Q. What is the purpose of data normalization in a data warehouse?
A.To reduce data redundancy
B.To improve query performance
C.To enhance data integrity
D.To simplify data retrieval
Solution
Normalization aims to reduce data redundancy and improve data integrity, although data warehouses often use denormalization for performance.
Correct Answer: A — To reduce data redundancy
Q. What is the purpose of ETL in data warehousing?
A.Extract, Transform, Load
B.Evaluate, Test, Launch
C.Execute, Transfer, Log
D.Enhance, Transfer, Load
Solution
ETL stands for Extract, Transform, Load, which is the process of moving data from source systems into a data warehouse.
Correct Answer: A — Extract, Transform, Load
Q. What is the purpose of indexing in a database?
A.To enforce data integrity
B.To speed up data retrieval
C.To normalize data
D.To create relationships between tables
Solution
Indexing is used to speed up data retrieval operations on a database.
Correct Answer: B — To speed up data retrieval
Q. What is the purpose of indexing in a distributed database?
A.To increase data redundancy
B.To speed up data retrieval
C.To ensure data consistency
D.To manage user permissions
Solution
Indexing in a distributed database is used to speed up data retrieval by creating a data structure that allows for faster searches.
Correct Answer: B — To speed up data retrieval
Q. What is the purpose of normalization in a database?
A.To increase redundancy
B.To eliminate data anomalies
C.To improve query performance
D.To simplify database design
Solution
Normalization is a process that organizes data to reduce redundancy and improve data integrity by eliminating data anomalies.
Correct Answer: B — To eliminate data anomalies
Q. What is the purpose of normalization in database design?
A.To increase redundancy
B.To eliminate data anomalies
C.To simplify the ER diagram
D.To enhance query performance
Solution
Normalization is used to eliminate data anomalies and reduce redundancy in database design.
Correct Answer: B — To eliminate data anomalies
Q. What is the purpose of normalization in databases?
A.To increase redundancy
B.To reduce data anomalies
C.To improve performance
D.To simplify queries
Solution
The purpose of normalization in databases is to reduce data anomalies and ensure data integrity.
Correct Answer: B — To reduce data anomalies
Q. What is the purpose of the 'GROUP BY' clause in SQL?
A.To sort the result set
B.To aggregate data across multiple records
C.To filter records
D.To join multiple tables
Solution
'GROUP BY' is used to aggregate data across multiple records, often used with aggregate functions like COUNT, SUM, AVG.
Correct Answer: B — To aggregate data across multiple records
Q. What is the purpose of the IPv6 address prefix?
A.To identify the host within a network
B.To define the network portion of the address
C.To provide a unique identifier for the device
D.To indicate the type of service
Solution
The IPv6 address prefix defines the network portion of the address, allowing for efficient routing and addressing within the network.
Correct Answer: B — To define the network portion of the address
Q. What is the purpose of the IPv6 address prefix?
A.To identify the host within a network
B.To define the network portion of the address
C.To provide a unique identifier for the device
D.To indicate the type of service
Solution
The IPv6 address prefix defines the network portion of the address, allowing for efficient routing and addressing within the network.
Correct Answer: B — To define the network portion of the address
Q. What is the purpose of the IPv6 address prefix?
A.To identify the host within a network
B.To define the network portion of the address
C.To provide a unique identifier for the device
D.To indicate the type of service
Solution
The IPv6 address prefix defines the network portion of the address, allowing for efficient routing and addressing within the network.
Correct Answer: B — To define the network portion of the address
Q. What is the purpose of the IPv6 flow label field?
A.To identify the source of the packet
B.To prioritize packets for quality of service
C.To indicate the destination address
D.To provide error detection
Solution
The flow label field in an IPv6 header is used to identify packets that require special handling, such as for quality of service (QoS) purposes.
Correct Answer: B — To prioritize packets for quality of service
Q. What is the purpose of the IPv6 flow label field?
A.To identify the source of the packet
B.To prioritize packets for quality of service
C.To indicate the destination address
D.To provide error detection
Solution
The flow label field in an IPv6 header is used to identify packets that require special handling, such as for quality of service (QoS) purposes.
Correct Answer: B — To prioritize packets for quality of service
Q. What is the purpose of the IPv6 flow label field?
A.To identify the source of the packet
B.To prioritize packets for quality of service
C.To indicate the destination address
D.To provide error detection
Solution
The flow label field in an IPv6 header is used to identify packets that require special handling, such as for quality of service (QoS) purposes.
Correct Answer: B — To prioritize packets for quality of service
Q. What is the purpose of the IPv6 link-local address?
A.To communicate with devices on the same local network
B.To route packets across the internet
C.To provide a unique global address
D.To facilitate NAT operations
Solution
IPv6 link-local addresses are used for communication between nodes on the same local network segment and are not routable beyond that segment.
Correct Answer: A — To communicate with devices on the same local network
Q. What is the purpose of the IPv6 link-local address?
A.To communicate with devices on the same local network
B.To route packets across the internet
C.To provide a unique global address
D.To facilitate NAT operations
Solution
IPv6 link-local addresses are used for communication between nodes on the same local network segment and are not routable beyond that segment.
Correct Answer: A — To communicate with devices on the same local network
Q. What is the purpose of the IPv6 link-local address?
A.To communicate with devices on the same local network
B.To route packets across the internet
C.To provide a unique global address
D.To facilitate NAT operations
Solution
IPv6 link-local addresses are used for communication between nodes on the same local network segment and are not routable beyond that segment.
Correct Answer: A — To communicate with devices on the same local network
Q. What is the result of applying the first normal form (1NF) to a table?
A.All attributes are atomic
B.No transitive dependencies exist
C.All non-key attributes are dependent on the primary key
D.The table has no duplicate rows
Solution
Applying the first normal form (1NF) ensures that all attributes in a table are atomic, meaning they cannot be divided further.
Correct Answer: A — All attributes are atomic
Q. What is the role of a dimension table in a data warehouse?
A.To store transactional data
B.To provide context to fact data
C.To manage user access
D.To perform data cleansing
Solution
Dimension tables provide context to the fact data, allowing users to analyze the facts in relation to various attributes.
Correct Answer: B — To provide context to fact data
Q. What is the role of a transaction manager in a distributed database?
A.To manage data replication
B.To ensure ACID properties across distributed transactions
C.To handle user authentication
D.To optimize query performance
Solution
The transaction manager in a distributed database ensures that ACID properties (Atomicity, Consistency, Isolation, Durability) are maintained across distributed transactions.
Correct Answer: B — To ensure ACID properties across distributed transactions
Q. What is the role of attributes in an ER model?
A.To define relationships
B.To provide additional information about entities
C.To serve as primary keys
D.To represent constraints
Solution
Attributes provide additional information about entities in an ER model.
Correct Answer: B — To provide additional information about entities
Q. What is the role of indexing in a data warehouse?
A.To ensure data integrity
B.To speed up query performance
C.To normalize data
D.To manage user access
Solution
Indexing in a data warehouse is used to speed up query performance by allowing faster data retrieval.
Correct Answer: B — To speed up query performance
Q. What is the size of an IPv6 address?
A.32 bits
B.64 bits
C.128 bits
D.256 bits
Solution
An IPv6 address is 128 bits long, which allows for a significantly larger number of unique addresses compared to the 32-bit IPv4 address.
Correct Answer: C — 128 bits
Q. What is the size of an IPv6 address?
A.32 bits
B.64 bits
C.128 bits
D.256 bits
Solution
An IPv6 address is 128 bits long, which allows for a significantly larger number of unique addresses compared to the 32-bit IPv4 address.
Correct Answer: C — 128 bits
Q. What is the size of an IPv6 address?
A.32 bits
B.64 bits
C.128 bits
D.256 bits
Solution
An IPv6 address is 128 bits long, which allows for a significantly larger number of unique addresses compared to the 32-bit IPv4 address.
Correct Answer: C — 128 bits
Q. What SQL command is used to retrieve data from a database?
A.SELECT
B.GET
C.FETCH
D.RETRIEVE
Solution
The SELECT command is used to retrieve data from a database in SQL.
Correct Answer: A — SELECT
Q. Which architecture is commonly used in a client-server database system?
A.Two-tier architecture
B.Three-tier architecture
C.N-tier architecture
D.All of the above
Solution
All of the above architectures can be used in client-server database systems, depending on the complexity and requirements of the application.
Correct Answer: D — All of the above
Q. Which architecture is commonly used in a DBMS?
A.Two-Tier Architecture
B.Three-Tier Architecture
C.Client-Server Architecture
D.All of the above
Solution
All of the above architectures are commonly used in a DBMS to separate the user interface, application logic, and data storage.
Correct Answer: D — All of the above
Q. Which architecture is commonly used in modern DBMS?
A.Single-tier architecture
B.Two-tier architecture
C.Three-tier architecture
D.Four-tier architecture
Solution
The three-tier architecture is commonly used in modern DBMS, separating the user interface, application logic, and database management.
Correct Answer: C — Three-tier architecture
Q. Which component of a DBMS is responsible for managing data storage?
A.Query Processor
B.Storage Manager
C.Transaction Manager
D.Buffer Manager
Solution
The Storage Manager is responsible for managing data storage in a DBMS.
