Hash tables (dictionaries) in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an empty hash table in PowerShell.

PowerShell

$hashTable = [1]

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

A[]

B@{}

C{}

D()

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets [] which create arrays, not hash tables.

Using just curly braces {} which is not valid for hash tables in PowerShell.

In PowerShell, an empty hash table is created using @{}.

2fill in blank

medium

Complete the code to add a key-value pair 'Name' = 'Alice' to the hash table.

PowerShell

$hashTable = @{}
$hashTable.[1] = 'Alice'

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

AKey

BAdd

CName

DValue

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use 'Add' as a property name instead of the key.

Using 'Key' or 'Value' which are not valid property names.

To add a key-value pair, use the key name as a property: $hashTable.Name = 'Alice'.

3fill in blank

hard

Fix the error in the code to retrieve the value for key 'Age' from the hash table.

PowerShell

$age = $hashTable[1]'Age'

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

A['Age']

B.Age

C('Age')

D[Age]

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation with quotes which causes errors.

Using parentheses which is invalid syntax here.

To access a hash table value by key, use square brackets with the key as a string: $hashTable['Age'].

4fill in blank

hard

Fill both blanks to create a hash table with keys 'City' and 'Country' and values 'Paris' and 'France'.

PowerShell

$location = @[1] = '[2]'}

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

A'City'

B'Country'

CParis

DFrance

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the key string.

Using commas instead of '=' to separate key and value.

To create a hash table with one key-value pair, use @{'City' = 'Paris'}. Here we fill the first blank with the key and the second with the value.

5fill in blank

hard

Fill all three blanks to create a hash table with keys 'Fruit' and 'Color' and values 'Apple' and 'Red'.

PowerShell

$fruitInfo = @[1] = '[2]'; [3] = 'Red'}

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

A'Fruit'

BApple

C'Color'

D'Red'

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas instead of semicolons to separate pairs.

Not quoting the keys.

The hash table has two key-value pairs separated by semicolons. The first key is 'Fruit' with value 'Apple', the second key is 'Color' with value 'Red'.