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Verifone Front end Developer Interview Questions and Answers
Verifone Front end Developer Interview Experiences
1 interview found
The duration of this round was around 20 minutes and there were 40 questions in total. This round consisted of standard mathematical, logical aptitude questions. Aptitude questions based on directions, speed and time, profit loss, etc. were asked. Out of 40 questions, around 15 questions were diagram based questions like finding the odd one, predict the next pattern, etc.
The Second Round is an Online coding test that lasts for around 30 minutes to 1 hour. It was held on the coder byte platform. There were around 5-6 MCQs and 1 Coding Question. MCQ Questions - Predict the output, find errors, Simple language-based questions etc. The Coding Question was from Arrays, Strings, etc. For Example, You are given a string like “ONE PLUS THREE MINUS TWO” and you will have to give output as “TWO”
They will give you a frontend role based on your performance in Interviews Rounds.
(2 Questions)
- Q1. Questions were related to Java Language, DSA and OOPS. Type of questions asked: 1. Simple Coding Problem with the implementation of SETS and HASH MAPS 2. OOPS Pillars 3. Explain each pillar of OOPS wit...
- Q2. You may be asked a few questions related to CSS, Bootstrap (if mentioned in your resume) in Front End Dev Questions: 1. Media Query in CSS 2. Scroll and Height Adjust in CSS 3. Number of Columns in each...
(2 Questions)
- Q1. This was a RESUME BASED Round of around 30 minutes and it started with your introduction. There will be a discussion related to the projects that you made. 1. Why did you make this project? 2. What all f...
- Q2. There could be a few Behavioural and scenario-based questions like: 1. How will you handle conflict within the team? 2. What is more dangerous between shark and elephant? 3. How will you help your team ...
Interview Preparation Tips
Interview questions from similar companies
I applied via Referral and was interviewed in Sep 2024. There was 1 interview round.
(3 Questions)
- Q1. Closures, setTimeout, Eventloop in javascript
- Q2. How to center a div in css3
- Ans.
To center a div in CSS3, use the 'margin: auto;' property along with a set width.
Set the width of the div
Use 'margin: auto;' to center the div horizontally
Make sure the parent container has a defined width
- Q3. Call , bind and apply functions in javascript
- Ans.
call, bind, and apply are methods used to manipulate the context of a function in JavaScript.
call() is used to invoke a function with a specified 'this' value and arguments provided individually.
bind() is used to create a new function with a specified 'this' value and initial arguments.
apply() is used to invoke a function with a specified 'this' value and arguments provided as an array.
Skills evaluated in this interview
I appeared for an interview in Aug 2021.
(1 Question)
Round duration - 90 Minutes
Round difficulty - Easy
1 coding question which was quite easy. Some MCQ that includes basic questions related to html, css, javascript, oops, dbms and output.
- Q1.
LRU Cache Design Question
Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:
1.
get(key)- Return the value of the key if it exists in the cache; otherw... - Ans.
Design a Least Recently Used (LRU) cache data structure that supports get and put operations with a given capacity.
Implement a doubly linked list to keep track of the order of keys based on their recent usage.
Use a hashmap to store key-value pairs for quick access and updates.
When capacity is reached, evict the least recently used item before inserting a new one.
Update the order of keys in the linked list whenever a ke
(2 Questions)
Round duration - 90 Minutes
Round difficulty - Easy
easy round. Had some frontend questions related to html ,css, js , etc Explain Closures in JavaScript. In how many ways can we specify the CSS styles for the HTML element?
- Q1.
String Palindrome Verification
Given a string, your task is to determine if it is a palindrome considering only alphanumeric characters.
Input:
The input is a single string without any leading or trailing... - Ans.
Check if a given string is a palindrome considering only alphanumeric characters.
Remove non-alphanumeric characters from the input string.
Compare the string with its reverse to check for palindrome.
Handle edge cases like empty string or single character input.
Use two pointers approach for efficient comparison.
- Q2. DBMS Questions
normalization, indexing
- Ans.
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity. Indexing is a technique to quickly retrieve data from a database.
Normalization helps in reducing data redundancy by breaking down tables into smaller, related tables.
Indexing is used to quickly retrieve data by creating indexes on columns in a table.
Normalization ensures data integrity by minimizing data dupli...
(3 Questions)
Round duration - 120 Minutes
Round difficulty - Hard
late at 8.00 pm
- Q1.
Priority CPU Scheduling Problem
Given 'N' processes with their “burst times”, where the “arrival time” for all processes is ‘0’, and the ‘priority’ of each process, your task is to compute the “waiting ti...
- Ans.
Implement Priority CPU Scheduling algorithm to compute waiting time and turn-around time for processes.
Implement a function that takes in burst times, priorities, and number of processes as input
Sort the processes based on priority, with lower process ID as tiebreaker
Calculate waiting time and turn-around time for each process based on the scheduling algorithm
- Q2. Can you explain the concept of data spooling in operating systems?
- Ans.
Data spooling is a process where data is temporarily stored in a buffer before being sent to an output device.
Data spooling helps in managing the flow of data between different devices by storing it temporarily.
It allows for efficient processing of data by decoupling the input/output operations.
Examples of data spooling include print spooling, where print jobs are stored in a queue before being sent to the printer.
- Q3. What is the difference between inheritance and generalization in the context of database management systems?
- Ans.
Inheritance is a relationship between a superclass and subclass, while generalization is a relationship between entities with common characteristics.
Inheritance involves a parent-child relationship where the child class inherits attributes and methods from the parent class.
Generalization involves grouping entities with common attributes into a higher-level entity.
Inheritance is a specific form of generalization in obje...
Interview Preparation Tips
Tip 1 : be confident
Tip 2 : make sure to talk less
Tip 3 : give precise answer
Tip 1 : mention only relevant things
Tip 2 : be precise
Skills evaluated in this interview
Mayank Jain
(1 Question)
- Q1. Expected salery
I applied via Campus Placement
There is some aptitude questions along with some subject question(C++,DBMS,OS). And also there is one easy/medium coding question
(1 Question)
- Q1. Interview involves subjects(OS,DBMS,CN,OOPs) , project related questions, and also easy questions from DSA.
(1 Question)
- Q1. It was an easy round HR asked me about intoduction,will you be able to relocate,.... Overall it is an easy round.
Interview Preparation Tips
Mainly focus on subjects for interview.
Software Developer Interview Questions & Answers
i-exceed technology solutions
posted on 28 May 2022
(2 Questions)
- Q1. Basic oops concepts and our projects
- Q2. Basic strucutes of oops concpts and micro services
- Ans.
OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction. Microservices are small, independent services that communicate with each other.
OOPs concepts help in creating modular and reusable code.
Encapsulation ensures that data is hidden and can only be accessed through defined methods.
Inheritance allows a class to inherit properties and methods from a parent class.
Polymorphism allows objects to ta...
Interview Preparation Tips
Skills evaluated in this interview
Software Developer Interview Questions & Answers
i-exceed technology solutions
Anonymous
posted on 17 Apr 2024
Selected
I applied via Campus Placement and was interviewed before Apr 2023. There were 4 interview rounds.
25 question were asked
Java coding and Java oops concepts
(1 Question)
- Q1. Basic Java coding and project explanation
(1 Question)
- Q1. Just general questions
Interview Preparation Tips
- Java
- Javascript
Interview Preparation Tips
Experience: Finally, I got the offer from PayU. I was very Happy. Thanks AmbitionBox for helping me in my preparation
Skills: Algorithm, data structures
College Name: Na
Pranav Bhat Thirthahalli
Interview Questionnaire
14 Questions
- Q1. What is race condition and how can it be eliminated
- Ans.
Race condition is a situation where multiple threads/processes access and manipulate shared data simultaneously.
It can be eliminated by using synchronization techniques like locks, semaphores, and mutexes.
Another way is to use atomic operations that ensure the data is accessed and modified atomically.
Using thread-safe data structures can also prevent race conditions.
Example: Two threads trying to increment a shared var...
- Q2. What is JCube?
- Ans.
JCube is a Java library for creating and manipulating Rubik's Cube puzzles.
JCube provides classes for representing Rubik's Cube puzzles and algorithms for solving them.
It supports various cube sizes and can generate random scrambles.
JCube can be used in Java applications or as a standalone command-line tool.
It is open source and available on GitHub.
- Q3. What is regression testing?
- Ans.
Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works.
It is performed after making changes to the software
It ensures that existing functionality is not affected by the changes
It helps to catch any defects or bugs that may have been introduced
It can be automated using testing tools
Examples include retesting after bug fixes, testing after new
- Q4. Discussion on different sorting techniques
- Q5. Discussion on SQL and SQL optimisaion
- Q6. Software engineering principles
- Ans.
Software engineering principles are the best practices and guidelines for developing high-quality software.
Software should be designed with modularity and scalability in mind.
Code should be well-documented and easy to read.
Testing and debugging should be an integral part of the development process.
Version control should be used to manage code changes.
Security and privacy should be considered throughout the development
- Q7. Java and OOP's question
- Q8. Define Singleton class
- Ans.
A Singleton class is a class that can only have one instance at a time.
It restricts the instantiation of a class to a single object.
It provides a global point of access to that instance.
It is often used in situations where a single object is required to coordinate actions across a system.
Example: Database connection manager, Configuration manager, Logger manager.
- Q9. Explain Testing principles and Design principles
- Ans.
Testing principles ensure software quality, while design principles guide software development.
Testing principles include unit testing, integration testing, and acceptance testing.
Design principles include SOLID, DRY, and KISS.
Testing principles ensure that software meets requirements and is free of defects.
Design principles guide software development to be modular, maintainable, and scalable.
- Q10. Types of machine learning and methods and examples, they may give you a situation and ask you which technique is good and why
- Q11. Why choose you for VISA?
- Ans.
I have the necessary skills, experience, and passion to contribute to VISA's success.
I have a strong background in software development and have worked on projects similar to those at VISA.
I am a quick learner and can adapt to new technologies and programming languages easily.
I am passionate about creating high-quality software that meets the needs of users and exceeds their expectations.
I am a team player and can work...
- Q12. Which profile is good for you?
- Ans.
A profile that challenges me to learn and grow while allowing me to contribute to a team.
A position that encourages continuous learning and development
A role that allows me to collaborate with a team and contribute to projects
A company culture that aligns with my values and work ethic
- Q13. About the work culture at VISA Inc
- Q14. If u already have a placement, why this company
- Ans.
I am interested in exploring new opportunities and challenges that this company can offer.
I am impressed with the company's reputation and growth potential.
I am excited about the projects and technologies this company is working on.
I believe this company can provide me with a better work-life balance and career growth opportunities.
I am looking for a company culture that aligns with my values and goals.
I am open to exp...
Interview Preparation Tips
Experience: Online Test on mettl.com
- 2 coding questions ( 15*2 = 30 marks ) - Moderate level
- 10 MCQs on Programming and Java ( 1*10 = 10)
- 6 MCQs on Machine Learning and Hadoop ( 1*6 = 6 )
- 6 MCQs on Computer Networks ( 1*6 = 6 )
- 6 MCQs on Computer Infrastructure and Architecture ( 1*6 = 6)
- 6 MCQs on Application security and Cryptography ( 1*6 = 6)
15 shortlisted from here including 8 B.Techs and 7 M.Techs for F2F interviews, which were taken by VISA employees from their US and Singapore offices( since they don't have any office at India ).
Round: Technical Interview
Experience: They may give you a situation and ask you to explain which Software engineering principles will you use. They ask you how will you explain the concept of stacks and queues to a 7 year old, or to a granny, so as to encourage programming(like seriously ? )
General Tips: Nothing as such, since this was my second on-campus placement, I had good experience of interviews.
Keep your fundamentals in all computer science subjects open. Unlike other companies they don't focus much on coding alone. The only other company which also looks at perfection in all computer science aspects is Xerox Research Center India.
Challenging and Equally rewarding, but seriously a unique experience with no much tension
Skills:
College Name: NIT Surathkal
Skills evaluated in this interview
Interview Questionnaire
1 Question
- Q1. Tell me about your project ( written in language)?
- Ans.
Developed a web application using Python and Django framework for managing inventory and sales.
Used Python programming language for backend development
Implemented Django framework for building web application
Designed database schema for inventory and sales data
Integrated frontend using HTML, CSS, and JavaScript
Implemented user authentication and authorization features
Interview Preparation Tips
Experience: They asked 3 question on data structures .
1.Merging linekd list
2 and 3 BST related
Duration: 1 hour
Total Questions: 3
Round: Technical Interview
Experience: Interviewer asked me to explain projects which I had mentioned in Resume. Then He asked me to implement a problem on basis of my project.
It was telephonic round.
CGPA and my project mattered.
College Name: IIT Roorkee
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