ZINCRBY for score updates in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to increase the score of member 'player1' by 10 in the sorted set 'game_scores'.

Redis

ZINCRBY game_scores [1] player1

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

AINCRBY

Bplayer1

Cgame_scores

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the member name where the increment should be.

Using the key name instead of the increment.

The ZINCRBY command increases the score of a member by the specified increment. Here, 10 is the increment.

2fill in blank

medium

Complete the code to increase the score of member 'user42' by 5 in the sorted set 'leaderboard'.

Redis

ZINCRBY [1] 5 user42

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

A5

Bleaderboard

Cuser42

Dscoreboard

Attempts:

3 left

💡 Hint

Common Mistakes

Using the member name instead of the key name.

Confusing the increment value with the key.

The first argument after ZINCRBY is the key name of the sorted set, here 'leaderboard'.

3fill in blank

hard

Fix the error in the command to increase 'memberX' score by 3 in 'scores'.

Redis

ZINCRBY scores [1] memberX

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

AmemberX

Bscores

C3

DINCR

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the member name where the increment should be.

Using a keyword instead of a number.

The increment must be a number, here 3, not the member name or other keywords.

4fill in blank

hard

Fill both blanks to increase 'alice' score by 7 in the sorted set 'players'.

Redis

ZINCRBY [1] [2] alice

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

Aplayers

B7

C7.0

Dplayer_scores

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the key and increment.

Using a float number instead of an integer.

The first blank is the key name 'players'. The second blank is the increment '7'.

5fill in blank

hard

Fill all three blanks to increase the score of 'bob' by 4.5 in the sorted set 'game_rankings'.

Redis

ZINCRBY [1] [2] [3]

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

Agame_rankings

B4.5

Cbob

Drankings

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of arguments.

Using an integer instead of a decimal when decimal is needed.

The command syntax is: ZINCRBY key increment member. Here, key='game_rankings', increment='4.5', member='bob'.