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Questions and Answers
Structs are value types typically used to encapsulate small groups of related ______.
Structs are value types typically used to encapsulate small groups of related ______.
variables
Structs CAN contain methods, properties, ______, and so on.
Structs CAN contain methods, properties, ______, and so on.
indexers
Unlike classes, structs can be instantiated without using the ______ keyword.
Unlike classes, structs can be instantiated without using the ______ keyword.
new
Enums contain a set of named constants called ______ list.
Enums contain a set of named constants called ______ list.
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Values in the enumeration list can be referred using the ______ syntax.
Values in the enumeration list can be referred using the ______ syntax.
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Structs CANNOT contain default ______.
Structs CANNOT contain default ______.
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In order to assign Enum values to ______, you have to specify the type in parentheses.
In order to assign Enum values to ______, you have to specify the type in parentheses.
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Index values for elements within the enumeration list can also be manually assigned; however, the element value of the next item will be ______ increment of the previous value.
Index values for elements within the enumeration list can also be manually assigned; however, the element value of the next item will be ______ increment of the previous value.
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Exceptions are problems, mostly errors, that occur during program ______.
Exceptions are problems, mostly errors, that occur during program ______.
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The process of coding a program to provide solutions to an exception is called ______.
The process of coding a program to provide solutions to an exception is called ______.
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In C#, the ______ block contains code that might generate an expected exception.
In C#, the ______ block contains code that might generate an expected exception.
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The ______ block executes relevant code for the captured exception.
The ______ block executes relevant code for the captured exception.
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A single try block can contain multiple ______ blocks that handle different exceptions.
A single try block can contain multiple ______ blocks that handle different exceptions.
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OutOfMemoryException refers to situations where there is not enough ______ to continue the program's execution.
OutOfMemoryException refers to situations where there is not enough ______ to continue the program's execution.
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The finally block is an optional block that can be used after the ______ block declarations.
The finally block is an optional block that can be used after the ______ block declarations.
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The ______ block allows a program to continue running without problems in case of an error.
The ______ block allows a program to continue running without problems in case of an error.
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The ______ class is one of the various classes of the System.IO namespace.
The ______ class is one of the various classes of the System.IO namespace.
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The WriteAllText() method creates a file and writes content to it, but if the file already exists, it is ______.
The WriteAllText() method creates a file and writes content to it, but if the file already exists, it is ______.
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The AppendAllText() method usually adds text at the ______ of the file's contents.
The AppendAllText() method usually adds text at the ______ of the file's contents.
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The ______() method checks whether a file exists from the specified location.
The ______() method checks whether a file exists from the specified location.
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The Create() method creates a file at a specified ______, directory, or path.
The Create() method creates a file at a specified ______, directory, or path.
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The Delete() method ______ a file from the specified location.
The Delete() method ______ a file from the specified location.
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To copy a file, the Copy() method takes the first parameter as the source location and the second as the ______ location.
To copy a file, the Copy() method takes the first parameter as the source location and the second as the ______ location.
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The Move() method moves a file to a new ______, directory, or path.
The Move() method moves a file to a new ______, directory, or path.
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Study Notes
Structs, Enums, Exceptions, and Files
- Structs are value types used to group related variables (e.g., rectangle coordinates)
- Structs use the
structkeyword - Struct syntax is similar to classes but more limited
- Structs can contain methods, properties, indexers, etc.
- Structs cannot have default constructors, but can have parameterized constructors
- Structs are instantiated without using the
newkeyword, unlike classes - Classes are for complex behavior and data that changes, structs are for simple data structures that don't change after creation
- Structs are better for simpler data sets
Enums
- Enums are programming constructs with named constants (enumerators)
- Enums are similar to arrays but contain constant values
- Enums use the
enumkeyword - Enum values are accessed using dot syntax (e.g.,
MyEnum.Value) - Enum values can be manually assigned, increasing by one from the previous value
- Values are assigned to variables through type specification, in parentheses (e.g.
int)
Exception Handling
- Exceptions are problems, errors, or resource limitations during program execution
- Exception handling prevents program crashes
-
try-catchstatements handle exceptions -
tryblock: code that may throw an exception -
catchblock: code executed if an exception occurs (specific exception type can be defined) - Multiple
catchblocks can handle different exception types - Common exception types:
FileNotFoundException,FormatException,IndexOutOfRangeException,InvalidOperationException,OutOfMemoryException -
finallyblock: executes regardless of exceptions (often used for cleanup, like closing files)
Working with Files
- The
Fileclass inSystem.IOhandles file operations (creating, deleting, reading, writing) -
WriteAllText()method writes content to a file, overwriting existing content -
ReadAllText()method reads the entire content of a file -
AppendAllText()method adds content to the end of a file -
Create(),Delete(),Exists(),Copy(), andMove()methods perform various file operations
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Description
This quiz covers the fundamental concepts of structs and enums in programming. Learn how to define and use these constructs, understand their differences from classes, and grasp the significance of using value types. Test your knowledge with questions that explore syntax, behavior, and practical applications.
