When interviewing developers who have substantial working experience, our interviewers tend to focus on previously completed projects and the candidate’s contributions to the success of those projects, rather than formal education and courses. If a candidate has little experience in commercial development, JS interview questions may focus on projects performed during studies, pet projects, and similar indicators of interest and ability.
Here are a few pro tips for a successful background check:
- Recall significant moments from previous work experience. Frequently, interviewers ask about the most challenging tasks or complex decisions that a developer had to address on a previous project. Prepare for this in advance so you can showcase your expertise and stay confident during your interview.
You could be asked general JS questions about the:
- Difference between an event loop, a microtask, and a macrotask;
- Promise and peculiarities of working with JS;
- Prototypes and prototype inheritance; and
- Different approaches to state management and the advantages and drawbacks;
- Virtual DOM and what it's used for; and
- What JSX is, and some advantages and drawbacks of the technology.
Usually, interviewers ask 3-4 theoretical questions and this session lasts for 10-15 minutes.
Practical JS interview tasks
JS tasks for interview: final thoughts