation
To start the G081 User ID Maintenance Facility on the Time Sharing Option (TSO) Primary Option Menu, you would select Option S Security. This option is chosen because the User ID Maintenance Facility is related to security functions, such as creating, modifying, and deleting user IDs, and managing user access rights and permissions.Rate this question:
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- 26.
In addition to creating a new G081 User ID in the G081 User ID Maintenance Facility, which program must the G081 manager process in order to grant access to G081?
- A.
F9057, Terminal/User Master Record Update
- B.
F9077A, 8033/User Master Record Update
- C.
F9007, Work Center Update
- D.
F0045, Shop Updates
Correct Answer
A. F9057, Terminal/User Master Record UpdateExplanation
The G081 manager must process the F9057 program, Terminal/User Master Record Update, in order to grant access to G081. This program is responsible for updating the terminal and user master records, which are necessary for granting access to the G081 system. Processing this program ensures that the necessary updates are made to the user IDs and terminals, allowing users to access G081.Rate this question:
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- 27.
Which option of the virtual telecommunications access method (VTAM) Printing System Virtual Machine Communications Facility (VMCF) F Printer Selection List is used to access a particular printer’s command page?
- A.
Option H
- B.
Option Q
- C.
Option C
- D.
Option D
Correct Answer
C. Option CExplanation
Option C of the VTAM Printing System VMCF F Printer Selection List is used to access a particular printer's command page.Rate this question:
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- 28.
As the result of an aircraft mishap, an Integrated Maintenance Data System (IMDS) database save tape expiration date is changed to
- A.
14 days
- B.
1 month
- C.
6 months
- D.
1 year
Correct Answer
D. 1 yearExplanation
The correct answer is "1 year" because the expiration date of the Integrated Maintenance Data System (IMDS) database save tape is changed to 1 year after the aircraft mishap. This means that the database save tape will remain valid and usable for a period of 1 year before it needs to be replaced or renewed.Rate this question:
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- 29.
What must you immediately do in G081 if there is an aircraft mishap?
- A.
Run history reports
- B.
Run a database save
- C.
Secure the database
- D.
Secure the aircraft records
Correct Answer
D. Secure the aircraft recordsExplanation
In the event of an aircraft mishap in G081, the immediate action that must be taken is to secure the aircraft records. This is important to ensure that all relevant information and data regarding the aircraft are protected and preserved for further investigation and analysis. By securing the aircraft records, it helps to maintain the integrity of the information and prevents any unauthorized access or tampering, which could potentially hinder the investigation process.Rate this question:
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- 30.
What type(s) of database system(s) compose the Integrated Maintenance Data System (IMDS) central database?
- A.
Network only
- B.
Relational only
- C.
Network and relational
- D.
Network and non-networked
Correct Answer
C. Network and relationalExplanation
The Integrated Maintenance Data System (IMDS) central database is composed of both network and relational database systems. This means that the database utilizes both the network model for organizing and structuring data as well as the relational model for managing relationships between different data tables. This combination allows for efficient storage, retrieval, and manipulation of data within the IMDS system.Rate this question:
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- 31.
The most distinguishing characteristic of a relational query language, like Structured Query Language (SQL), is
- A.
Its non-procedural language
- B.
It’s the oldest retrieval language
- C.
The use of a complex data language
- D.
The use of an exact procedural language
Correct Answer
A. Its non-procedural languageExplanation
The most distinguishing characteristic of a relational query language like SQL is its non-procedural language. This means that in SQL, the user specifies what data they want to retrieve or manipulate, rather than specifying how to retrieve or manipulate it. In other words, the user focuses on the desired outcome, and the database management system takes care of the actual steps or procedures to achieve that outcome. This non-procedural approach allows for greater flexibility and simplicity in querying and manipulating data.Rate this question:
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- 32.
Within the Relational Database Management System (RDMS) section of the central database (CDB), reference tables that include equipment and aircraft are provided by
- A.
General-purpose records
- B.
Transactional data from enterprise location code (ELC)
- C.
Traditional legacy Core Automated Maintenance system (CAMS) data
- D.
Data from Reliability and Maintainability Information System (REMIS)
Correct Answer
D. Data from Reliability and Maintainability Information System (REMIS) -
- 33.
What does the schema of a database describe?
- A.
The user of the database
- B.
The location of the database
- C.
Physical relationships between every type of area
- D.
Physical layout of records and logical relationships between records
Correct Answer
D. Physical layout of records and logical relationships between recordsExplanation
The schema of a database describes the physical layout of records and the logical relationships between records. This means that it outlines how the data is organized and stored within the database, including the structure of tables, fields, and relationships between them. The schema defines the framework for data storage and retrieval, allowing users to understand how the data is structured and how different pieces of information relate to each other. It does not describe the user of the database or the location of the database.Rate this question:
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- 34.
Which element under the area section of the Integrated Maintenance Data System (IMDS) schema indicates how much space is left over?
- A.
Load
- B.
Allocate
- C.
Area Size
- D.
Area Maps
Correct Answer
A. LoadExplanation
The element "Load" under the area section of the Integrated Maintenance Data System (IMDS) schema indicates how much space is left over. It suggests that the system is currently loaded with certain data or information, and by analyzing the load, one can determine how much space is still available in the system.Rate this question:
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- 35.
How many base level areas does the enterprise location code (ELC) database have?
- A.
10
- B.
11
- C.
12
- D.
13
Correct Answer
B. 11Explanation
The enterprise location code (ELC) database has 11 base level areas.Rate this question:
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- 36.
Which clause in the record section of the Integrated Maintenance Data System (IMDS) schema defines the areas where the records can be found?
- A.
Record code
- B.
Record name
- C.
Data identifier
- D.
Location mode
Correct Answer
C. Data identifierExplanation
The data identifier clause in the record section of the Integrated Maintenance Data System (IMDS) schema defines the areas where the records can be found. This clause provides a unique identifier for each record, allowing users to easily locate and access specific records within the system. The data identifier serves as a reference point for organizing and retrieving records based on their assigned identifier.Rate this question:
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- 37.
Record placement in the Integrated Maintenance Data System (IMDS) database depends on association, distribution, and
- A.
Data
- B.
Volatility
- C.
Page size
- D.
Relationship
Correct Answer
B. VolatilityExplanation
The correct answer is "volatility". In the context of the Integrated Maintenance Data System (IMDS) database, record placement depends on the volatility of the data. Volatility refers to how frequently the data in the database changes or is updated. If the data is volatile, it may require more frequent placement or redistribution within the database to optimize performance and access.Rate this question:
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- 38.
Within Integrated Maintenance Data System (IMDS), a direct type of record has its database key assigned and controlled by the
- A.
Host database manager
- B.
Combat Systems Support Help Desk
- C.
Major Command (MAJCOM) database manager
- D.
Electronic Systems Group (ELSG) database administrator
Correct Answer
D. Electronic Systems Group (ELSG) database administratorExplanation
The correct answer is Electronic Systems Group (ELSG) database administrator. Within the Integrated Maintenance Data System (IMDS), a direct type of record has its database key assigned and controlled by the ELSG database administrator.Rate this question:
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- 39.
Which type of records comprise a majority of the Integrated Maintenance Data System (IMDS) database?
- A.
Special
- B.
Via Set
- C.
Placement
- D.
Relationship
Correct Answer
B. Via SetExplanation
The majority of the Integrated Maintenance Data System (IMDS) database is comprised of "Via Set" records.Rate this question:
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- 40.
You can access via set records normally through
- A.
An entry point record and an owner record
- B.
Key data items in the record
- C.
A database pointer
- D.
A database key
Correct Answer
A. An entry point record and an owner recordExplanation
An entry point record and an owner record are used to access set records normally. The entry point record serves as the starting point for accessing the set records, while the owner record provides information about the set and its relationship to other records. By using these two records, one can navigate through the set records and retrieve the desired information.Rate this question:
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- 41.
What types of records are defined when a hierarchical relationship is established by sets?
- A.
Via Set
- B.
Relationship
- C.
CALC and Direct
- D.
Owner and member
Correct Answer
D. Owner and memberExplanation
When a hierarchical relationship is established by sets, the types of records that are defined are "Owner" and "member". In this context, the "Owner" record represents the higher-level entity or set, while the "member" record represents the lower-level entity or set that is associated with the owner. This relationship allows for the organization and representation of data in a hierarchical structure, where each owner can have multiple members.Rate this question:
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- 42.
Which type of linkage would be present when the owner record points to the first member record, the first member record points to the next member, and the last member points back to the owner?
- A.
Prior
- B.
Relationship
- C.
One-way circular
- D.
Two-way circular
Correct Answer
C. One-way circularExplanation
In a one-way circular linkage, the owner record points to the first member record, the first member record points to the next member, and the last member points back to the owner. This creates a circular chain where each member is linked to the next one, forming a one-way flow. This type of linkage allows for efficient traversal of the records in a specific order, starting from the owner and following the chain of members.Rate this question:
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- 43.
What clause in the set section determines the logical placement of a new member record added to a set?
- A.
Code
- B.
Mode
- C.
Order
- D.
Set selection
Correct Answer
C. OrderExplanation
The clause "Order" in the set section determines the logical placement of a new member record added to a set. This means that the new member record will be placed in a specific order within the set, based on the value specified in the "Order" clause.Rate this question:
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- 44.
Which element of the database structure is not shown by the Integrated Maintenance Data System (IMDS) Data Management System (DMS) schematic?
- A.
Set
- B.
Area
- C.
Page
- D.
Record
Correct Answer
C. PageExplanation
The Integrated Maintenance Data System (IMDS) Data Management System (DMS) schematic does not show the element of "Page" in the database structure.Rate this question:
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- 45.
When reading an Integrated Maintenance Data System (IMDS) Data Management System (DMS) schematic, an off-page connector from another area is identified by an arrow pointing
- A.
To a circled number from a record
- B.
From a circled number to a record
- C.
To a boxed number from a record
- D.
From a boxed number to a record
Correct Answer
B. From a circled number to a recordExplanation
In an Integrated Maintenance Data System (IMDS) Data Management System (DMS) schematic, an off-page connector from another area is identified by an arrow pointing from a circled number to a record. This means that the circled number represents the off-page connector, indicating that the record is located on another page or in another area. The arrow shows the direction of the connection, from the circled number to the record. This helps in understanding the flow of information and connections between different parts of the schematic.Rate this question:
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- 46.
When viewing the rectangle box on an Integrated Maintenance Data System (IMDS) schematic, the area consisting of one schematic page is denoted by
- A.
A whole number
- B.
A first digit of the set number
- C.
The first digit of the area code
- D.
The Transaction Interface Package (TIP) number
Correct Answer
A. A whole numberExplanation
The correct answer is a whole number. This means that the area consisting of one schematic page is represented by a complete number, without any fractions or decimals.Rate this question:
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- 47.
What is the first step in building an effective data model?
- A.
Schema design
- B.
Adding key attributes to the model
- C.
Planning and requirements analysis
- D.
Adding non-key attributes to the model
Correct Answer
C. Planning and requirements analysisExplanation
The first step in building an effective data model is planning and requirements analysis. This involves understanding the needs and objectives of the project, gathering and documenting the requirements, and identifying the scope and constraints of the data model. This step helps in determining the purpose and goals of the data model, and lays the foundation for the subsequent steps of schema design and adding attributes to the model. By conducting thorough planning and requirements analysis, the data model can be tailored to meet the specific needs of the project and ensure its effectiveness.Rate this question:
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- 48.
A column or combination of columns in a relational table that uniquely identifies a row is called a
- A.
Key
- B.
Null
- C.
Index
- D.
Record
Correct Answer
A. KeyExplanation
A key in a relational table is a column or combination of columns that uniquely identifies a row. It is used to ensure the uniqueness of each row in the table and to establish relationships between tables. Keys can be primary keys, which uniquely identify each row in a table, or they can be foreign keys, which establish a relationship between two tables. In this context, the correct answer is "key".Rate this question:
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- 49.
In a relational database,
- A.
Two tables can have exactly the same name within the same database
- B.
The column selected as the primary key field may not be null
- C.
Each row can have more than one value for each column
- D.
A row can be duplicated in a table
Correct Answer
B. The column selected as the primary key field may not be nullExplanation
In a relational database, the primary key field is a unique identifier for each row in a table. It ensures that each row has a distinct identity and cannot be null. This means that the column selected as the primary key field cannot have missing or null values.Rate this question:
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- 50.
What type of key establishes the relationship with records in one table to records in another table?
- A.
Table Key
- B.
Foreign Key
- C.
Primary Key
- D.
Relational Key
Correct Answer
B. Foreign KeyExplanation
A foreign key is a type of key that establishes the relationship between records in one table to records in another table. It is used to link the primary key of one table to the foreign key of another table, creating a relationship between the two tables. This allows for data integrity and ensures that the relationship between the tables is maintained.Rate this question:
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Dec 14, 2023Quiz Edited by
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Sep 25, 2013Quiz Created by
Jhomsey
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