Q. What happens to the impedance of an RL circuit at high frequencies?
A.
It decreases
B.
It increases
C.
It remains constant
D.
It becomes zero
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Solution
At high frequencies, the impedance of an RL circuit increases due to the inductive reactance, which is proportional to frequency.
Correct Answer:
B
— It increases
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Q. What happens to the output of an operational amplifier if the non-inverting input is greater than the inverting input?
A.
Output is zero
B.
Output is positive saturation
C.
Output is negative saturation
D.
Output is equal to the input voltage
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Solution
If the non-inverting input is greater than the inverting input, the output of the operational amplifier goes to positive saturation.
Correct Answer:
B
— Output is positive saturation
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Q. What happens to the output voltage of an inverting op-amp when the input voltage increases?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
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Solution
In an inverting op-amp configuration, an increase in input voltage results in a decrease in output voltage.
Correct Answer:
B
— It decreases
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Q. What happens to the output voltage of an OP-AMP in a series-parallel circuit when the input exceeds the supply voltage?
A.
Output voltage increases indefinitely
B.
Output voltage saturates at the supply voltage
C.
Output voltage decreases
D.
Output voltage becomes zero
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Solution
When the input exceeds the supply voltage, the output voltage of an OP-AMP saturates at the supply voltage.
Correct Answer:
B
— Output voltage saturates at the supply voltage
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Q. What happens to the output voltage of an RC low-pass filter as frequency increases?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
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Solution
In an RC low-pass filter, the output voltage decreases as the frequency of the input signal increases.
Correct Answer:
B
— It decreases
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Q. What happens to the output voltage of an RC low-pass filter as the frequency increases?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
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Solution
In an RC low-pass filter, as the frequency increases, the output voltage decreases due to the filter's attenuation of high frequencies.
Correct Answer:
B
— It decreases
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Q. What happens to the source IP address of a packet when it passes through a NAT device?
A.
It remains unchanged
B.
It is replaced with the NAT device's public IP address
C.
It is replaced with a random IP address
D.
It is removed from the packet
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Solution
The source IP address of a packet is replaced with the NAT device's public IP address when it passes through.
Correct Answer:
B
— It is replaced with the NAT device's public IP address
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Q. What happens to the time response of an RC circuit as the resistance increases?
A.
Time response decreases
B.
Time response increases
C.
Time response remains constant
D.
Time response becomes negative
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Solution
As the resistance increases in an RC circuit, the time constant increases, leading to a slower time response.
Correct Answer:
B
— Time response increases
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Q. What happens to the total current in a series circuit when the resistance increases?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
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Solution
According to Ohm's law, if the resistance increases in a series circuit, the total current decreases.
Correct Answer:
B
— It decreases
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Q. What happens to the voltage across a diode in a series circuit when it is reverse-biased?
A.
It becomes zero
B.
It increases
C.
It decreases
D.
It becomes negative
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Solution
When a diode is reverse-biased, the voltage across it increases until it reaches the breakdown voltage, at which point it can conduct in reverse.
Correct Answer:
B
— It increases
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Q. What happens to the voltage in an AC circuit over time?
A.
It remains constant
B.
It increases linearly
C.
It varies sinusoidally
D.
It decreases exponentially
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Solution
In an AC circuit, the voltage varies sinusoidally over time.
Correct Answer:
C
— It varies sinusoidally
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Q. What happens when a BJT is in saturation?
A.
It acts as an open switch
B.
It acts as a closed switch
C.
It is in the active region
D.
It is in cutoff
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Solution
When a BJT is in saturation, it acts as a closed switch, allowing maximum current to flow from collector to emitter.
Correct Answer:
B
— It acts as a closed switch
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Q. What happens when a link in a network using STP fails?
A.
The network crashes
B.
STP recalculates the topology
C.
All devices are reset
D.
Traffic is rerouted immediately without delay
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Solution
When a link fails, STP recalculates the topology to find an alternate path and maintain a loop-free network.
Correct Answer:
B
— STP recalculates the topology
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Q. What happens when the trigger pin of a 555 timer is pulled low in monostable mode?
A.
The output goes high
B.
The output goes low
C.
The timer resets
D.
Nothing happens
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Solution
Pulling the trigger pin low causes the output to go high for the duration set by the timing components.
Correct Answer:
A
— The output goes high
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Q. What is a business rule in the context of an ER model?
A.
A guideline for database performance
B.
A constraint that defines how data can be created, stored, and modified
C.
A method for indexing data
D.
A type of transaction control
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Solution
A business rule defines constraints on how data can be created, stored, and modified in a database.
Correct Answer:
B
— A constraint that defines how data can be created, stored, and modified
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Q. What is a characteristic of a serial-in, serial-out (SISO) shift register?
A.
Data is input and output in parallel
B.
Data is input serially and output serially
C.
Data is input in parallel and output serially
D.
Data is stored permanently
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Solution
A SISO shift register allows data to be input serially and output serially.
Correct Answer:
B
— Data is input serially and output serially
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Q. What is a common application of MSI circuits?
A.
Microprocessors
B.
Basic resistors
C.
Capacitors
D.
Inductors
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Solution
MSI circuits are commonly used in microprocessors, where multiple logic functions are required.
Correct Answer:
A
— Microprocessors
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Q. What is a common challenge in concurrency control for data warehouses?
A.
High transaction volume
B.
Low data availability
C.
Complex data relationships
D.
Frequent schema changes
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Solution
High transaction volume can lead to challenges in concurrency control, especially when multiple users are querying large datasets simultaneously.
Correct Answer:
A
— High transaction volume
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Q. What is a common challenge in distributed databases?
A.
Data normalization
B.
Network latency
C.
Data encryption
D.
User authentication
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Solution
Network latency is a common challenge in distributed databases as it can affect the speed and efficiency of data access and transactions.
Correct Answer:
B
— Network latency
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Q. What is a common consequence of not normalizing a database?
A.
Increased data integrity
B.
Data redundancy
C.
Improved performance
D.
Simplified queries
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Solution
Not normalizing a database can lead to data redundancy, which can cause inconsistencies and anomalies.
Correct Answer:
B
— Data redundancy
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Q. What is a common issue faced during data warehousing?
A.
Data inconsistency
B.
High transaction volume
C.
Real-time data updates
D.
Limited data sources
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Solution
Data inconsistency is a common issue in data warehousing due to the integration of data from multiple sources.
Correct Answer:
A
— Data inconsistency
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Q. What is a common method for ensuring data consistency in Object-Oriented Databases during transactions?
A.
Two-phase commit protocol
B.
Normalization
C.
Data denormalization
D.
Flat file management
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Solution
The two-phase commit protocol is commonly used to ensure data consistency during transactions.
Correct Answer:
A
— Two-phase commit protocol
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Q. What is a common use case for Network Address Translation?
A.
Connecting to a VPN
B.
Hiding internal IP addresses from external networks
C.
Improving network speed
D.
Creating a mesh network
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Solution
NAT is commonly used to hide internal IP addresses from external networks, enhancing security.
Correct Answer:
B
— Hiding internal IP addresses from external networks
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Q. What is a decade counter?
A.
A counter that counts from 0 to 9
B.
A counter that counts from 0 to 15
C.
A counter that counts in binary
D.
A counter that counts in hexadecimal
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Solution
A decade counter counts from 0 to 9, which is a total of 10 states.
Correct Answer:
A
— A counter that counts from 0 to 9
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Q. What is a dimension table in a data warehouse?
A.
A table that stores transactional data
B.
A table that contains descriptive attributes
C.
A table that holds metadata
D.
A table that indexes data
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Solution
Dimension tables contain descriptive attributes that provide context to the facts stored in the fact tables.
Correct Answer:
B
— A table that contains descriptive attributes
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Q. What is a disadvantage of TTL logic families?
A.
High power consumption
B.
Low noise immunity
C.
High cost
D.
Low speed
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Solution
TTL logic families generally have higher power consumption compared to CMOS, making them less suitable for low-power applications.
Correct Answer:
A
— High power consumption
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Q. What is a disadvantage of using CMOS logic?
A.
High power consumption
B.
Slow switching speed
C.
Susceptibility to noise
D.
Complex fabrication process
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Solution
CMOS technology can be complex to fabricate due to the need for both n-type and p-type transistors.
Correct Answer:
D
— Complex fabrication process
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Q. What is a distributed database?
A.
A database that is stored on a single server
B.
A database that is spread across multiple locations
C.
A database that uses cloud storage
D.
A database that is only accessible via the internet
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Solution
A distributed database is a database that is spread across multiple locations, which can be on different servers or geographical locations.
Correct Answer:
B
— A database that is spread across multiple locations
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Q. What is a federated database system?
A.
A single database managed by one server
B.
A collection of autonomous databases that appear as one
C.
A database that only stores metadata
D.
A database that is only accessible through APIs
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Solution
A federated database system is a collection of autonomous databases that appear as one, allowing for distributed data access while maintaining individual database autonomy.
Correct Answer:
B
— A collection of autonomous databases that appear as one
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Q. What is a finite state machine (FSM) in digital design?
A.
A type of memory
B.
A model of computation representing states and transitions
C.
A method for data storage
D.
A programming language
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Solution
A finite state machine (FSM) is a model of computation that represents states and transitions based on input conditions.
Correct Answer:
B
— A model of computation representing states and transitions
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