Q. Which logic gate is equivalent to an inverter followed by an AND gate?
-
A.
NAND gate
-
B.
NOR gate
-
C.
AND gate
-
D.
OR gate
Solution
An inverter followed by an AND gate is equivalent to a NAND gate.
Correct Answer:
A
— NAND gate
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Q. Which logic gate is represented by a diode in series with a resistor?
-
A.
AND gate
-
B.
OR gate
-
C.
NAND gate
-
D.
NOR gate
Solution
A diode in series with a resistor can represent an AND gate, as it allows current to flow only when both inputs are high.
Correct Answer:
A
— AND gate
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Q. Which logic gate is represented by the expression A + B?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
XOR
Solution
The expression A + B represents an OR gate.
Correct Answer:
B
— OR
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Q. Which logic gate is used to implement the carry function in binary addition?
-
A.
AND
-
B.
OR
-
C.
XOR
-
D.
NOT
Solution
The AND gate is used to generate the carry in binary addition.
Correct Answer:
A
— AND
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Q. Which logic gate outputs 1 when at least one input is 1?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
NAND
Solution
An OR gate outputs 1 when at least one of its inputs is 1.
Correct Answer:
B
— OR
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Q. Which logic gate outputs true if at least one input is true?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
NAND
Solution
An OR gate outputs true if at least one of its inputs is true.
Correct Answer:
B
— OR
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Q. Which logic gate outputs true only when at least one input is true?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
NAND
Solution
An OR gate outputs true (1) when at least one of its inputs is true (1).
Correct Answer:
B
— OR
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Q. Which logic gate outputs true only when both inputs are true?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
XOR
Solution
The AND gate outputs true only when both inputs are true.
Correct Answer:
A
— AND
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Q. Which logic gate produces a true output only when both inputs are different?
-
A.
AND
-
B.
OR
-
C.
XOR
-
D.
NOR
Solution
An XOR gate outputs true (1) only when the inputs are different.
Correct Answer:
C
— XOR
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Q. Which method is used to load XML data into a DataSet in ADO.NET?
-
A.
LoadXml()
-
B.
ReadXml()
-
C.
ImportXml()
-
D.
FillXml()
Solution
The ReadXml() method is used to load XML data into a DataSet.
Correct Answer:
B
— ReadXml()
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Q. Which normal form addresses transitive dependencies?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Third Normal Form (3NF) addresses transitive dependencies by ensuring that non-key attributes are not dependent on other non-key attributes.
Correct Answer:
C
— Third Normal Form (3NF)
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Q. Which normal form eliminates transitive dependencies?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
The Third Normal Form (3NF) eliminates transitive dependencies in a relational database.
Correct Answer:
C
— Third Normal Form (3NF)
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Q. Which normal form is achieved when a relation is in 3NF and every determinant is a candidate key?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Boyce-Codd Normal Form (BCNF) is achieved when a relation is in 3NF and every determinant is a candidate key.
Correct Answer:
D
— Boyce-Codd Normal Form (BCNF)
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Q. Which normal form is achieved when a table is in 3NF and every determinant is a candidate key?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Boyce-Codd Normal Form (BCNF) is achieved when a table is in 3NF and every determinant is a candidate key.
Correct Answer:
D
— Boyce-Codd Normal Form (BCNF)
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Q. Which normal form requires that a relation is in 1NF and has no partial dependencies?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Second Normal Form (2NF) requires that a relation is in 1NF and has no partial dependencies on a composite primary key.
Correct Answer:
B
— Second Normal Form (2NF)
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Q. Which normal form requires that a relation is in Second Normal Form and has no transitive dependencies?
-
A.
First Normal Form
-
B.
Second Normal Form
-
C.
Third Normal Form
-
D.
Boyce-Codd Normal Form
Solution
Third Normal Form (3NF) requires that a relation is in Second Normal Form and has no transitive dependencies.
Correct Answer:
C
— Third Normal Form
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Q. Which normal form requires that a table is in 1NF and all non-key attributes are fully functionally dependent on the primary key?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Second Normal Form (2NF) requires that all non-key attributes are fully functionally dependent on the primary key.
Correct Answer:
B
— Second Normal Form (2NF)
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Q. Which normal form requires that a table is in 1NF and has no partial dependencies?
-
A.
First Normal Form (1NF)
-
B.
Second Normal Form (2NF)
-
C.
Third Normal Form (3NF)
-
D.
Boyce-Codd Normal Form (BCNF)
Solution
Second Normal Form (2NF) requires that a table is in 1NF and has no partial dependencies.
Correct Answer:
B
— Second Normal Form (2NF)
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Q. Which normalization form eliminates transitive dependencies?
-
A.
First Normal Form
-
B.
Second Normal Form
-
C.
Third Normal Form
-
D.
Boyce-Codd Normal Form
Solution
Third Normal Form (3NF) eliminates transitive dependencies.
Correct Answer:
C
— Third Normal Form
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Q. Which number system is primarily used in digital electronics?
-
A.
Decimal
-
B.
Binary
-
C.
Octal
-
D.
Hexadecimal
Solution
The binary number system is primarily used in digital electronics as it represents data in two states, 0 and 1.
Correct Answer:
B
— Binary
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Q. Which number system is used in digital electronics for representing data?
-
A.
Decimal
-
B.
Binary
-
C.
Octal
-
D.
Hexadecimal
Solution
The binary number system is used in digital electronics for representing data.
Correct Answer:
B
— Binary
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Q. Which number system uses base 16?
-
A.
Binary
-
B.
Decimal
-
C.
Octal
-
D.
Hexadecimal
Solution
The hexadecimal number system uses base 16.
Correct Answer:
D
— Hexadecimal
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Q. Which of the following best describes a 'weak entity' in an ER model?
-
A.
An entity that cannot exist without a strong entity
-
B.
An entity with no attributes
-
C.
An entity that has a composite key
-
D.
An entity that is not related to any other entity
Solution
A weak entity is an entity that cannot exist without a strong entity and relies on it for its identification.
Correct Answer:
A
— An entity that cannot exist without a strong entity
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Q. Which of the following best describes a business rule?
-
A.
A guideline for database design
-
B.
A constraint on data values
-
C.
A policy that governs data usage
-
D.
All of the above
Solution
A business rule can be a guideline, a constraint, or a policy regarding data.
Correct Answer:
D
— All of the above
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Q. Which of the following best describes a data mart?
-
A.
A large-scale data warehouse
-
B.
A subset of a data warehouse focused on a specific business area
-
C.
A type of database management system
-
D.
A method for data extraction
Solution
A data mart is a smaller, more focused version of a data warehouse, designed to serve the needs of a specific business area.
Correct Answer:
B
— A subset of a data warehouse focused on a specific business area
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Q. Which of the following best describes a dimension table?
-
A.
Contains foreign keys
-
B.
Stores detailed transactional data
-
C.
Provides context to fact data
-
D.
Is always normalized
Solution
Dimension tables provide context to fact data by containing descriptive attributes.
Correct Answer:
C
— Provides context to fact data
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Q. Which of the following best describes a GAL?
-
A.
A type of FPGA
-
B.
A type of CPLD
-
C.
A programmable logic device with a fixed architecture
-
D.
A microcontroller
Solution
A GAL (Generic Array Logic) is a programmable logic device with a fixed architecture, allowing for specific logic functions to be programmed.
Correct Answer:
C
— A programmable logic device with a fixed architecture
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Q. Which of the following best describes a many-to-many relationship?
-
A.
One entity can relate to many instances of another entity
-
B.
One entity can relate to only one instance of another entity
-
C.
Many instances of one entity can relate to many instances of another entity
-
D.
No relationship exists between the entities
Solution
A many-to-many relationship allows many instances of one entity to relate to many instances of another entity.
Correct Answer:
C
— Many instances of one entity can relate to many instances of another entity
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Q. Which of the following best describes a microcontroller?
-
A.
A microprocessor with additional peripherals integrated
-
B.
A type of memory used in computers
-
C.
A high-performance computing unit
-
D.
A standalone processing unit without any peripherals
Solution
A microcontroller is essentially a microprocessor with additional peripherals integrated, designed for specific control applications.
Correct Answer:
A
— A microprocessor with additional peripherals integrated
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Q. Which of the following best describes a primary key?
-
A.
A unique identifier for a record in a table
-
B.
A foreign key that links to another table
-
C.
An attribute that can have null values
-
D.
A composite of multiple attributes
Solution
A primary key is a unique identifier for a record in a table.
Correct Answer:
A
— A unique identifier for a record in a table
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