Data organization involves characters , fields, records, files and so on. This concept is a starting point when trying to see what makes up data and whether data has a structure. Also Know, is the highest level of data hierarchy?
The highest level in the hierarchy of data organization is called database. A database is a collection of all tables which contains the data in form of fields. Data hierarchy refers to the systematic organization of data , often in a hierarchical form.
The six components of data hierarchy are bit, byte , field , record, file , and database. A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links.
A record is a collection of fields, with each field containing only one value. Business data can be organized in logical hierarchy. There are three levels in the data hierarchy. These levels include attribute, record and file. What are some examples of hierarchy? The definition of hierarchy is a group of people or things arranged in order of rank or the people that rank at the top of such a system.
Hirarki Stuktur Basis Data. Basis data adalah kumpulan file-file yang mempunyai kaitan antara satu file dengan file lain sehingga membentuk suatu bangunan data untuk menginformasikan suatu perusahaan atau instansi dalam batasan tertentu. File adalah kumpulan berbagai informasi yang berhubungan dan juga tersimpan di dalam secondary storage, secara konsep file memiliki beberapa tipe ada yang bertipe Data terdiri dari numeric, character dan binary. Lalu ada juga file yang bertipe program.
Atau Definisi file adalah arsip ataupun data yang tersimpan di dalam komputer. File di komputer pada umumnya disimpan di dalam suatu folder tertentu tergantung si pemilik komputer tersebut ingin dimana ia menyimpannya, setiap file memiliki ekstensi masing-masing tergantung jenis file itu sendiri. Ekstensi file adalah sebagai tanda yang membedakan jenis-jenis dari file. D an entity done clear. A Primary key done clear. B Unique done clear.
C Null done clear. D Foreign key done clear. A office automation done clear. B database management problems done clear. C scientific problems done clear. D calculations only done clear. A dBASE done clear. B FoxPro done clear. C Oracle done clear.
D SyBase done clear. E Database done clear. B object done clear. C unique done clear. A two levels done clear. B four levels done clear. C three levels done clear. D one level done clear. A rectangle done clear.
B square done clear. C ellipse done clear. D triangle done clear. E circle done clear. A not null done clear. B null done clear. C Both a and b done clear. D any value done clear. B ellipse done clear. C diamond box done clear. D circle done clear.
A data is dependent on programs done clear. B data redundancy increases done clear. C data is integrated and can be accessed by multiple programs done clear. A data independence done clear. B centralised control of data done clear. C selection of data done clear.
D Both a and b done clear. A attribute done clear. B degree done clear. C tuple done clear. D domain done clear. A Network Database done clear. B Hierarchical Database done clear. C Relational Database done clear. D Multiple Database done clear. A QBE done clear. B SQL done clear.
C OLAP done clear. D Sequel Server done clear. A Backup done clear. B Recovery done clear. C Redundancy done clear. D Security done clear. A number of database done clear. B number of columns done clear. C number of rows done clear. D number of tables done clear. A cell done clear. B field done clear. C record done clear. D query done clear. A Data redundancy done clear. B Data integrity done clear. C Data reliability done clear. D Data consistency done clear.
A Query done clear. B Form done clear. C Record done clear. D Table done clear. A front end done clear. B repository done clear. C back end done clear. D form done clear.
A rows and columns done clear. B blocks done clear. C tracks and sectors done clear. A to be responsible for the technical aspects of managing the information contained in organizational databases done clear.
B to be responsible for the executive level aspects of decision regarding the information management done clear. C to show the relationship among entity classes in a data warehouse done clear. D to define which data mining tools must be used to extract data done clear. A primary key done clear. B secondary key done clear.
C foreign key done clear. D composite key done clear. A character done clear. D record done clear. A is the entire database done clear. B is a standard way of organising information into accessable part done clear.
C describes how data is actually stored on disk done clear. A number of tuples done clear. B number of attributes done clear.
A Row b. A Table c. A Field d. A Column Answer: a. A Row Column header is refer as a. Table b. Relation c. Attributes d. Domain Answer: c. Attributes Which of the following is not Modification of the Database? Deletion b. Insertion c. Sorting d. Updating Answer: c. Sorting Which of the following in true regarding Null Value? Offline database connection b. Oriented database connection c.
Open database connection d. None of the above Answer: c. Open database connection Data security b. Data integrity c. Data constraint d. Data independence Data integrity constraints are used to: a. Control who is allowed access to the data b. Ensure that duplicate records are not entered into the table c. Improve the quality of data entered for a specific property i. Prevent users from changing the values stored in the table Answer: c.
Database application and the database b. Data and the database c. The user and the database application Answer: a. Database application and the database 1. Which of the following is not a level of data abstraction?
Physical Level b. Critical Level c. Logical Level d. View Level Answer: b. Critical Level 2. Which of the following is not an Schema? Database Schema b. Physical Schema c. Critical Schema d. Logical Schema Answer: c. Critical Schema 3. Which of the following is a Data Model?
Entity-Relationship model b. Relational data model c. Object-Based data model d. All of the above 4. Logical design of database is called a. Database Instance b. Database Snapshot c. Database Schema d.
All of the above Answer: c. Database Schema 5. Snapshot of the dta in the database at a given instant of time is called a. Database Instance c. Database Snapshot d. All of the above Answer: b. Database Instance 6. Which of the following is the structure of the Database?
Schema c. Relation d. None of these Answer: b. Schema 7. A logical description of some portion of database that is required by a user to perform task is called as a. System View b. User View c. Logical View d. Data View Answer: b. User View 8.
Left — Right approach b. Right — Left approach c. Top — Down approach d. Bottom — Up approach Answer: c. Top — Down approach 9. Which of the following is the oldest database model? Relational b. Hierarchical c. Physical d. Network Answer: d. Network Minimum cardinality b. Maximum cardinality c. ERD d. Maximum cardinality A domain constraint b.
A range constraint c. An intrarelation constraint d. An interrelation constraint Answer: a. A domain constraint In a 1:N relationship, the foreign key is placed in: a.
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