Full Stack Engineer Interview Questions

A full-stack engineer is a technical expert in web and software development. They can handle almost every aspect of development, from servers to systems engineering and databases. During an interview, you can expect both technical questions and questions to determine your interpersonal and communication skills.

11,550 Full Stack Engineer interview questions shared by candidates

Top Full Stack Engineer Interview Questions & How to Answer

Here are three top full stack engineer interview questions and how to answer them:

Question #1: Are you working on anything right now?

How to answer: Since more coders are always working on something, the interviewer wants to get an idea of how involved you are in coding. Talk about any projects you are currently working on, whether it's for work or something you are doing on your own time.

Question #2: How did you select the tools and technologies for your last project?

How to answer: The interviewer wants to get an idea of your experience and how you go about working through a project. Explain the details about the process you followed, talk about why you selected the language you used, and mention what tools and technologies you selected. You can also talk about any problems you faced throughout the development and how you overcame them.

Question #3: What are the latest trends in full-stack web development?

How to answer: Make sure you are up to date on the latest trends in all kinds of web and software development before your interview. Mention a few of the latest developments you are familiar with and how they might apply to the job. You can also talk about how you learned about the new technology.

Top Interview Questions

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Senior Full Stack Developer was asked...August 4, 2014

How would you build a BART train system.

2 Answers

Various infrastructure, logic, and fail safe issues. Caching, redundancy, customer experience handling in case of failures. Less

I would identify and address all of the various infrastructure, logic, and fail safe issues as well as design systems to handle caching, redundancy, and customer experience handling in case of failures. Less

Greenhouse Software

Design the DB and server system where multiple users can enter calendar events, including alerts for those events.

1 Answers

I designed the tables and columns I would need in a SQL database, and I wrote some pseudocode that would run in a cron job to send out alerts. I also wrote the SQL query to get all alerts that are pending. Once prompted, I added indexes and optimized the query. Less


Given a formula (string) and a dict, replace each key that appears in the formula with its value. "CONCATENATE("#first_name#", " - ", 30)" { 'first_name': "Moshe", 'age': 20, 'status': "Done"} Result: "CONCATENATE("Moshe", " - ", 30)"

9 Answers

column_id_to_value = {'first_name': "Moshe", 'age': 20, 'status': "Done"} formula = 'CONCATENATE("#first_name#", " - ", #age#)' dotIt(formula, column_id_to_value) def dotIt(formula, dictionary): answer = [] formula_list = formula.split("#") for form in formula_list: if form in dictionary: answer.append(str(dictionary[form])) else: answer.append(form) print(''.join(answer)) Less

let formula = "CONCATENATE('#first_name#', ' - ', '#age#')"; let user = { first_name: "Moshe", age: 20, status: "Done"}; let keys = Object.keys(user); function getKeys() { const keys = Object.keys(user); keys.forEach( key => formula = formula.replace(new RegExp('#'+key+'#'), user[key])); console.log(formula); } getKeys(); Less

def calculate_for_row(formula, column_id_to_value): result = [] replaced_last_part = False new_formula_parts = formula.split('#') for index, part in enumerate(new_formula_parts): if part in column_id_to_value: result.append(str(column_id_to_value[part])) replaced_last_part = True else: if index > 0 and not replaced_last_part: result.append('#') result.append(part) replaced_last_part = False parse(''.join(result)) def parse(formula): print(formula) column_id_to_value = {'first_name': "Moshe", 'age': 20, 'status': "Done"} formula = 'CONCATENATE("#first_name#", " - ", #age#)' calculate_for_row(formula, column_id_to_value) Less

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list and array related questions Basic sql question

7 Answers

did my level best in 2nd round but not selected.

Can you share 2nd round question

Hi, can you please share the coding questions asked in round 2?

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MountBlue Technologies

Print patterns like Swastic sign, 2-D Array manipulations(Bit Difficult) and String manipulations.

6 Answers

They will mail the exact date. The joining date is between 6-16 aug. The difficulty of 2nd round was medium. One question was a bit difficult and the rest were medium.If you are good at coding and regularly doing it then you can easily crack it. Less

Be sure you are good at coding.

when is your joining??what is the difficulty of 2nd round?

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return true if array of size n contains a permutation of [1,n]

5 Answers

for(var i=0; i

public static bool isPermutation(int[] arr) { int num = 0; for (int i = 0; i arr.Length) return false;//number out of range int tmp = 1 << (arr[i]-1); if ((num & tmp) == tmp) return false;// number was found before - duplicate num |= tmp; } return true; } Less

// Java Program to decide if an // array represents a permutation or not import java.util.*; class GFG{ // Function to check if an // array represents a permutation or not static boolean permutation(int []arr, int n) { // Set to check the count // of non-repeating elements Set hash = new HashSet(); int maxEle = 0; for (int i = 0; i < n; i++) { // Insert all elements in the set hash.add(arr[i]); // Calculating the max element maxEle = Math.max(maxEle, arr[i]); } if (maxEle != n) return false; // Check if set size is equal to n if (hash.size() == n) return true; return false; } // Driver code public static void main(String args[]) { int arr[] = { 1, 2, 5, 3, 2 }; int n = arr.length; if (permutation(arr, n)) System.out.println("Yes"); else System.out.println("No"); } } Less

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JATO Dynamics

Why did i choose to apply for JATO?

5 Answers

I answered with I am looking for a challenge and to join a company that has a long term vision and goal and they needs people like me to join the journey and support them through the company transformation. Less

Read my "Database Production Assistant" and you will realise how slippery, contorted, unreliable and mendacious they are, worthy of avoiding for aye. Less

Thank you for your review. JATO appreciate the comments and feedback provided and are happy to hear you were happy with the outcome of the interview, even though the technical questions were a little difficult. Less

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What are the design patterns? What is a promise? Asked about my projects Program about linked list

5 Answers

Builder pattern A linked list is a linear data with structure in which elements , design a data structure that supports for following operations Less

Oct 2nd

Yes we have to conduct the interview

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difference between null and void

5 Answers

Could you please tell us what can be the expected salary for 4-5 years of experience candidate. Less

Do you know what is the salary band for PM?

How much salary did they offer you?

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solve a problem without for loops

5 Answers


How went the second challenge?

How was the second challenge?

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