What is the smallest data element in a database?
Bit
Bit (Character) – a bit is the smallest unit of data representation (value of a bit may be a 0 or 1).
Which of the following data items are arranged from the smallest to the largest in the data hierarchy?
The data hierarchy, arranged from smallest to largest, is: Byte, bit, field, record, file.
What is field record and table in database?
Record: Record is a collection of values or fields of a specific entity. Eg. An employee, Salary account, etc. Field: A field refers to an area within a record which is reserved for a specific piece of data. … Table: Table is the collection of records of specific types.
What is the hierarchy of data in a database?
Data hierarchy refers to the systematic organization of data, often in a hierarchical form. 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.
Which is the smallest unit of information that a computer handles?
A bit or binary digit is the smallest unit of a computer. All the information in the computer is stored in the form of the bit. The binary digit has the value of either 0 or 1 in most of the computer system , there 8 bits in 1 bit.
Which of the following holds a single piece of data?
SINGLE PIECE OF DATA IS KNOWN AS FIELD.
Which is the smallest entity in a project?
The smallest logical data entity is called a data item or data.
What is the highest level of data hierarchy?
The highest level in the hierarchy of data organization is called database. Database is a collection of all tables which contains the data in form of fields.
What refers to the correctness and completeness of the data in a database?
Answer : (e) Reason: Data integrity refer to the correctness and completeness of the data in a database.
What is the planning phase?
The planning phase is when the project plans are documented, the project deliverables and requirements are defined, and the project schedule is created. It involves creating a set of plans to help guide your team through the implementation and closure phases of the project.
Which of the following gives a logical structure of the database graphically?
The Entity-Relationship diagram gives a logical structure of the database graphically.
Which term attribute refers to a table?
Answer: B. Attribute is a specific domain in the relation which has entries of all tuples. In the context of relational databases, a column is a set of data values, all of a single type, in a table. Columns define the data in a table, while rows populate data into the table.
Which one of the following refers to the data about data?
(d) Meta Data
It is used to store data and describes how the data is stored in databases.
Which of the following terms does not refer to the correctness and completeness of the data in database?
Discussion Forum
| Que. | Which of the following terms does refer to the correctness and completeness of the data in a database? |
|---|---|
| b. | Data constraint |
| c. | Data independence |
| d. | Data integrity |
| Answer:Data integrity |
What does DBMS stand for?
A database management system (or DBMS) is essentially nothing more than a computerized data-keeping system. Users of the system are given facilities to perform several kinds of operations on such a system for either manipulation of the data in the database or the management of the database structure itself.
Which term used to refer to a row in a table?
In the context of a relational database, a row—also called a tuple—represents a single, implicitly structured data item in a table.
Which of the following is not a schema?
| Q. | Which of the following is not an Schema? |
|---|---|
| B. | physical schema |
| C. | database schema |
| D. | critical schema |
| Answer» d. critical schema | |
What does PK mean in database?
Primary key (PK) – value which uniquely identifies every row in the table. Foreign keys (FK) – values match a primary or alternate key inherited from some other table. Alternate Keys (AK) – key associated with one or more columns whose values uniquely identify every row in the table, but which is not the primary key.
What are the 4 types of database?
Four types of database management systems
- hierarchical database systems.
- network database systems.
- object-oriented database systems.
Are the building blocks of a database?
Tables are the core primary building blocks of a database. A Table is very much like a data table or spreadsheet containing rows (records) arranged in different columns (fields).
What is an AK in SQL?
Introduction to Alternate Key in SQL. The alternate key is a combination of one or more columns whose values are unique. A table consists of one or more Candidate keys, in which one will be Primary Key and rest of the keys, are called as Alternate keys. Alternate Key is not part of the primary key.
What does SQL stand for?
Structured Query Language
SQL / Full name
SQL (pronounced “ess-que-el”) stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems.