Getting type information at runtime in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the type of the variable number.

C Sharp (C#)

int number = 5;
Type typeInfo = number.[1];

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AGetType()

Btypeof()

CGetType

DTypeOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using typeof() on an instance instead of a type.

Forgetting the parentheses after GetType.

In C#, GetType() is a method that returns the runtime type of an object.

2fill in blank

medium

Complete the code to print the name of the type of text.

C Sharp (C#)

string text = "hello";
Console.WriteLine(text.[1].Name);

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AGetType

Btypeof()

CGetType()

DTypeName()

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetType without parentheses.

Trying to use typeof() on a variable instead of a type.

GetType() returns a Type object, and Name gives the type's name as a string.

3fill in blank

hard

Fix the error in the code to get the type of obj and print its full name.

C Sharp (C#)

object obj = 10;
Type t = [1];
Console.WriteLine(t.FullName);

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Aobj.GetType()

BGetType(obj)

Ctypeof(obj)

Dobj.Type()

Attempts:

3 left

💡 Hint

Common Mistakes

Using typeof with a variable instead of a type.

Trying to call a non-existent method Type().

To get the runtime type of an object, call GetType() on the instance.

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, but only include words longer than 3 characters.

C Sharp (C#)

var words = new List<string> { "cat", "house", "tree", "a" };
var lengths = words.ToDictionary(word => word, word => word.[1])
    .Where(kv => kv.Value [2] 3)
    .ToDictionary(kv => kv.Key, kv => kv.Value);

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ALength

B>

C<

DCount

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > in the filter.

Using Count instead of Length for string length.

Length gets the length of a string, and filtering with > 3 keeps only longer words.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values only for entries where the value is greater than 10.

C Sharp (C#)

var data = new Dictionary<string, int> { {"a", 5}, {"b", 15}, {"c", 20} };
var result = data.Where(kv => kv.Value [1] 10)
    .ToDictionary(kv => kv.Key.[2](), kv => kv.[3]);

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A<

B>

CValue

DToUpper

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > in the filter.

Using Key instead of Value for dictionary values.

Filter values greater than 10, convert keys to uppercase with ToUpper(), and use Value for dictionary values.