XADD for adding entries in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add an entry to a Redis stream with the ID generated automatically.

Redis

XADD mystream [1] name Alice age 30

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

A0

B+

C$

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or $ instead of * causes errors or unexpected behavior.

Forgetting to specify the ID placeholder.

Using * tells Redis to generate an automatic ID for the new stream entry.

2fill in blank

medium

Complete the code to add an entry with a specific ID '1609459200000-0' to the stream.

Redis

XADD mystream [1] name Bob score 85

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

A*

B1609459200000-0

C$

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using * when a specific ID is required.

Using $ which refers to the last ID in the stream.

Specifying the ID explicitly allows you to control the entry's timestamp and sequence number.

3fill in blank

hard

Fix the error in the code to add an entry with fields 'temperature' and 'humidity'.

Redis

XADD weather_stream [1] temperature 22 humidity 60

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

Alast

Blatest

C*

Dnow

Attempts:

3 left

💡 Hint

Common Mistakes

Using words like 'latest' or 'now' instead of *.

Omitting the ID placeholder.

The ID must be * for automatic generation; 'latest', 'now', or 'last' are invalid.

4fill in blank

hard

Fill both blanks to add an entry with ID '1609459200000-0' and fields 'event' and 'status'.

Redis

XADD events_stream [1] event login status [2]

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

A1609459200000-0

B*

Cstatus

Dsuccess

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping field names and values.

Using * instead of the explicit ID.

The first blank is the explicit ID, the second blank is the value for the 'status' field.

5fill in blank

hard

Fill all three blanks to add an entry with automatic ID and fields 'user', 'action', and 'time'.

Redis

XADD user_actions [1] user Alice action [2] [3] 10:00

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

A*

Baction

Ctime

Dlogin

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up field names and values.

Using explicit ID instead of *.

The first blank is the automatic ID symbol *, the second blank is the value 'login', and the third blank is the field name 'time'.