Why operators matter in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two numbers and print the result.

C Sharp (C#)

int a = 5;
int b = 3;
int sum = a [1] b;
Console.WriteLine(sum);

Drag options to blanks, or click blank then click option'

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction instead of addition.

Using multiplication or division by mistake.

The plus operator + adds two numbers together.

2fill in blank

medium

Complete the code to check if a number is greater than 10.

C Sharp (C#)

int number = 15;
if (number [1] 10)
{
    Console.WriteLine("Greater than 10");
}

Drag options to blanks, or click blank then click option'

A<=

B==

C<

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator instead.

Using equality operator instead of comparison.

The greater than operator > checks if the left value is bigger than the right.

3fill in blank

hard

Fix the error in the code to multiply two numbers.

C Sharp (C#)

int x = 4;
int y = 6;
int product = x [1] y;
Console.WriteLine(product);

Drag options to blanks, or click blank then click option'

A/

B*

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication.

Using division operator by mistake.

The multiplication operator * multiplies two numbers.

4fill in blank

hard

Fill both blanks to create a dictionary with word lengths for words longer than 3 letters.

C Sharp (C#)

var words = new List<string> { "apple", "cat", "banana", "dog" };
var lengths = words.Where(word => word.Length [1] 3)
                   .ToDictionary(word => word, word => word.Length [2] 1);

Drag options to blanks, or click blank then click option'

A>

B<

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator for filtering.

Adding instead of subtracting in the dictionary value.

The first blank uses > to filter words longer than 3 letters.

The second blank uses - to subtract 1 from the length.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and their lengths for words with length greater than 4.

C Sharp (C#)

var words = new List<string> { "tree", "house", "car", "elephant" };
var result = words.Where(w => w.Length [1] 4)
                  .ToDictionary(w => w.[2](), w => w.Length [3] 0);

Drag options to blanks, or click blank then click option'

A>

BLength

C+

DToUpper

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator for filtering.

Using property name instead of method call for uppercase.

Using subtraction instead of addition in length calculation.

The first blank uses > to filter words longer than 4 letters.

The second blank uses ToUpper to make keys uppercase.

The third blank uses + to add 0 to the length (keeps length unchanged).