Q. In an ER diagram, what does a diamond shape represent?
A.
Entity
B.
Attribute
C.
Relationship
D.
Weak entity
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Solution
In an ER diagram, a diamond shape represents a relationship between entities.
Correct Answer:
C
— Relationship
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Q. In an ER model, how is a one-to-many relationship typically represented?
A.
With a single line connecting two entities
B.
With a crow's foot notation
C.
With a dashed line
D.
With a double line
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Solution
A one-to-many relationship is typically represented with a crow's foot notation.
Correct Answer:
B
— With a crow's foot notation
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Q. In an ER model, what does a circle represent?
A.
An entity
B.
An attribute
C.
A relationship
D.
A weak entity
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Solution
A circle in an ER model represents an attribute of an entity.
Correct Answer:
B
— An attribute
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Q. In an ER model, what does a diamond shape represent?
A.
Entity
B.
Attribute
C.
Relationship
D.
Weak Entity
Show solution
Solution
In an ER model, a diamond shape represents a relationship between entities.
Correct Answer:
C
— Relationship
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Q. In an ER model, what does a solid line between two entities indicate?
A.
A weak relationship
B.
A strong relationship
C.
A one-to-many relationship
D.
A many-to-many relationship
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Solution
A solid line between two entities indicates a strong relationship in an ER model.
Correct Answer:
B
— A strong relationship
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Q. In an ER model, what does a solid line connecting two entities represent?
A.
A weak relationship
B.
A strong relationship
C.
An attribute
D.
A foreign key constraint
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Solution
A solid line connecting two entities in an ER model represents a strong relationship.
Correct Answer:
B
— A strong relationship
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Q. In an ER model, what does a solid line represent?
A.
A weak relationship
B.
A strong relationship
C.
An attribute
D.
A derived attribute
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Solution
A solid line in an ER model represents a strong relationship between entities.
Correct Answer:
B
— A strong relationship
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Q. In an ER model, what does an entity represent?
A.
A relationship
B.
A table
C.
A column
D.
A constraint
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Solution
In an Entity-Relationship (ER) model, an entity represents a table in the database.
Correct Answer:
B
— A table
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Q. In an ER model, what is an attribute?
A.
A relationship between entities
B.
A property or characteristic of an entity
C.
A unique identifier for an entity
D.
A type of database operation
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Solution
An attribute is a property or characteristic that describes an entity in an ER model.
Correct Answer:
B
— A property or characteristic of an entity
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Q. In an integrated circuit, what does the term 'die' refer to?
A.
The entire circuit board
B.
The individual chip of silicon
C.
The packaging of the IC
D.
The power supply
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Solution
A 'die' refers to the individual piece of silicon that contains the integrated circuit.
Correct Answer:
B
— The individual chip of silicon
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Q. In an inverting amplifier, if the feedback resistor is 10k Ohm and the input resistor is 1k Ohm, what is the gain?
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Solution
The gain of an inverting amplifier is given by -Rf/Rin, which in this case is -10.
Correct Answer:
A
— -10
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Q. In an MSI circuit, what is the typical number of gates integrated?
A.
1-10
B.
10-100
C.
100-1000
D.
1000-10000
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Solution
MSI circuits typically integrate between 10 to 100 gates on a single chip.
Correct Answer:
B
— 10-100
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Q. In an op-amp configured as a voltage follower in a series circuit, what is the output voltage compared to the input voltage?
A.
Higher than the input voltage
B.
Lower than the input voltage
C.
Equal to the input voltage
D.
Unpredictable
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Solution
An op-amp in a voltage follower configuration outputs a voltage that is equal to the input voltage.
Correct Answer:
C
— Equal to the input voltage
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Q. In an op-amp configured as a voltage follower in a series circuit, what is the output voltage relative to the input voltage?
A.
Higher than the input voltage
B.
Lower than the input voltage
C.
Equal to the input voltage
D.
Inverted compared to the input voltage
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Solution
An op-amp in a voltage follower configuration outputs a voltage that is equal to the input voltage, providing high input impedance and low output impedance.
Correct Answer:
C
— Equal to the input voltage
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Q. In an operational amplifier, what does the term 'common-mode rejection ratio' (CMRR) refer to?
A.
The ability to reject noise
B.
The ability to reject common-mode signals
C.
The ratio of output to input voltage
D.
The gain of the amplifier
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Solution
Common-mode rejection ratio (CMRR) refers to the ability of an operational amplifier to reject common-mode signals.
Correct Answer:
B
— The ability to reject common-mode signals
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Q. In an RC circuit, what does the time constant (τ) represent?
A.
The time taken to charge or discharge the capacitor
B.
The maximum voltage across the capacitor
C.
The resistance of the circuit
D.
The frequency of oscillation
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Solution
The time constant (τ) in an RC circuit is the time taken for the capacitor to charge to about 63.2% of the maximum voltage.
Correct Answer:
A
— The time taken to charge or discharge the capacitor
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Q. In an RL circuit, what does the time constant represent?
A.
The time to charge the inductor
B.
The time to discharge the inductor
C.
The time to reach 63.2% of final value
D.
The time to reach 100% of final value
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Solution
In an RL circuit, the time constant (τ) represents the time it takes for the current to reach approximately 63.2% of its final value.
Correct Answer:
C
— The time to reach 63.2% of final value
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Q. In an RLC series circuit, what is the effect of increasing the resistance on the bandwidth?
A.
Bandwidth increases
B.
Bandwidth decreases
C.
Bandwidth remains the same
D.
Bandwidth becomes zero
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Solution
Increasing the resistance in an RLC series circuit decreases the bandwidth due to increased damping.
Correct Answer:
B
— Bandwidth decreases
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Q. In an SR Flip-Flop, what condition is considered invalid?
A.
S=0, R=0
B.
S=1, R=0
C.
S=0, R=1
D.
S=1, R=1
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Solution
The condition S=1 and R=1 is invalid for an SR Flip-Flop as it leads to an indeterminate state.
Correct Answer:
D
— S=1, R=1
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Q. In an SR flip-flop, what condition leads to an invalid state?
A.
S=0, R=0
B.
S=1, R=0
C.
S=0, R=1
D.
S=1, R=1
Show solution
Solution
The condition S=1 and R=1 leads to an invalid state in an SR flip-flop, as it creates an ambiguous output.
Correct Answer:
D
— S=1, R=1
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Q. In astable mode, how many output states does a 555 timer have?
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Solution
In astable mode, the 555 timer continuously oscillates between two output states: high and low.
Correct Answer:
B
— 2
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Q. In database architecture, what is the purpose of a data dictionary?
A.
To store user data
B.
To define the structure of the database
C.
To manage transactions
D.
To optimize queries
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Solution
A data dictionary defines the structure of the database, including tables, fields, and relationships.
Correct Answer:
B
— To define the structure of the database
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Q. In database transactions, what does ACID stand for?
A.
Atomicity, Consistency, Isolation, Durability
B.
Atomicity, Concurrency, Integrity, Durability
C.
Atomicity, Consistency, Isolation, Data
D.
Atomicity, Consistency, Isolation, Dependency
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Solution
ACID stands for Atomicity, Consistency, Isolation, and Durability, which are the properties that guarantee reliable transactions.
Correct Answer:
A
— Atomicity, Consistency, Isolation, Durability
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Q. In DBMS architecture, what does the term 'data independence' refer to?
A.
The ability to change the data structure without affecting the application
B.
The separation of data and application logic
C.
The ability to access data from multiple sources
D.
The use of multiple databases
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Solution
Data independence refers to the ability to change the data structure without affecting the application that uses the data.
Correct Answer:
A
— The ability to change the data structure without affecting the application
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Q. In DBMS architecture, what does the term 'physical data independence' refer to?
A.
The ability to change the logical schema without changing the physical schema
B.
The ability to change the physical storage without affecting the logical schema
C.
The ability to access data from multiple sources
D.
The ability to enforce security measures
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Solution
Physical data independence refers to the ability to change the physical storage of data without affecting the logical schema.
Correct Answer:
B
— The ability to change the physical storage without affecting the logical schema
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Q. In DBMS architecture, what is the purpose of the data abstraction layer?
A.
To manage user access
B.
To provide a user interface
C.
To separate physical storage from logical data structures
D.
To optimize query performance
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Solution
The data abstraction layer separates physical storage from logical data structures, allowing users to interact with data without needing to know how it is stored.
Correct Answer:
C
— To separate physical storage from logical data structures
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Q. In digital circuits, what does the term 'logic level' refer to?
A.
Voltage levels
B.
Frequency levels
C.
Temperature levels
D.
Current levels
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Solution
Logic level refers to the voltage levels that represent binary values (0 and 1) in digital circuits.
Correct Answer:
A
— Voltage levels
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Q. In digital circuits, what does the term 'two's complement' refer to?
A.
A method for binary addition
B.
A method for binary subtraction
C.
A way to represent negative numbers
D.
A type of logic gate
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Solution
Two's complement is a method used to represent negative numbers in binary.
Correct Answer:
C
— A way to represent negative numbers
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Q. In digital design, what does FPGA stand for?
A.
Field Programmable Gate Array
B.
Fast Programmable Gate Array
C.
Field Programmable General Array
D.
Fixed Programmable Gate Array
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Solution
FPGA stands for Field Programmable Gate Array, which can be configured by the user after manufacturing.
Correct Answer:
A
— Field Programmable Gate Array
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Q. In digital signal processing, what is aliasing?
A.
Loss of data during transmission
B.
Distortion that occurs when a signal is undersampled
C.
The process of converting digital to analog
D.
A method of noise reduction
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Solution
Aliasing occurs when a signal is undersampled, causing different signals to become indistinguishable from one another in the sampled data.
Correct Answer:
B
— Distortion that occurs when a signal is undersampled
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