Delivery agent assignment in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign a delivery agent to an order.

LLD

order.assignAgent([1])

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Aorder

Bagent

Cdelivery

Dassign

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the order object instead of the agent.

Using a method name instead of an object.

The assignAgent method requires the delivery agent object to assign it to the order.

2fill in blank

medium

Complete the code to check if the delivery agent is available before assignment.

LLD

if (agent.[1]()) {
    order.assignAgent(agent);
}

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AisBusy

Bdeliver

Cassign

DisAvailable

Attempts:

3 left

💡 Hint

Common Mistakes

Using isBusy() which returns the opposite.

Calling a method that does not exist.

The isAvailable() method checks if the agent is free to take a new delivery.

3fill in blank

hard

Fix the error in the code to update the agent's status after assignment.

LLD

agent.[1] = false;

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AassignAgent

BisAvailable

Cavailable

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name instead of a property.

Setting the wrong property.

The available property should be set to false to mark the agent as busy.

4fill in blank

hard

Fill both blanks to create a function that assigns the first available agent from a list.

LLD

function assignFirstAvailableAgent(order, agents) {
    for (let [1] of agents) {
        if ([2].isAvailable()) {
            order.assignAgent([2]);
            break;
        }
    }
}

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Aagent

Border

Dagents

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inside the loop.

Using the order or agents list as the loop variable.

The loop variable should be agent to represent each delivery agent in the list. The same variable is used to check availability and assign.

5fill in blank

hard

Fill all three blanks to implement a method that returns a list of available agents.

LLD

function getAvailableAgents([1]) {
    return [2].filter([3] => [3].isAvailable());
}

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Aagents

Cagent

Dorder

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the parameter and the array.

Using a variable name that conflicts with the parameter.

The parameter and the array to filter are both agents. The filter callback uses agent as the variable representing each element.