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Zscaler Softech Senior Software Engineer Interview Questions, Process, and Tips

Updated 23 Oct 2024

Top Zscaler Softech Senior Software Engineer Interview Questions and Answers

  • Q1. How to create singleton ensuring reflection does not mess up the implementation
  • Q2. Swap character from uppercase to lowercase and lowercase to uppercase Zscalar ->zSCALAR without using 1.util function 2.arithimatic operator 3.map 4.array function
  • Q3. How to handle millions of request from clients?
View all 9 questions

Zscaler Softech Senior Software Engineer Interview Experiences

4 interviews found

Senior Software Engineer Interview Questions & Answers

user image Mayank Upadhyaya

posted on 19 Dec 2023

Interview experience
3
Average
Difficulty level
Hard
Process Duration
-
Result
No response
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - One-on-one 

(5 Questions)

  • Q1. Difference. Between concurrent hash map and synchronised hashmap
  • Ans. 

    ConcurrentHashMap allows multiple threads to access and modify the map concurrently, while SynchronizedHashMap ensures thread-safety by allowing only one thread to access the map at a time.

    • ConcurrentHashMap is more efficient in scenarios with high concurrency as it allows concurrent read and write operations.

    • SynchronizedHashMap is simpler to use and provides thread-safety, but can lead to performance degradation in hig...

  • Answered by AI
  • Q2. Semaphores in java how to implement
  • Ans. 

    Semaphores in Java are used for controlling access to a shared resource. They can be implemented using the java.util.concurrent package.

    • Use the Semaphore class from the java.util.concurrent package

    • Create a Semaphore object with an initial number of permits

    • Use the acquire() method to acquire a permit before accessing the shared resource

    • Use the release() method to release a permit after accessing the shared resource

  • Answered by AI
  • Q3. Bitmask in Postgresql how to use
  • Ans. 

    Bitmask in Postgresql is used to store and manipulate multiple boolean values within a single integer column.

    • Bitmask is a technique to represent a set of boolean flags using binary digits.

    • In Postgresql, the bitwise operators (&, |, ^, ~) can be used to perform operations on bitmasks.

    • To set a specific flag in a bitmask, use the bitwise OR operator (|).

    • To check if a flag is set in a bitmask, use the bitwise AND operator ...

  • Answered by AI
  • Q4. Swap character from uppercase to lowercase and lowercase to uppercase Zscalar ->zSCALAR without using 1.util function 2.arithimatic operator 3.map 4.array function
  • Ans. 

    Swap characters from uppercase to lowercase and lowercase to uppercase in a given string.

    • Iterate through each character in the string

    • Check if the character is uppercase or lowercase

    • Swap the case of the character using bitwise XOR operation

    • Build the resulting string with the swapped characters

  • Answered by AI
  • Q5. How to create singleton ensuring reflection does not mess up the implementation
  • Ans. 

    To create a singleton ensuring reflection does not mess up the implementation, use an enum or a private constructor with a static field.

    • Use an enum to create a singleton as enums are inherently singletons and cannot be instantiated multiple times.

    • Alternatively, use a private constructor with a static field to create a singleton.

    • To prevent reflection from creating multiple instances, throw an exception in the constructo

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare bit operations and java.util.concurrent package

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Implement a circular list.
  • Ans. 

    Implement a circular list

    • Use a linked list where the last node points back to the first node

    • Keep track of the current node for easy traversal

    • Ensure proper handling of edge cases like empty list or single node

  • Answered by AI
  • Q2. How to handle millions of request from clients?
  • Ans. 

    Use load balancing, caching, and scaling techniques to handle millions of requests from clients.

    • Implement load balancing to distribute requests evenly across servers.

    • Utilize caching mechanisms to store frequently accessed data and reduce load on servers.

    • Scale horizontally by adding more servers to handle increased traffic.

    • Optimize code and database queries to improve performance and reduce response times.

  • Answered by AI

Skills evaluated in this interview

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Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Best time to buy and sell stock
  • Ans. 

    The best time to buy and sell stock is when the price is low to buy and high to sell, maximizing profit.

    • Buy when the stock price is low and sell when it is high

    • Consider market trends and analysis to predict the best time to buy and sell

    • Avoid emotional decision-making and stick to a well-thought-out strategy

  • Answered by AI
  • Q2. Create a bar graph
  • Ans. 

    Creating a bar graph using array of strings

    • Create an array of strings representing the data points for the bar graph

    • Each string should indicate the value of the bar and its corresponding label

    • Use a visualization tool or library to plot the bar graph based on the array of strings

  • Answered by AI

Skills evaluated in this interview

I applied via Approached by Company and was interviewed in Nov 2022. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Leetcode questions on strings, arrays and hashmap
Round 3 - One-on-one 

(1 Question)

  • Q1. Resume based questions + domain knowledge
Round 4 - One-on-one 

(1 Question)

  • Q1. System design interview + resume based questions

Interview Preparation Tips

Interview preparation tips for other job seekers - This has to be one of the worst job interview process I have ever gone through. The recruiter contacted me over phone for Software engineer position and scheduled an interview in a week's time. While the interviews (5 in total) were of easy/moderate difficulty the whole process took 2.5 long months. I cleared them all and discussed salary figures, with the HR constantly in touch to persuade me to join, and then out of the blue one day he calls and says your application hasn't been approved by the higher ups so we can't proceed further. Didn't have the decency to give any explanation as to why this happened. Complete waste of everyone's time and unapologetically unprofessional behavior. Would recommend treading carefully with these folks.

Zscaler Softech interview questions for designations

 Senior Software QA Engineer

 (1)

 Software Engineer

 (2)

 Software Engineer Intern

 (1)

 Associate Software Engineer

 (1)

 Senior Devops Engineer

 (1)

 Software Developer

 (5)

 Software Tester

 (3)

 Software Engineer2

 (1)

Senior Software Engineer Jobs at Zscaler Softech

View all

Interview questions from similar companies

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
-
Result
Selected Selected
Round 1 - Technical 

(1 Question)

  • Q1. JavaScript , coding questions
Round 2 - Technical 

(1 Question)

  • Q1. Coding problem, JavaScript and nodejs question
Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
-
Result
No response

I applied via Walk-in and was interviewed in Nov 2024. There were 5 interview rounds.

Round 1 - Coding Test 

Normal online code / frontend test

Round 2 - Technical 

(1 Question)

  • Q1. How would you build book my show
  • Ans. 

    Designing and building a platform similar to BookMyShow involves creating a user-friendly interface for booking tickets for various events.

    • Develop a user-friendly website and mobile app for users to browse and book tickets for movies, concerts, plays, etc.

    • Implement a secure payment gateway for users to make online transactions.

    • Integrate a database to store information about events, venues, tickets, and user bookings.

    • In...

  • Answered by AI
Round 3 - Technical 

(1 Question)

  • Q1. Solid principals, awareness of patterns
Round 4 - Technical 

(1 Question)

  • Q1. How would you build tinyurl like service, systems designs
  • Ans. 

    To build a tinyurl-like service, design a system with a URL shortening algorithm, a database to store mappings, and a redirect service.

    • Use a hashing algorithm to generate short URLs from long URLs (e.g. MD5, SHA-256).

    • Store the mappings of short URLs to long URLs in a database (e.g. MySQL, Redis).

    • Implement a redirect service that takes a short URL, looks up the corresponding long URL in the database, and redirects the u...

  • Answered by AI
Round 5 - One-on-one 

(1 Question)

  • Q1. Non-technical questions

Interview Preparation Tips

Interview preparation tips for other job seekers - no reply after giving so many rounds.
Interview experience
1
Bad
Difficulty level
Easy
Process Duration
-
Result
Selected Selected

I was interviewed in Dec 2024.

Round 1 - Coding Test 

Mainly 4 Questions
1-2 MCQ
3: Create a class deriving from IReptile and return an object of HatchEgg which has Hatch Method. Hatch Method should return same IReptile object.
4) Sorting IDs in dictionary

Round 2 - Technical 

(2 Questions)

  • Q1. The Interviewer was Very Rude and he doesn't care about the Requirements of Hiring a candidate. he was constantly asking about Other Companies Architectures and The things you did in them. instead of havin...
  • Q2. SOLID, Interfaces , Boxing/Unboxing

Interview Preparation Tips

Interview preparation tips for other job seekers - Stay away from this company. very toxic
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
-

I applied via Referral and was interviewed in Sep 2024. There were 2 interview rounds.

Round 1 - Technical 

(4 Questions)

  • Q1. Find longest palindromic substring in a given string.
  • Ans. 

    Use dynamic programming to find the longest palindromic substring in a given string.

    • Iterate through the string and expand around each character to find palindromes.

    • Store the length of the longest palindrome found so far.

    • Return the substring based on the start and end indices of the longest palindrome.

  • Answered by AI
  • Q2. How to serialize and deserialise a tree
  • Ans. 

    To serialize and deserialize a tree, use a recursive approach to traverse the tree and store the data in a suitable format.

    • Use pre-order traversal to serialize the tree by storing the node values in a list or string.

    • For deserialization, reconstruct the tree by recursively building nodes from the serialized data.

    • Consider using JSON or XML format for serialization to easily store and retrieve tree structure.

  • Answered by AI
  • Q3. Find if a given regex (containing ., * and lower case english chars) matches a given string.
  • Ans. 

    Use regex library to match given regex with string.

    • Use a regex library like re in Python to match the given regex with the string.

    • Check if the regex matches the string using the library functions.

    • Handle cases where the regex contains special characters like . and * appropriately.

  • Answered by AI
  • Q4. Explain about throttling and implement throttle function.
  • Ans. 

    Throttling is a technique used to control the rate of requests sent to a server.

    • Throttling helps prevent server overload by limiting the number of requests processed at a time.

    • Implementing a throttle function involves setting a maximum request rate and delaying excess requests.

    • Example: Implementing a throttle function in a web application to limit the number of API calls made to a third-party service.

    • Example: Throttlin...

  • Answered by AI
Round 2 - Technical 

(4 Questions)

  • Q1. Find squares of elements in a sorted array and return the sorted response.
  • Ans. 

    Sort the squares of elements in a sorted array and return the sorted response.

    • Iterate through the array and square each element.

    • Store the squared values in a new array.

    • Sort the new array and return it.

  • Answered by AI
  • Q2. Write a short promise example and implement your own promise
  • Ans. 

    A promise is a commitment to do something in the future, typically used for asynchronous operations in JavaScript.

    • Promises are used to handle asynchronous operations in JavaScript.

    • They represent a value that may be available now, in the future, or never.

    • Promises have three states: pending, fulfilled, or rejected.

    • Example: new Promise((resolve, reject) => { setTimeout(() => resolve('Done!'), 1000); });

  • Answered by AI
  • Q3. Explain event loop, what are different types of queues in event loop
  • Ans. 

    Event loop is a mechanism that allows for asynchronous execution of code by managing the order of events in a single thread.

    • Event loop continuously checks the call stack for any functions that need to be executed, and processes them in a non-blocking manner.

    • Different types of queues in event loop include microtask queue (Promise callbacks), macrotask queue (setTimeout, setInterval callbacks), and animation frame queue

  • Answered by AI
  • Q4. What is virtual DOM and why its faster
  • Ans. 

    Virtual DOM is a lightweight copy of the actual DOM, used to improve performance by minimizing direct manipulation of the real DOM.

    • Virtual DOM is a concept used in frameworks like React to optimize rendering performance.

    • Changes are first made to the virtual DOM, which is then compared to the real DOM to identify the minimal updates needed.

    • This approach reduces the number of actual DOM manipulations, resulting in faster...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for ServiceNow Senior Software Engineer interview:
  • React.Js
  • Javascript
  • DSA

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
Selected Selected
Round 1 - Technical 

(1 Question)

  • Q1. Reverse the linked list.
Round 2 - Technical 

(1 Question)

  • Q1. Internel working of Hashmap
Round 3 - HR 

(1 Question)

  • Q1. Salary Discussion
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Not Selected
Round 1 - Coding Test 

DSA round leetcode style question

Round 2 - Technical 

(1 Question)

  • Q1. Design + Coding round for rate limiter

Interview Preparation Tips

Interview preparation tips for other job seekers - Final round - System Design

Zscaler Softech Interview FAQs

How many rounds are there in Zscaler Softech Senior Software Engineer interview?
Zscaler Softech interview process usually has 2 rounds. The most common rounds in the Zscaler Softech interview process are Technical, One-on-one Round and Resume Shortlist.
How to prepare for Zscaler Softech Senior Software Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Zscaler Softech. The most common topics and skills that interviewers at Zscaler Softech expect are Python, Linux, Debugging, Unix and Networking.
What are the top questions asked in Zscaler Softech Senior Software Engineer interview?

Some of the top questions asked at the Zscaler Softech Senior Software Engineer interview -

  1. How to create singleton ensuring reflection does not mess up the implementat...read more
  2. Swap character from uppercase to lowercase and lowercase to uppercase Zscalar...read more
  3. How to handle millions of request from clien...read more

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Zscaler Softech Senior Software Engineer Interview Process

based on 3 interviews

Interview experience

3.7
  
Good
View more
Zscaler Softech Senior Software Engineer Salary
based on 86 salaries
₹12 L/yr - ₹42.5 L/yr
67% more than the average Senior Software Engineer Salary in India
View more details

Zscaler Softech Senior Software Engineer Reviews and Ratings

based on 12 reviews

3.6/5

Rating in categories

3.5

Skill development

3.5

Work-life balance

3.8

Salary

3.5

Job security

3.2

Company culture

3.5

Promotions

3.2

Work satisfaction

Explore 12 Reviews and Ratings
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Hyderabad / Secunderabad

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