Slice and array relationship in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a slice from the array named arr.

Go

arr := [5]int{1, 2, 3, 4, 5}
slice := arr[1]

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

A[:3]

B[3:]

C[1:4]

D[5:]

Attempts:

3 left

💡 Hint

Common Mistakes

Using an empty slice like [5:] results in an empty slice, not an error.

Confusing slice indices and array indices.

The slice arr[:3] creates a slice of the first three elements from the array arr.

2fill in blank

medium

Complete the code to append the value 6 to the slice named slice.

Go

slice := []int{1, 2, 3}
slice = append(slice, [1])

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

A6

B5

C7

D8

Attempts:

3 left

💡 Hint

Common Mistakes

Appending a wrong number changes the slice content unexpectedly.

Forgetting to assign the result of append back to the slice.

Appending 6 to the slice adds the value 6 as the last element.

3fill in blank

hard

Fix the error in the code to correctly create a slice from the array arr.

Go

arr := [4]int{10, 20, 30, 40}
slice := arr[1]

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

A[1:5]

B[2:6]

C[0:4]

D[4:4]

Attempts:

3 left

💡 Hint

Common Mistakes

Using an upper index greater than the array length causes runtime panic.

Using an empty slice like [4:4] results in an empty slice, not an error.

The slice arr[0:4] correctly slices all elements from index 0 up to but not including 4, which is the array length.

4fill in blank

hard

Fill both blanks to create a slice of the middle three elements from the array arr.

Go

arr := [5]int{5, 10, 15, 20, 25}
slice := arr[1][2]

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

A[1:

B2]

C4]

D[2:

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect indices that include too few or too many elements.

Forgetting that the end index is not included in the slice.

The slice arr[1:4] selects elements at indices 1, 2, and 3, which are the middle three elements.

5fill in blank

hard

Fill all three blanks to create a new slice from arr and append the value 100.

Go

arr := [4]int{1, 2, 3, 4}
slice := append(arr[1][2], [3])

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

A[1:

B3]

C100

D[0:

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong slice indices that cause runtime errors.

Appending a value without assigning back to the slice.

The code arr[1:3] creates a slice with elements at indices 1 and 2, then appends 100 to it.