Why data modeling differs in Redis - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a string value in Redis.

Redis

SET mykey [1]

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

A123

B"Hello"

CHello

Dnil

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around string values causes errors.

Using nil which is not a valid value.

In Redis, string values do not need to be enclosed in quotes when setting them as literals in commands.

2fill in blank

medium

Complete the code to add a member to a Redis set.

Redis

SADD myset [1]

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

Amyvalue

B123

C"myvalue"

Dnil

Attempts:

3 left

💡 Hint

Common Mistakes

Adding quoted strings unnecessarily.

Using nil which is not a valid member.

Redis commands accept string arguments without quotes unless they contain spaces or special characters.

3fill in blank

hard

Fix the error in the command to get a hash field value.

Redis

HGET myhash [1]

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

Afield1

Bnil

C1

D"field1"

Attempts:

3 left

💡 Hint

Common Mistakes

Using quoted field names unnecessarily.

Using numeric or nil values incorrectly.

Hash field names in Redis commands do not need to be quoted strings unless they contain spaces or special characters.

4fill in blank

hard

Fill both blanks to create a sorted set with a member and score.

Redis

ZADD myzset [1] [2]

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

A10

B"member1"

Cmember1

Dscore

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping score and member order.

Quoting the member string unnecessarily.

ZADD requires the score first (a number), then the member (a string without quotes unless it contains spaces).

5fill in blank

hard

Fill all three blanks to create a Redis hash with a field and value.

Redis

HSET [1] [2] [3]

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

Amyhash

B"field1"

C"value1"

Dfield1

Attempts:

3 left

💡 Hint

Common Mistakes

Quoting field unnecessarily.

Using unquoted value with spaces causing errors.

HSET command syntax: key, field (string), and value (string). Field and value do not need quotes unless they contain spaces or special characters.