Following are the multiple choice questions of data base management system (DBMS) and SQL concepts based on the UGC-NET exams, TET exams and other competitive exams point of view.
1) Related fields in a database are grouped to form ?
1) Related fields in a database are grouped to form ?
- Data Fields
- Data Record
- Menu
- Bank
- None of above
Show/Hide Answer
Answer = B
Explanation: Related fields in the data base are grouped into the Records. Records are the total of all information of a particular item.
2) Entities having primary key are called ? Explanation: Related fields in the data base are grouped into the Records. Records are the total of all information of a particular item.
- Primary Entities
- Strong Entities
- Weak Entities
- Primary Key
Show/Hide Answer
Answer = B
Explanation: Entity having its own primary key is called a strong entity and the entity not having its own primary key is called a weak entity.
3) In the E-R diagrams, the term cardinality is a synonym for the term ? Explanation: Entity having its own primary key is called a strong entity and the entity not having its own primary key is called a weak entity.
- Attribute
- Degree
- Entities
- Cartesian
Show/Hide Answer
Answer = D
Explanation: No Explanation
4) TRUNCATE statement in SQL is a ? Explanation: No Explanation
- DML statement
- DDL statement
- DCL statement
- None of above
Show/Hide Answer
Answer = B
Explanation: TRUNCATE statement remove all records from a table, including all spaces allocated for the records are removed.
5) The default date format in SQL is ? Explanation: TRUNCATE statement remove all records from a table, including all spaces allocated for the records are removed.
- DD-MON-YY
- DD-MM-YY
- DD-MM-YYY
- MM-DD-YY
Show/Hide Answer
Answer = A
Explanation: No Explanation
6) For adding number of hours to a date, which of the following statement is used ? Explanation: No Explanation
- Date + Number
- Date + Number/24
- Date + Number of Hours
- None of above
Show/Hide Answer
Answer = B
Explanation: For example we want to add 3hrs to the date then we use the statement :
DATE + 3/24
7) Which syntax is the more accurate for creating SYNONYM ? Explanation: For example we want to add 3hrs to the date then we use the statement :
DATE + 3/24
- CREATE [PUBLIC] SYNONYM synonym for object
- CREATE SYNONYM synonym for object from table name
- CREATE [PUBLIC] SYNONYM synonym for column name
- None of these
Show/Hide Answer
Answer = A
Explanation: No Explanation
8) A data dictionary is a special file that contains ? Explanation: No Explanation
- the names of all fields in all files
- the data types of all fields in all files
- the widths of all fields in all files
- All of above
- None of above
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9) A command that lets you change one or more fields of a record is ? - insert
- Modify
- Look-up
- All of above
- None of above
Show/Hide Answer
Answer = B
Explanation: No Explanation
10) In a large DBMS ? Explanation: No Explanation
- Each user can see only a small part of the entire database
- Each user can access every sub schema
- Each sub schema contains every field in the logical schema
- All of above
- None of above
Show/Hide Answer
Answer = A
Explanation: No Explanation
Explanation: No Explanation
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