Q. What is the primary use of an active low-pass filter using an op-amp?
A.
To amplify high-frequency signals
B.
To allow low-frequency signals to pass while attenuating high frequencies
C.
To rectify AC signals
D.
To provide isolation between circuits
Show solution
Solution
An active low-pass filter allows low-frequency signals to pass while attenuating high-frequency signals, using an op-amp for gain.
Correct Answer:
B
— To allow low-frequency signals to pass while attenuating high frequencies
Learn More →
Q. What is the primary use of an op-amp as a peak detector?
A.
To measure average voltage
B.
To store the peak value of an input signal
C.
To amplify low-frequency signals
D.
To filter out noise
Show solution
Solution
An op-amp configured as a peak detector is used to store the peak value of an input signal for later retrieval.
Correct Answer:
B
— To store the peak value of an input signal
Learn More →
Q. What is the primary use of an operational amplifier (op-amp) in AC circuits?
A.
To rectify AC to DC
B.
To amplify AC signals
C.
To filter DC signals
D.
To convert AC to digital signals
Show solution
Solution
The primary use of an operational amplifier (op-amp) in AC circuits is to amplify AC signals.
Correct Answer:
B
— To amplify AC signals
Learn More →
Q. What is the primary use of an operational amplifier?
A.
To rectify AC signals
B.
To amplify voltage signals
C.
To switch electronic devices
D.
To store data
Show solution
Solution
Operational amplifiers are primarily used to amplify voltage signals in various applications.
Correct Answer:
B
— To amplify voltage signals
Learn More →
Q. What is the primary use of BJTs in analog circuits?
A.
Switching
B.
Signal amplification
C.
Voltage regulation
D.
Oscillation
Show solution
Solution
BJTs are primarily used for signal amplification in analog circuits.
Correct Answer:
B
— Signal amplification
Learn More →
Q. What is the primary use of capacitors in rectifier circuits?
A.
To increase voltage
B.
To filter out noise
C.
To store energy
D.
To convert AC to DC
Show solution
Solution
Capacitors are used in rectifier circuits to filter out noise and smooth the output voltage.
Correct Answer:
B
— To filter out noise
Learn More →
Q. What is the primary use of flip-flops in digital systems?
A.
Data transmission
B.
Data storage
C.
Signal amplification
D.
Analog processing
Show solution
Solution
Flip-flops are primarily used for data storage in digital systems, holding binary information.
Correct Answer:
B
— Data storage
Learn More →
Q. What is the primary winding of a transformer connected to?
A.
A load
B.
A power source
C.
A capacitor
D.
A resistor
Show solution
Solution
The primary winding of a transformer is connected to a power source, which provides the input voltage.
Correct Answer:
B
— A power source
Learn More →
Q. What is the principle of operation of a transformer?
A.
Electromagnetic induction
B.
Capacitance
C.
Resistance heating
D.
Thermal conduction
Show solution
Solution
Transformers operate on the principle of electromagnetic induction, where a changing magnetic field induces voltage in a coil.
Correct Answer:
A
— Electromagnetic induction
Learn More →
Q. What is the purpose of a clock signal in digital circuits?
A.
To power the circuit
B.
To synchronize operations
C.
To reduce noise
D.
To increase speed
Show solution
Solution
The clock signal is used to synchronize operations in digital circuits, ensuring that all components operate in a coordinated manner.
Correct Answer:
B
— To synchronize operations
Learn More →
Q. What is the purpose of a data dictionary in a DBMS?
A.
To store user data
B.
To define the structure of the database
C.
To manage user access
D.
To optimize query performance
Show solution
Solution
A data dictionary defines the structure of the database, including tables, fields, data types, and relationships.
Correct Answer:
B
— To define the structure of the database
Learn More →
Q. What is the purpose of a data model in database design?
A.
To define the physical storage of data
B.
To represent data structures and relationships
C.
To optimize query performance
D.
To enforce data integrity constraints
Show solution
Solution
A data model represents data structures and relationships, serving as a blueprint for database design.
Correct Answer:
B
— To represent data structures and relationships
Learn More →
Q. What is the purpose of a database schema?
A.
To store data
B.
To define the structure of the database
C.
To manage user access
D.
To optimize queries
Show solution
Solution
A database schema defines the structure of the database, including tables, fields, relationships, and constraints.
Correct Answer:
B
— To define the structure of the database
Learn More →
Q. What is the purpose of a decoder in digital electronics?
A.
To encode data
B.
To convert binary to decimal
C.
To select one output from multiple inputs
D.
To convert decimal to binary
Show solution
Solution
A decoder selects one output from multiple inputs based on the binary value of the inputs.
Correct Answer:
C
— To select one output from multiple inputs
Learn More →
Q. What is the purpose of a die in integrated circuits?
A.
To package the IC
B.
To serve as a substrate
C.
To house the transistors
D.
To connect to external circuits
Show solution
Solution
A die is the small block of semiconducting material on which a functional circuit is fabricated, housing the transistors.
Correct Answer:
C
— To house the transistors
Learn More →
Q. What is the purpose of a differential amplifier?
A.
To amplify a single-ended signal
B.
To amplify the difference between two input signals
C.
To rectify AC signals
D.
To provide isolation between circuits
Show solution
Solution
A differential amplifier amplifies the difference between two input signals, rejecting any common-mode noise.
Correct Answer:
B
— To amplify the difference between two input signals
Learn More →
Q. What is the purpose of a firewall in a network?
A.
To increase internet speed
B.
To protect against unauthorized access
C.
To store data
D.
To manage network traffic
Show solution
Solution
A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules, protecting against unauthorized access.
Correct Answer:
B
— To protect against unauthorized access
Learn More →
Q. What is the purpose of a firewall?
A.
To speed up internet connection
B.
To protect a network from unauthorized access
C.
To store data
D.
To manage network traffic
Show solution
Solution
A firewall is a security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Correct Answer:
B
— To protect a network from unauthorized access
Learn More →
Q. What is the purpose of a foreign key in a database?
A.
To uniquely identify a record
B.
To establish a link between two tables
C.
To enforce data integrity
D.
To improve query performance
Show solution
Solution
A foreign key is used to establish a link between two tables in a database.
Correct Answer:
B
— To establish a link between two tables
Learn More →
Q. What is the purpose of a foreign key in a relational database?
A.
To uniquely identify a record
B.
To create a relationship between two tables
C.
To enforce data integrity
D.
All of the above
Show solution
Solution
A foreign key serves to create a relationship between two tables and enforce data integrity by ensuring that the value in one table corresponds to a valid record in another.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the purpose of a full adder in digital circuits?
A.
To add two binary numbers
B.
To add three binary numbers
C.
To perform subtraction
D.
To perform multiplication
Show solution
Solution
A full adder adds three binary digits, including carry from a previous addition.
Correct Answer:
B
— To add three binary numbers
Learn More →
Q. What is the purpose of a logic synthesis tool in PLD design?
A.
To convert high-level code into a gate-level representation
B.
To simulate the behavior of the PLD
C.
To program the PLD directly
D.
To test the PLD after programming
Show solution
Solution
A logic synthesis tool converts high-level code (like VHDL or Verilog) into a gate-level representation that can be implemented on a PLD.
Correct Answer:
A
— To convert high-level code into a gate-level representation
Learn More →
Q. What is the purpose of a low-pass filter in an analog circuit?
A.
To allow high-frequency signals to pass
B.
To block all signals
C.
To allow low-frequency signals to pass
D.
To amplify all signals
Show solution
Solution
A low-pass filter allows low-frequency signals to pass while attenuating high-frequency signals.
Correct Answer:
C
— To allow low-frequency signals to pass
Learn More →
Q. What is the purpose of a memory cache?
A.
To store data permanently
B.
To speed up data access for the CPU
C.
To increase the total storage capacity
D.
To manage power consumption
Show solution
Solution
A memory cache is used to speed up data access for the CPU by storing frequently accessed data closer to the processor.
Correct Answer:
B
— To speed up data access for the CPU
Learn More →
Q. What is the purpose of a multiplexer in digital circuits?
A.
To amplify signals
B.
To select one of many inputs
C.
To store data
D.
To perform addition
Show solution
Solution
A multiplexer selects one of many input signals and forwards the selected input into a single line.
Correct Answer:
B
— To select one of many inputs
Learn More →
Q. What is the purpose of a multiplexer?
A.
To store data
B.
To select one of many inputs
C.
To perform arithmetic operations
D.
To convert analog signals to digital
Show solution
Solution
A multiplexer selects one of many inputs to pass to the output based on control signals.
Correct Answer:
B
— To select one of many inputs
Learn More →
Q. What is the purpose of a primary key in a database table?
A.
To uniquely identify each record
B.
To link tables together
C.
To enforce data types
D.
To store large amounts of data
Show solution
Solution
A primary key is used to uniquely identify each record in a database table.
Correct Answer:
A
— To uniquely identify each record
Learn More →
Q. What is the purpose of a primary key in a database?
A.
To uniquely identify a record
B.
To link two tables
C.
To enforce data integrity
D.
To speed up queries
Show solution
Solution
A primary key is used to uniquely identify each record in a database table.
Correct Answer:
A
— To uniquely identify a record
Learn More →
Q. What is the purpose of a primary key in a relational database?
A.
To uniquely identify each record in a table
B.
To create relationships between tables
C.
To enforce data integrity
D.
To improve query performance
Show solution
Solution
A primary key is used to uniquely identify each record in a table, ensuring that no two records have the same key value.
Correct Answer:
A
— To uniquely identify each record in a table
Learn More →
Q. What is the purpose of a rectifier in an electronic circuit?
A.
To amplify signals
B.
To convert AC to DC
C.
To filter noise
D.
To store energy
Show solution
Solution
A rectifier converts alternating current (AC) to direct current (DC) for use in electronic devices.
Correct Answer:
B
— To convert AC to DC
Learn More →
Showing 781 to 810 of 1509 (51 Pages)
