Q. What is the purpose of a reset pin in a counter?
-
A.
To increment the count
-
B.
To set the count to zero
-
C.
To change the counting mode
-
D.
To stop the counter
Solution
The reset pin is used to set the counter back to zero.
Correct Answer:
B
— To set the count to zero
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Q. What is the purpose of a routing table?
-
A.
To store user credentials
-
B.
To keep track of network devices
-
C.
To map IP addresses to MAC addresses
-
D.
To determine the next hop for data packets
Solution
A routing table is used to determine the next hop for data packets based on their destination IP addresses.
Correct Answer:
D
— To determine the next hop for data packets
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Q. What is the purpose of a Schmitt trigger?
-
A.
To amplify signals
-
B.
To convert analog signals to digital
-
C.
To provide hysteresis in signal processing
-
D.
To rectify AC signals
Solution
A Schmitt trigger provides hysteresis, which helps in cleaning up noisy signals.
Correct Answer:
C
— To provide hysteresis in signal processing
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Q. What is the purpose of a state machine in digital design?
-
A.
To store data
-
B.
To control sequential logic
-
C.
To perform arithmetic operations
-
D.
To generate clock signals
Solution
A state machine is used to control sequential logic by defining states and transitions based on inputs.
Correct Answer:
B
— To control sequential logic
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Q. What is the purpose of a transaction in a database?
-
A.
To store data permanently
-
B.
To ensure data integrity
-
C.
To create backups
-
D.
To optimize queries
Solution
The purpose of a transaction in a database is to ensure data integrity by grouping a set of operations that must all succeed or fail together.
Correct Answer:
B
— To ensure data integrity
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Q. What is the purpose of a transaction in a DBMS?
-
A.
To store data
-
B.
To ensure data integrity
-
C.
To create indexes
-
D.
To define schemas
Solution
The purpose of a transaction in a DBMS is to ensure data integrity by grouping operations that must all succeed or fail together.
Correct Answer:
B
— To ensure data integrity
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Q. What is the purpose of a version control system?
-
A.
To manage software versions
-
B.
To deploy applications
-
C.
To monitor server performance
-
D.
To create backups
Solution
A version control system is used to manage changes to source code over time, allowing multiple developers to collaborate.
Correct Answer:
A
— To manage software versions
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Q. What is the purpose of a VLAN in a switched network?
-
A.
To increase bandwidth
-
B.
To segment network traffic
-
C.
To provide redundancy
-
D.
To enhance security
Solution
The purpose of a VLAN (Virtual Local Area Network) in a switched network is to segment network traffic, improving performance and security.
Correct Answer:
B
— To segment network traffic
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Q. What is the purpose of a VPN?
-
A.
To increase network speed
-
B.
To create a secure connection over the Internet
-
C.
To manage network devices
-
D.
To assign IP addresses
Solution
A VPN (Virtual Private Network) creates a secure connection over the Internet, protecting data from eavesdropping.
Correct Answer:
B
— To create a secure connection over the Internet
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Q. What is the purpose of an API?
-
A.
To create user interfaces
-
B.
To connect different software applications
-
C.
To store data
-
D.
To design web pages
Solution
An API (Application Programming Interface) allows different software applications to communicate with each other.
Correct Answer:
B
— To connect different software applications
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Q. What is the purpose of an associative entity in an ER model?
-
A.
To represent a many-to-many relationship
-
B.
To store attributes of a relationship
-
C.
To simplify complex relationships
-
D.
All of the above
Solution
An associative entity is used to represent a many-to-many relationship and can store attributes of that relationship.
Correct Answer:
D
— All of the above
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Q. What is the purpose of an ER diagram?
-
A.
To define SQL queries
-
B.
To visualize the database structure
-
C.
To enforce data integrity
-
D.
To optimize database performance
Solution
An ER diagram is used to visualize the database structure and relationships between entities.
Correct Answer:
B
— To visualize the database structure
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Q. What is the purpose of an ER model?
-
A.
To define the physical storage of data
-
B.
To provide a visual representation of data relationships
-
C.
To enforce data integrity constraints
-
D.
To optimize query performance
Solution
The purpose of an ER model is to provide a visual representation of data relationships.
Correct Answer:
B
— To provide a visual representation of data relationships
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Q. What is the purpose of an index in a database?
-
A.
To store data
-
B.
To speed up data retrieval
-
C.
To enforce data integrity
-
D.
To manage user access
Solution
An index is used to speed up the retrieval of rows from a database table by providing a quick lookup mechanism.
Correct Answer:
B
— To speed up data retrieval
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Q. What is the purpose of an index in SQL Server 2000?
-
A.
To enforce data integrity
-
B.
To speed up data retrieval
-
C.
To store data
-
D.
To create relationships
Solution
An index is used to speed up data retrieval in SQL Server 2000.
Correct Answer:
B
— To speed up data retrieval
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Q. What is the purpose of an IP address?
-
A.
To identify a computer on a network
-
B.
To store files on a server
-
C.
To encrypt data
-
D.
To manage hardware resources
Solution
An IP address is used to identify a device on a network and facilitate communication.
Correct Answer:
A
— To identify a computer on a network
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Q. What is the purpose of an operating system?
-
A.
To manage hardware and software resources
-
B.
To provide internet access
-
C.
To store files permanently
-
D.
To enhance graphics performance
Solution
An operating system manages hardware and software resources and provides a user interface for interaction.
Correct Answer:
A
— To manage hardware and software resources
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Q. What is the purpose of an operational amplifier (op-amp) in AC applications?
-
A.
To convert AC to DC
-
B.
To amplify AC signals
-
C.
To rectify AC signals
-
D.
To filter AC signals
Solution
Operational amplifiers are used to amplify AC signals, providing high gain and the ability to process analog signals.
Correct Answer:
B
— To amplify AC signals
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Q. What is the purpose of an operational amplifier (op-amp) in AC circuits?
-
A.
To convert AC to DC
-
B.
To amplify AC signals
-
C.
To filter out noise
-
D.
To rectify AC signals
Solution
Op-amps are commonly used to amplify AC signals in various applications.
Correct Answer:
B
— To amplify AC signals
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Q. What is the purpose of an operational amplifier (op-amp) in analog circuits?
-
A.
To convert digital signals to analog
-
B.
To amplify voltage signals
-
C.
To rectify AC signals
-
D.
To store charge
Solution
An operational amplifier is primarily used to amplify voltage signals in various analog applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the purpose of an operational amplifier in a circuit?
-
A.
To act as a voltage follower
-
B.
To amplify voltage differences
-
C.
To filter signals
-
D.
All of the above
Solution
Operational amplifiers can perform various functions including amplification, filtering, and buffering.
Correct Answer:
D
— All of the above
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Q. What is the purpose of an operational amplifier in an RC circuit?
-
A.
To rectify the signal
-
B.
To amplify the signal
-
C.
To filter the signal
-
D.
To switch the signal
Solution
Operational amplifiers can be used in RC circuits to filter signals, such as in low-pass or high-pass configurations.
Correct Answer:
C
— To filter the signal
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Q. What is the purpose of an operational amplifier?
-
A.
To rectify AC signals
-
B.
To amplify voltage signals
-
C.
To switch electronic signals
-
D.
To store charge
Solution
Operational amplifiers are designed to amplify voltage signals, often used in various analog applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the purpose of Bridge Protocol Data Units (BPDUs) in STP?
-
A.
To carry user data
-
B.
To share information about the network topology
-
C.
To manage IP addresses
-
D.
To encrypt data
Solution
BPDUs are used to share information about the network topology and help in the election of the Root Bridge.
Correct Answer:
B
— To share information about the network topology
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Q. What is the purpose of concurrency control in a database?
-
A.
To ensure data redundancy
-
B.
To manage simultaneous operations without conflicting
-
C.
To improve data integrity
-
D.
To simplify database queries
Solution
Concurrency control is used to manage simultaneous operations on a database to prevent conflicts and ensure data integrity.
Correct Answer:
B
— To manage simultaneous operations without conflicting
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Q. What is the purpose of concurrency control in a DBMS?
-
A.
To manage data redundancy
-
B.
To ensure data integrity during simultaneous transactions
-
C.
To optimize query performance
-
D.
To simplify database design
Solution
Concurrency control ensures data integrity when multiple transactions occur simultaneously in a database.
Correct Answer:
B
— To ensure data integrity during simultaneous transactions
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Q. What is the purpose of CSS?
-
A.
To structure web content
-
B.
To style web content
-
C.
To store web content
-
D.
To retrieve web content
Solution
CSS (Cascading Style Sheets) is used to style and layout web pages, including colors, fonts, and spacing.
Correct Answer:
B
— To style web content
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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
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Q. What is the purpose of doping in semiconductor fabrication?
-
A.
To increase the size of the chip
-
B.
To enhance electrical conductivity
-
C.
To reduce power consumption
-
D.
To improve thermal conductivity
Solution
Doping is used to enhance the electrical conductivity of semiconductors by adding impurities.
Correct Answer:
B
— To enhance electrical conductivity
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Q. What is the purpose of error control in networking?
-
A.
To increase bandwidth
-
B.
To ensure data integrity
-
C.
To reduce latency
-
D.
To manage network devices
Solution
The purpose of error control in networking is to ensure data integrity by detecting and correcting errors in transmitted data.
Correct Answer:
B
— To ensure data integrity
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