What is Data Entity Set ?

What is Data Entity Set ?
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1 Answer

Answer :

The sum of one or more data NTT sets is called NTT set.
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Which of the following statements is FALSE about weak entity set ? (A) Weak entities can be deleted automatically when their strong entity is deleted. (B) Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity. (C) A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included. (D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

Description : Which of the following statements is FALSE about weak entity set ? (A) Weak entities can be deleted automatically when their strong entity is deleted. (B) Weak entity set avoids the data ... weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

Last Answer : (D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

Which of the following provides the best description of an entity type? (A) A specific concrete object with a defined set of processes (e.g. Jatin with diabetes) (B) A value given to a particular attribute (e.g. height-230 cm) (C) A thing that we wish to collect data about zero or more, possibly real world examples of it may exist. (D) A template for a group of things with the same set of characteristics that may exist in the real world

Description : Which of the following provides the best description of an entity type? (A) A specific concrete object with a defined set of processes (e.g. Jatin with diabetes) (B) A value given to a ... template for a group of things with the same set of characteristics that may exist in the real world

Last Answer : Answer: D

What is Weak Entity set?

Description : What is Weak Entity set?

Last Answer : An entity set may not have sufficient attributes to form a primary key, and its primary key compromises of its partial key and primary key of its parent entity, then it is said to be Weak Entity set.

What is an Entity set?

Description : What is an Entity set?

Last Answer : It is a collection of all entities of particular entity type in the database.

What kind of mechanism is to be taken into account for converting a weak entity set into strong entity set in entity-relationship diagram ? (A) Generalization (B) Aggregation (C) Specialization (D) Adding suitable attributes

Description : What kind of mechanism is to be taken into account for converting a weak entity set into strong entity set in entity-relationship diagram ? (A) Generalization (B) Aggregation (C) Specialization (D) Adding suitable attributes

Last Answer : (D) Adding suitable attributes

For a weak entity set to be meaningful, it must be associated with another entity set in combination with some of their attribute values, is called as : (A) Neighbour Set (B) Strong Entity Set (C) Owner entity set (D) Weak Set

Description : For a weak entity set to be meaningful, it must be associated with another entity set in combination with some of their attribute values, is called as : (A) Neighbour Set (B) Strong Entity Set (C) Owner entity set (D) Weak Set

Last Answer : (C) Owner entity set 

Consider the following Entity-Relationship (E-R) diagram and three possible relationship sets (I, II and III) for this E-R diagram: Image If different symbols stand for different values (e.g., t1 is definitely not equal to t2), then which of the above could not be the relationship set for the E-R diagram ? (A) I only (B) I and II only (C) II only (D) I, II and III

Description : Consider the following Entity-Relationship (E-R) diagram and three possible relationship sets (I, II and III) for this E-R diagram: If different symbols stand for different values (e.g., t1 is definitely not equal to t2 ... diagram ? (A) I only (B) I and II only (C) II only (D) I, II and III

Last Answer : (A) I only

A data cannot flow between a store and i) a store ii) a process iii) an external entity A) i and iii B) i and ii C) ii and iii D) ii

Description : A data cannot flow between a store and i) a store ii) a process iii) an external entity A) i and iii B) i and ii C) ii and iii D) ii

Last Answer : A) i and iii

A rectangle in a DFD represents A) a process B) a data store C) an external entity D) an input unit

Description : A rectangle in a DFD represents A) a process B) a data store C) an external entity D) an input unit

Last Answer : C) an external entity

A data flow can A) Only emanate from an external entity B) Only terminate in an external entity C) May emanate and terminate in an external entity D) May either emanate or terminate in an external entity but not both

Description : A data flow can A) Only emanate from an external entity B) Only terminate in an external entity C) May emanate and terminate in an external entity D) May either emanate or terminate in an external entity but not both

Last Answer : C) May emanate and terminate in an external entity

Which if the following is not the type of data integrity. A) Key integrity B) Domain integrity C) Entity integrity D) Referential integrity

Description : Which if the following is not the type of data integrity. A) Key integrity B) Domain integrity C) Entity integrity D) Referential integrity

Last Answer : A) Key integrity

The one guideline to be followed while designing the database is A) A database design may be ambiguous. B) Unrelated data should be in the same table so that updating the data will be easy. C) It should avoid/reduce the redundancy. D) An entity should not have attributes.

Description : The one guideline to be followed while designing the database is A) A database design may be ambiguous. B) Unrelated data should be in the same table so that updating the data will be easy. C) It should avoid/reduce the redundancy. D) An entity should not have attributes.

Last Answer : C) It should avoid/reduce the redundancy.

In an ER model, ……………. is described in the database by storing its data. A) Entity B) Attribute C) Relationship D) Notation

Description : In an ER model, ……………. is described in the database by storing its data. A) Entity B) Attribute C) Relationship D) Notation

Last Answer : A) Entity

An ER Model includes I. An ER diagram portraying entity types. II. Attributes for each entity type III. Relationships among entity types. IV. Semantic integrity constraints that reflects the business rules about data not captured in the ER diagram. (A) I, II, III & IV (B) I&IV (C) I, II & IV (D) I & III

Description : An ER Model includes I. An ER diagram portraying entity types. II. Attributes for each entity type III. Relationships among entity types. IV. Semantic integrity constraints that reflects the business rules about data not ... ; IV (B) I&IV (C) I, II & IV (D) I & III

Last Answer : (A) I, II, III & IV

How many bill payment centers have been set up in the country for paying mobile phone bills ?

Description : How many bill payment centers have been set up in the country for paying mobile phone bills ?

Last Answer : More than thirty thousand bill payment centers have been set up in the country for paying mobile phone bills.

Which function calculates the largest value in a set of numbers in Excel ?

Description : Which function calculates the largest value in a set of numbers in Excel ?

Last Answer : The Max () function calculates the largest value in a set of numbers in Excel.

How many Apple computers did you set up ?

Description : How many Apple computers did you set up ?

Last Answer : In 1973, Steve Jobs , Steve Wozniak and Ronald Owen co-founded Apple Computer.

When did you set foot on CDMA 3G ?

Last Answer : CDMA started 3G in 1999

What is Wireless Data Communication ?

Description : What is Wireless Data Communication ?

Last Answer : Wireless data communication is a common component of mobile computing.

What is the data used in Bioinformatics ? Explain ?

Description : What is the data used in Bioinformatics ? Explain ?

Last Answer : Bioinformatics is a technique used to solve biological problems using applied mathematics , information science , statistics , computers , science , artificial intelligence , chemistry and biochemistry. Basically ... computers , which are used for the discovery and development of new genetic drugs.

Why Fiber Optic Cable is Safe in Data Transport ?

Description : Why Fiber Optic Cable is Safe in Data Transport ?

Last Answer : Optical fiber cable is safe for data transfer. It is a coating made of plastic or other materials , which protects the fiber from moisture , abrasion , sprains and other natural disasters. With ... Due to the high electrical resistance, this cable can be used with high voltage electrical equipment.

What do you mean by data warehouse ?

Description : What do you mean by data warehouse ?

Last Answer : Data Warehouse is a huge database that stores the data needed to analyze historical and current transactions. A data warehouse is a logical collection of data and information that is collected from various operational databases.

Explain when the primary key fields of two data tables need to be the same. ?

Description : Explain when the primary key fields of two data tables need to be the same. ?

Last Answer : Due to the following condition of the relation, the primary key fields of the data tables of the two databases need to be the same to create the relation. 1. The common field must be the primary key ... field size , format etc. should be the same and two tables should be open at the same time.

Memo ”Why is data type used ?

Description : Memo ”Why is data type used ?

Last Answer : Data type ( Memo) is used for descriptive writing or description . 65536 characters (letters , numbers , symbols , dates, etc.) can be written for this field . Usually the do type memo of that field is used for writing comments.

Explain why data encryption is required .

Description : Explain why data encryption is required .

Last Answer : Reasons to use data encryption - If data encryption is done, usually unauthorized persons or organizations cannot use the data. The sender encrypts the data using specific code. When the data reaches the ... that data can be used. In this case, the sender must know the rules of decryption.

What is most used in Data Transfer of Real Time Application ?

Description : What is most used in Data Transfer of Real Time Application ?

Last Answer : Isochronous is more used in Data Transfer of Real Time Application .

What is the Data Transmission Speed of Radio Wave ?

Description : What is the Data Transmission Speed of Radio Wave ?

Last Answer : Radio Wave 's Data Transmission Speed ​​–24 Kbps.

What is Full Duplex Data Transmission Mode ?

Description : What is Full Duplex Data Transmission Mode ?

Last Answer : Full duplex data transmission mode means data can be transferred in both directions and at the same time. This means that the transmitting device and the receiving device can simultaneously send and receive information to each other. Duplex means monster.

What if an information content is published in the form of digital data ?

Description : What if an information content is published in the form of digital data ?

Last Answer : Answer : If any information content is published in the form of digital data, it is called digital content.

How to find out if there is any mistake in data in synchronous transmission system ?

Description : How to find out if there is any mistake in data in synchronous transmission system ?

Last Answer : In a synchronous transmission system, data characters are transmitted in the form of blocks or packets. Each block data sends a header information at the beginning and a tailor information signal at the end. This signal helps to check if there is any mistake in the data.

What are the functions of protocol in data communication ?

Description : What are the functions of protocol in data communication ?

Last Answer : The rules for exchanging data or information that actually exist in the form of software are called protocols. Communication software or protocols perform the following tasks in order to transmit data ... The components of a data transcript system are modem , transmitter , switch , receiver etc.

What is data communication medium ?

Description : What is data communication medium ?

Last Answer : The medium that can be used for data exchange between sender and receiver station is called data communication medium. For example: 1. Cable or its 2. Ordinary telephone line 3. Radio wave 4. Microwave 5. Ground satellite system 6. Infrared etc.

What is the data transmission mode of mobile phone ?

Description : What is the data transmission mode of mobile phone ?

Last Answer : Full duplex in mobile phone data transmission mode. Full duplex transmission allows data to be sent and received at both ends at the same time. In this case, Edge can send and receive data anywhere at the same time. You can talk on both ends of the mobile phone at the same time.

What is data transmission mode in walkie-talkie ?

Description : What is data transmission mode in walkie-talkie ?

Last Answer : Half duplex in data transmission mode in walkie-talkie. The devices used in Half Duplex Maid are capable of both sending and receiving data. Half Duplex Maid has the opportunity to send data from both ... only receive or transmit data at the same time but cannot receive or transmit at the same time.

Which of the following is a collection of collected data ?

Description : Which of the following is a collection of collected data ?

Last Answer : Database is a collection of collected data.

What is data that is organized or presented in a meaningful way called ?

Description : What is data that is organized or presented in a meaningful way called ?

Last Answer : Data that is organized or presented in a meaningful way is called data.

In which memory data is temporarily stored while working on computer ?

Description : In which memory data is temporarily stored while working on computer ?

Last Answer : Data is temporarily stored in RAM (Random Access Memory) while working on the computer .

Which device can tell the difference between data and programs ?

Description : Which device can tell the difference between data and programs ?

Last Answer : Microprocessor devices can distinguish between data and programs.

Where is the copied / copied data from an application stored ?

Description : Where is the copied / copied data from an application stored ?

Last Answer : Copied / copied data from an application is stored on the clipboard.

What is Data Encryption ?

Description : What is Data Encryption ?

Last Answer : The special method by which data can be changed from source to destination before ensuring data security is called data encryption method. Example: The word SAJJAD can be written by encrypting TBKKBE . In ... If TBKKBE is working then you have to decrypt it and understand that it is actually SAJJAD

What is a data organization ?

Description : What is a data organization ?

Last Answer : Answer : A special organization of data useful for processing a database is called a data organization. For example, tables , records , fields , bits , etc. are elements of data organization.

Can unlimited data be used on Pocket Router ?

Description : Can unlimited data be used on Pocket Router ?

Last Answer : Pocket Router is not unlimited. You can use the data that you purchase. You can do the work of pocket router from your smartphone ( via wifi ). No need to buy extra router.

What is file or information or data resource sharing ?

Description : What is file or information or data resource sharing ?

Last Answer : File or Information or Data Resource Share: The network allows access to files or data or information from one computer to another. As a result, all the files or information can be kept in one ... the database management system may share files or data from the database stored on the main server.

What are the components of data communication ?

Description : What are the components of data communication ?

Last Answer : Elements of Data Communication Data or information can be exchanged very well from one place to another in the process of data communication. A data communication system usually consists of five components. The ... destination. Servers , personal computers, etc. are used as destinations.

What is data communication ?

Description : What is data communication ?

Last Answer : We often send and receive data or information from one place to another when needed. Data communication is the process of sending and receiving. That is , the process of transferring data from one computer to ... must deliver data properly. 3. Timelines : The system must deliver data on time.

What is Data Transmission Method ?

Description : What is Data Transmission Method ?

Last Answer : Answer : There are several ways to send data from source to destination. There are two ways of data transmission based on how many bits of data can be sent at a time. ... into three parts based on synchronization. E.g. asynchronous transmission synchronous transmission isacronus transmission.

What is the most common type of data transmission mode ?

Description : What is the most common type of data transmission mode ?

Last Answer : The data transmission mode can be generally divided into three parts. These are: a. Simplex b . Half-Duplex c . Full-Duplex Simplex One-way data flow is called Simplex Maid. In this system, ... can receive data when sending data or send data when receiving data. Examples - telephone , mobile phone.

What is data transmission mode ?

Description : What is data transmission mode ?

Last Answer : The system of data exchange is called data transmission mode. In the case of data communication, the direction of the data is very important. In the case of data transfer during data communication, the direction of data flow is called data transmission mode.

What is Data Warehouse ?

Description : What is Data Warehouse ?

Last Answer : Answer : A data warehouse is a large database that stores the data needed to analyze historical and current transactions.

What is master data ?

Description : What is master data ?

Last Answer : Answer : Master data is the main data that the system uses. For example, Walton Company may have a record for each inventory item. Each record has a field. Such as- item number , item description , ... unit price etc. Master data is permanent data that the system retains for as long as it is needed.