Hash slots distribution in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to get the hash slot for a key.

Redis

CLUSTER KEYSLOT [1]

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

A1000

Buser:1000

C"user:1000"

DKEYSLOT

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the key name causes an error.

Using a number instead of the key name.

The CLUSTER KEYSLOT command requires the key name without quotes to return its hash slot.

2fill in blank

medium

Complete the command to get all keys in a specific hash slot.

Redis

CLUSTER GETKEYSINSLOT [1] 5

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

A0

B5000

C1000

Dslot

Attempts:

3 left

💡 Hint

Common Mistakes

Using a key name instead of a slot number.

Using a slot number outside the valid range.

The command CLUSTER GETKEYSINSLOT requires the slot number as the first argument. Slot 0 is a valid slot number.

3fill in blank

hard

Fix the error in the command to get the hash slot for a key.

Redis

CLUSTER KEYSLOT [1]

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

Auser:123

BKEYSLOT

C123

D"user:123"

Attempts:

3 left

💡 Hint

Common Mistakes

Including quotes around the key name.

Using a number instead of the key name.

The CLUSTER KEYSLOT command expects the key name without quotes. Using quotes causes a syntax error.

4fill in blank

hard

Fill both blanks to get keys from slot 1000 with a count of 3.

Redis

CLUSTER GETKEYSINSLOT [1] [2]

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

A1000

B3

C5

Dslot

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the slot number and count.

Using invalid slot numbers or counts.

The first argument is the slot number (1000), and the second is the count of keys to return (3).

5fill in blank

hard

Fill all three blanks to get the hash slot for key 'session:42' and then get 2 keys from that slot.

Redis

SET key session:42
SLOT = CLUSTER KEYSLOT [1]
CLUSTER GETKEYSINSLOT [2] [3]

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

Asession:42

BSLOT

C2

Dsession42

Attempts:

3 left

💡 Hint

Common Mistakes

Using an incorrect key name.

Using a literal slot number instead of the variable.

Using wrong count number.

First, provide the key name 'session:42' to get its slot. Then use the variable SLOT to get keys from that slot with count 2.