Search test library by skills or roles
⌘ K

Adaface Sample Redux Questions

Here are some sample Redux questions from our premium questions library (10273 non-googleable questions).

Skills

🧐 Question

Medium

Debugging Redux Actions and Reducers
JavaScript ES6
Reducers
Actions
Solve
A developer is working with a Redux application for managing todo items. After some changes to the code, they started facing a problem: When they try to add a new todo item, it doesn't appear on the list. However, deleting a todo item works as expected.
            
            Here is the error message they see in the console when trying to add a todo: `Cannot read property 'undefined' of undefined.`
            
            And here is the relevant Redux code:
 image
Which of the following changes will resolve the issue?
A: Change payload to todo in addTodo action creator.
            B: Change action.todo to action.payload in todoReducer for ADD_TODO case.
            C: Change action.todo to action.payload in todoReducer for ADD_TODO case and change action.index to action.payload for DELETE_TODO case.
            D: Change payload to todo in addTodo action creator and index to payload in deleteTodo action creator.

Medium

Debugging Redux with Complex State and Action
JavaScript ES6
Reducers
Actions
Immutability
Object manipulation
Solve
A developer is working on a Redux application where each action carries an array of items, and each item is an object with an `id` and `value`. The state is an object where each key is an item's `id` and each value is the item's `value`. However, they notice that the `ADD_ITEMS` action isn't updating the state as expected.
            
            Here is the relevant Redux code:
 image
What change should the developer make to correct the issue?
 image

Medium

Direct State Mutation in Redux
JavaScript ES6
Reducers
Actions
Mutations
Solve
A developer is creating a Redux application to manage a list of blog posts. Each post is represented by an object with id, title, and content properties.
            
            The Redux state should store the post list as an array. The developer observes that the modifications to the posts are not reflecting in the components.
            
            Here is an example of what the state could look like:
 image
Here is the relevant Redux code:
 image
Which of the following changes will resolve the issue?
 image
🧐 Question🔧 Skill

Medium

Debugging Redux Actions and Reducers
JavaScript ES6
Reducers
Actions

2 mins

Redux
Solve

Medium

Debugging Redux with Complex State and Action
JavaScript ES6
Reducers
Actions
Immutability
Object manipulation

2 mins

Redux
Solve

Medium

Direct State Mutation in Redux
JavaScript ES6
Reducers
Actions
Mutations

3 mins

Redux
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Debugging Redux Actions and Reducers
JavaScript ES6
Reducers
Actions
Redux
Medium2 mins
Solve
Debugging Redux with Complex State and Action
JavaScript ES6
Reducers
Actions
Immutability
Object manipulation
Redux
Medium2 mins
Solve
Direct State Mutation in Redux
JavaScript ES6
Reducers
Actions
Mutations
Redux
Medium3 mins
Solve

Trusted by recruitment teams in enterprises globally

Amazon Morgan Stanley Vodafone United Nations HCL PayPal Bosch WeWork Optimum Solutions Deloitte Microsoft NCS Doubtnut Sokrati J&T Express Capegemini

We evaluated several of their competitors and found Adaface to be the most compelling. Great library of questions that are designed to test for fit rather than memorization of algorithms.


Swayam Narain, CTO, Affable

hashtag image heart icon Swayam
customers across world
Join 1200+ companies in 75+ countries.
Try the most candidate friendly skills assessment tool today.
g2 badges
Ready to streamline your recruitment efforts with Adaface?
Ready to streamline your recruitment efforts with Adaface?
logo
40 min tests.
No trick questions.
Accurate shortlisting.
ada
Ada
● Online
Previous
Score: NA
Next
✖️