Zip operation in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to zip two integer arrays and print the pairs.

C Sharp (C#)

var numbers = new[] {1, 2, 3};
var words = new[] {"one", "two", "three"};
var zipped = numbers.[1](words, (n, w) => (n, w));
foreach (var (n, w) in zipped)
{
    Console.WriteLine($"{n} - {w}");
}

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AZip

BSelect

CWhere

DOrderBy

Attempts:

3 left

💡 Hint

Common Mistakes

Using Select instead of Zip will not combine two sequences.

Where filters elements but does not combine sequences.

The Zip method combines two sequences element-wise into pairs.

2fill in blank

medium

Complete the code to zip two lists and create a dictionary from the pairs.

C Sharp (C#)

var keys = new List<string> {"a", "b", "c"};
var values = new List<int> {1, 2, 3};
var dict = keys.[1](values, (k, v) => new { k, v })
               .ToDictionary(x => x.k, x => x.v);

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AGroupBy

BZip

CSelect

DOrderBy

Attempts:

3 left

💡 Hint

Common Mistakes

Using Select only projects one sequence, not combining two.

GroupBy groups elements but does not pair two sequences.

Zip pairs elements from two sequences, which can then be converted to a dictionary.

3fill in blank

hard

Fix the error in the code to correctly zip two arrays and print the sum of pairs.

C Sharp (C#)

int[] arr1 = {1, 2, 3};
int[] arr2 = {4, 5, 6};
var result = arr1.[1](arr2, (x, y) => x + y);
foreach (var sum in result)
{
    Console.WriteLine(sum);
}

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AJoin

BSelect

CConcat

DZip

Attempts:

3 left

💡 Hint

Common Mistakes

Using Select only works on one sequence.

Concat joins sequences end to end, not element-wise.

Zip combines two sequences element-wise, allowing you to sum pairs.

4fill in blank

hard

Fill both blanks to create a zipped list of tuples from two arrays and print them.

C Sharp (C#)

string[] fruits = {"apple", "banana", "cherry"};
int[] counts = {5, 3, 7};
var zipped = fruits.[1](counts, ([2] f, c) => (f, c));
foreach (var (f, c) in zipped)
{
    Console.WriteLine($"{f} has {c} items");
}

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AZip

BSelect

Cstring

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using Select instead of Zip will not combine sequences.

Using 'var' instead of 'string' in tuple element type causes errors.

Use Zip to combine sequences and specify tuple element types explicitly with 'string'.

5fill in blank

hard

Fill all three blanks to zip two arrays, filter pairs where sum is greater than 5, and create a list of sums.

C Sharp (C#)

int[] a = {1, 3, 5};
int[] b = {2, 4, 6};
var sums = a.[1](b, (x, y) => x + y)
            .Where(sum => sum [2] 5)
            .ToList();
Console.WriteLine(sums.[3]());

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AZip

B>

CSum

DSelect

Attempts:

3 left

💡 Hint

Common Mistakes

Using Select instead of Zip for pairing.

Using '<' instead of '>' in the filter condition.

Using Count() instead of Sum() to get total.

Zip pairs elements, Where filters sums greater than 5, and Sum calculates total.