If you go online, you will find jobs, courses, and training programs that can move your career forward. But, in what direction? When it comes to choosing the next step in your AI career, there are two things that will help you strategize. First, you have to learn about yourself. Then, you need to explore opportunities that fit for your present skills and will help you build new skills.

By taking the Workera test, you will:

This guide is intended to help you understand what the test evaluates and prepare for it.

I   What the test evaluates

The test evaluates your ability to carry out tasks involved in AI projects including data engineering, modeling, deployment, business analysis, and AI infrastructure. The skills required to achieve those tasks are clustered and evaluated in six distinct test sections described in the table below. Each section is comprised of multiple choice questions selected from a large database, so that different test takers get different questions.

Section Description Average duration
Machine learning This section evaluates your mastery of ML models (e.g., PCA, K-means, K-NNs, SVM, Logistic Regression, Linear Regression and Decision Trees), methods to train ML models (e.g., initialization, optimization, regularization, and model selection), and decision making in ML projects (e.g., error analysis, collecting and labeling data, splitting and augmenting data, and choosing an evaluation metric). 17 min
Deep learning This section evaluates your understanding of deep learning fouundations (e.g., neurons, fully-connected layers, deep neural networks, forward propagation, backpropagation, and activation functions), techniques to improve neural networks (e.g., initialization, optimization, regularization, and selection of deep learning models), convolutional neural networks (e.g., convolutional and maxpool layers, classic CNNs, and techniques such as skip connections), and sequence models (e.g., recurrent neural networks, LSTM and GRU cells, and methods such as embeddings used in natural language processing, speech recognition or time series analysis). 15 min
Data science This section evaluates your ability to use probabilities (e.g., probability distributions, operations on probabilities, and properties of random variables), use statistics (e.g., statistical theorems like the Central Limit Theorem, statistical parameters, and hypothesis testing), and analyze data (e.g., data preprocessing, data visualization and the use of common metrics). 15 min
Mathematics This section evaluates your ability to work with mathematical objects and operations used in AI. This includes matrix/vector operations and properties (e.g., dot product, outer product, summation, multiplication, transposition, inverse, determinant, etc.), mathematical functions and their properties (e.g. Euclidian norm, L1 norm, sigmoid, ReLU, tanh, softmax, cosine, sine, min, max, argmin, argmax, convexity, concavity, etc.), and understanding calculus (e.g., differentiating and integrating common functions). 14 min
Algorithmic coding This section evaluates your ability to solve algorithmic problems (e.g., sorting, search on trees and graphs, matching, permutation, counting, tree traversal, etc.), use data structures and types (e.g., lists/arrays, sets, maps/dictionaries, trees, graphs, linked lists, tuples, queues, stacks, heaps, strings, integers, floats, etc.), and apply coding methods (e.g., recursion, backtracking, divide and conquer, etc.). 16 min
Software engineering This section evaluates your understanding of software development management methodologies (e.g., version control, management frameworks like Scrum and Agile, and processes to review and test code), design patterns and architectures (e.g., object-oriented design, domain-driven design, monolithic architecture and microservices), computer networking (e.g., TCP-IP, basic encryption, HTTP, Domain Name Server, Cookies, IPv4, IPv8, etc.), databases (e.g., relational database management systems and SQL), and computing (e.g., cloud and distributed computing, performance measures like latency and throughput, concurrency, parallelism, and race conditions). 15 min

II   How the test was built

Our computerized tests are created by a team of experts in AI and assessment led by Dr. Andrew Ng and Kian Katanforoosh from and Stanford University. Our massive question library covers more than 500 AI and software topics.

Assessing the right skills

We interviewed more than 100 machine learning and data science leaders to understand what tasks are necessary to develop AI projects. With that information, we derived a list of AI skills required to carry out the identified tasks. Then, a team of experts wrote and continue to write questions to evaluate the relevant skills.

Providing actionable feedback

Questions were grouped in six ubiquitous subjects so that people can identify their strength and weaknesses at the skill and subject levels.

Assuring test quality

The test is monitored both qualitatively and quantitatively:

III   Preparing for the test

Practice makes perfect, so we recommend that you check the following resources to practice for each section of the test. Remember that you have 3 attempts so don’t overstress: use your first attempt to practice.

IV   Tips for taking the test

Here are some tips to ensure a good testing experience:


  1. Workera - Research & Development


  1. The layout for this article was originally designed and implemented by Jingru Guo, Daniel Kunin, and Kian Katanforoosh for the AI Notes, and inspired by Distill.
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