GATE Exam: DBMS Trivia Quiz
The GATE exam is upon us, and this trivia quiz is perfect for those of you who want to refresh their knowledge when it comes to DBMS. Are you one of them? Well, don’t just stare at the screen, press start, and be a step closure to the grade you desire with every answer you get right. All the best!
Questions and Answers
- 1.
-------------------------------responsible for authorizing access to the database, for co-ordinating and monitoring its use, acquiring software, and hardware resources, controlling its use and monitoring efficiency of operations.
- A.
Authorization Manager
- B.
Storage Manager
- C.
File Manager
- D.
Transcation Manager
- E.
Buffer Manager
Correct Answer
E. Buffer ManagerExplanation
The Buffer Manager is responsible for managing the buffer pool, which is a portion of memory used to temporarily store data pages from the database. It is responsible for authorizing access to the database, coordinating and monitoring its use, acquiring software and hardware resources, controlling its use, and monitoring the efficiency of operations. The Buffer Manager ensures that frequently accessed data is kept in memory to improve performance and reduce disk I/O.Rate this question:
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- 2.
------------------------------is a property that describes various characteristics of an entity
- A.
ER Diagram
- B.
Column
- C.
Relationship
- D.
Attribute
Correct Answer
D. AttributeExplanation
An attribute is a property that describes various characteristics of an entity. In an ER diagram, attributes are used to define the specific details or qualities of an entity. They provide additional information about the entity and help in understanding its characteristics. Attributes can include things like name, age, size, color, etc. They play a crucial role in the design and organization of a database by providing a way to categorize and differentiate entities.Rate this question:
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- 3.
---------------------- level describes what data is stored in the database and the relationships among the data
- A.
Physical Level
- B.
Logical Level
- C.
Conceptual Level
- D.
None of the above
Correct Answer
B. Logical LevelExplanation
The logical level in a database describes what data is stored and the relationships among the data. It focuses on the overall structure and organization of the data, independent of any specific technology or implementation. At this level, the emphasis is on defining the entities, attributes, and relationships in a way that is meaningful to the users and applications accessing the database. The logical level provides a conceptual framework for understanding and manipulating the data, serving as an intermediate layer between the physical level (which deals with the storage and retrieval of data) and the conceptual level (which deals with the overall design and requirements of the database).Rate this question:
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- 4.
------------------------ denote derived attributes.
- A.
Double ellipse
- B.
Dashed ellipse
- C.
Squared ellipse
- D.
Ellipse with attribute name underlined
Correct Answer
B. Dashed ellipseExplanation
The correct answer is "Dashed ellipse". In the context of the given options, a dashed ellipse is commonly used to denote derived attributes. Derived attributes are attributes that are derived or calculated from other attributes in the data model. Using a dashed ellipse helps to visually distinguish these attributes from other types of attributes, such as regular or composite attributes.Rate this question:
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- 5.
A ----------------------- is an association between entities
- A.
Relation
- B.
One to One
- C.
Generalization
- D.
Specialization
Correct Answer
A. RelationExplanation
A relation is an association between entities. It represents the connection or link between two or more entities in a database. It defines how the entities are related or connected to each other and allows for the retrieval and manipulation of data based on these relationships. In other words, a relation establishes a logical connection between different entities, enabling efficient data management and retrieval.Rate this question:
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- 6.
--------------------------- stores metadata about the structure of the data base
- A.
Physical data base
- B.
Query Analyzer
- C.
Data Dictionary
- D.
Data Catalog
Correct Answer
C. Data DictionaryExplanation
A data dictionary is a tool that stores metadata about the structure of a database. It contains information about the tables, columns, data types, constraints, and relationships within the database. This information is used by database administrators, developers, and other users to understand and manage the database. It helps in maintaining data integrity, ensuring consistency, and providing a centralized source of information about the database schema.Rate this question:
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- 7.
--------------------------is a collection of operations that perform s single logical function in a database application
- A.
Transaction
- B.
Concurrent operation
- C.
Atomocity
- D.
Durability
Correct Answer
A. TransactionExplanation
A transaction is a collection of operations that perform a single logical function in a database application. It ensures that all the operations within it are executed as a single unit, either all of them are successfully completed or none of them are. This guarantees the integrity and consistency of the database. Additionally, a transaction provides properties like atomicity, consistency, isolation, and durability to ensure that the database remains in a reliable state even in the event of failures or errors.Rate this question:
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- 8.
The problem that is compounded when constraints involve several data items from different files are Called ------------------------------------
- A.
Transaction Control Management Problem
- B.
Security Problem
- C.
Integrity Problem
- D.
Durability Problem
Correct Answer
C. Integrity ProblemExplanation
When constraints involve several data items from different files, it can lead to an integrity problem. Integrity refers to the accuracy and consistency of data. In this scenario, if constraints are not properly enforced across multiple files, it can result in data inconsistencies and errors. For example, if a constraint requires that a certain data item in one file must match a corresponding data item in another file, failure to enforce this constraint can lead to integrity issues where the data becomes inaccurate or inconsistent. Therefore, the correct answer is Integrity Problem.Rate this question:
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- 9.
Ensuring atomicity is the responsibility of the --------------------------component
- A.
File Manager
- B.
Buffer Manager
- C.
DBA
- D.
Transation Manager
Correct Answer
D. Transation ManagerExplanation
The correct answer is Transaction Manager. The Transaction Manager component is responsible for ensuring atomicity in a system. Atomicity refers to the property of a transaction where all the operations within the transaction are treated as a single unit of work. This means that either all the operations within the transaction are executed successfully or none of them are executed at all. The Transaction Manager ensures that if any part of the transaction fails, the entire transaction is rolled back and the system is left in its original state.Rate this question:
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- 10.
-------------------manages the allocation of the space on the disk storage and the data base structure used to represent information stored on disk
- A.
Disk Manager
- B.
File Manager
- C.
Buffer Manager
- D.
Memory Manager
- E.
None of the above
Correct Answer
B. File ManagerExplanation
The correct answer is File Manager. The File Manager is responsible for managing the allocation of space on the disk storage and the database structure used to represent information stored on the disk. It handles tasks such as creating, opening, closing, and deleting files, as well as organizing and maintaining the file system structure. The File Manager ensures efficient and secure access to data stored on the disk and provides a layer of abstraction between the user and the physical storage medium.Rate this question:
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- 11.
----------------------------is the minimal super key
- A.
Primary Key
- B.
Candidate Key
- C.
Surrogate Key
- D.
Unique Key
- E.
Alternate Key
Correct Answer
B. Candidate KeyExplanation
A candidate key is a minimal super key, meaning it is a set of attributes that uniquely identifies each tuple in a relation, and no proper subset of that set can also uniquely identify the tuples. Therefore, the given statement "Candidate Key is the minimal super key" is a correct explanation.Rate this question:
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- 12.
-----------------------------engine executes low level instructions generated by the DML compilier
- A.
DDL Analyzer
- B.
Query Interpreter
- C.
Database Engine
- D.
None of the above
Correct Answer
D. None of the aboveExplanation
The given correct answer is "None of the above" because the statement provided does not match any of the options given. The statement suggests that the engine executes low-level instructions generated by the DML compiler, but none of the options provided match this description. Therefore, the correct answer is "None of the above".Rate this question:
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- 13.
--------------------------responsible to define the content, the structure, the constraints, and functions or transactions against the database
- A.
Transcation Manager
- B.
Query Analyzer
- C.
DBA
- D.
All the above
- E.
None of the above
Correct Answer
C. DBAExplanation
A Database Administrator (DBA) is responsible for defining the content, structure, constraints, and functions or transactions against the database. They are in charge of managing and maintaining the database, ensuring its integrity, security, and performance. They also handle tasks such as data backup and recovery, user access control, and database optimization. Therefore, the correct answer is DBA.Rate this question:
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- 14.
In ER model ---------------------------denote derived attributes
- A.
Double ellipse
- B.
Diamond
- C.
Reactangle
- D.
None of the above
Correct Answer
D. None of the above -
- 15.
--------------------attributes can be divided into parts (Write the answer in lowercase)
Correct Answer
Composite, compositeExplanation
The term "composite" refers to something that is made up of multiple parts or elements. In this context, it suggests that attributes can be divided or broken down into smaller components. The repetition of the word "composite" emphasizes this idea and reinforces the concept that attributes are not singular entities, but rather composed of various elements.Rate this question:
- 16.
Foreign Key can be null
- A.
TRUE
- B.
FALSE
Correct Answer
A. TRUEExplanation
The given answer is true because a foreign key can be null. In a database, a foreign key is a field that references the primary key of another table. By default, foreign keys are allowed to have null values, which means they can be empty or not assigned to any value. This allows for flexibility in data relationships and allows for optional associations between tables. However, it is important to note that the null value in a foreign key should be handled carefully to avoid any data integrity issues.Rate this question:
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- 17.
All primary keys should be super keys.
- A.
TRUE
- B.
FALSE
Correct Answer
A. TRUEExplanation
A super key is a set of one or more attributes that can uniquely identify a record in a database table. A primary key is a special type of super key that is chosen as the main identifier for a table. Since a primary key is a super key by definition, it is true that all primary keys should be super keys.Rate this question:
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- 18.
In Relational database Data is stored as record types and the relationship is represented by set types
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In a relational database, data is stored in the form of record types, which are essentially tables. These tables consist of rows and columns, with each row representing a record and each column representing a specific attribute or field. The relationship between different tables is represented by set types, such as foreign keys, which establish connections between related records in different tables. Therefore, the statement that data is stored as record types and the relationship is represented by set types is true in the context of a relational database.Rate this question:
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- 19.
In Hierarchical database to get to a low-level table, you start at the root and work your way down the tree until you reach your target data.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In a hierarchical database, the data is organized in a tree-like structure with a root node at the top. To access a low-level table, you need to start at the root and follow the branches down the tree until you reach the desired data. This is the characteristic feature of hierarchical databases, where data is organized in a parent-child relationship. Therefore, the statement is true.Rate this question:
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- 20.
Using relational model we design conceptual database design
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement "Using relational model we design conceptual database design" is false. The relational model is used to design the logical database design, not the conceptual database design. The conceptual database design is created using other techniques such as entity-relationship modeling or object-oriented modeling.Rate this question:
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- 21.
Conceptual data model is the source of information for logical design phase
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The conceptual data model serves as the foundation for the logical design phase. It provides a high-level representation of the data requirements and relationships in an organization, independent of any specific database management system or technology. The conceptual data model helps to capture the essential business concepts and rules, which are then translated into a logical design that defines the structure and organization of the data. Therefore, the statement that the conceptual data model is the source of information for the logical design phase is true.Rate this question:
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- 22.
Logical database design describes describes base relations, file organizations, and indexes that are used to achieve efficient access to data.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because logical database design does not describe base relations, file organizations, and indexes. Logical database design focuses on the conceptual representation of the database, including the entities, relationships, and attributes. It is concerned with the overall structure and organization of the data, rather than the specific implementation details such as file organizations and indexes. These implementation details are addressed in the physical database design phase.Rate this question:
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- 23.
Conceptual data modeling uses a high level data modeling concept of E-R Models
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Conceptual data modeling involves creating an abstract representation of the data requirements for a system. This is typically done using an Entity-Relationship (E-R) model, which helps to identify and define the various entities (objects, concepts, or things) in the system, their attributes, and the relationships between them. Therefore, the statement that conceptual data modeling uses E-R models is true. E-R models provide a visual way to represent the structure and relationships of the data, making it easier to understand and communicate the data requirements during the early stages of system development.Rate this question:
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- 24.
Tables are required to have at least one column
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Tables are a fundamental component of a database, and they are used to organize and store data. In order for a table to be functional and meaningful, it must have at least one column. A column represents a specific attribute or characteristic of the data being stored in the table. Without any columns, a table would not be able to hold or display any data, rendering it useless. Therefore, it is necessary for tables to have at least one column.Rate this question:
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- 25.
Logical data independence: Refers to the separation of the external views from the conceptual view
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Logical data independence refers to the ability to modify the conceptual schema without affecting the external schema or applications that use the database. This means that changes made to the logical structure of the database, such as adding or modifying tables and relationships, will not require changes to be made to the external views or applications. Therefore, the statement that logical data independence refers to the separation of external views from the conceptual view is true.Rate this question:
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- 26.
Duplication of data is the disadvantage of DBMS
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement that duplication of data is a disadvantage of DBMS is false. In fact, one of the main advantages of a DBMS is that it helps to eliminate data duplication. By using a centralized database, DBMS ensures that data is stored in a structured and organized manner, reducing redundancy and improving data integrity. This allows for efficient storage and retrieval of information, as well as easier maintenance and updates. Therefore, duplication of data is not a disadvantage, but rather a problem that DBMS helps to solve.Rate this question:
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- 27.
Candidate key can have a null value
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
A candidate key is a unique identifier for a record in a database table. It cannot have a null value because it needs to uniquely identify each record. If a candidate key had a null value, it would not be able to fulfill its purpose of uniquely identifying records. Therefore, the statement that a candidate key can have a null value is false.Rate this question:
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- 28.
Each program maintains its own set of data. So users of one program may be unaware of potentially useful data held by other programs this leads to Duplication of data
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The given statement is false. Each program maintains its own set of data, but this does not necessarily lead to duplication of data. It is possible for programs to share and access data from other programs through various methods such as APIs, databases, or file sharing. Therefore, users of one program may still be aware of and able to utilize data held by other programs without duplication.Rate this question:
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- 29.
A traditional database stores just data – with no procedures
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A traditional database only stores data and does not include any procedures. This means that it does not have built-in functionality to perform actions or execute operations on the data. Instead, it relies on external programs or applications to manipulate the data stored in the database.Rate this question:
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- 30.
Simple Attribute composed of multiple components, each with an independent existence.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
A simple attribute is not composed of multiple components with independent existence. Instead, a simple attribute represents a single value within an entity or object. It does not have any sub-components or parts. Therefore, the correct answer is false.Rate this question:
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- 31.
Cardinality specifies how many instances of an entity relate to one instance of another entity.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Cardinality in entity-relationship modeling refers to the relationship between two entities and specifies how many instances of one entity can be associated with one instance of another entity. In other words, it determines the number of occurrences or instances that can exist in a relationship. Therefore, the given statement is true as it accurately defines the concept of cardinality in entity relationships.Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Jul 07, 2012Quiz Created by
Nauakrimilgai
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