Wilco Source Software Engineer Interview Questions and Answers

There will be 3 coding questions. They are of medium and hard level.

Q1. Sort array consisting 0's 1's and 2's without inbuilt functions
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Q1. Os cn related questions
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Q1. Java questions and general hr questions
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Q1. Introduction and technical questions.
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Q2. What is the use of JAVA API?
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Q3. Questions are picked from Leetcode.
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The duration of the test is one hour and four coding questions are asked.

Aptitude test question logical reasoning and cheking availablity.

It's test last test and skill related to C ,Java, HTML

4 Coding Questions Were Given.
Check Palindrome String
Longest Increasing Subsequence
Group Anagrams
Add Two Numbers(Linked List)

Questions were picked from leetcode but the restriction of not using any inbuild function made them difficult to solve in the given time frame.

Q1. Basic Java Technical Questions
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Q2. Throws Vs Throw
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Q3. Method Overriding Basics and Output-Based Questions
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Q4. Springboot annotations
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Q5. Inheritance and Concept of Abstract Classes and Interfaces
Ans. 
Inheritance allows a class to inherit properties and behaviors from another class. Abstract classes cannot be instantiated and can have abstract methods. Interfaces define a contract for classes to implement.
• Inheritance allows a class to inherit properties and behaviors from another class

• Abstract classes cannot be instantiated and can have abstract methods

• Interfaces define a contract for classes to implement
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Q1. Make a div, so when you hover on it a timer should start.
Ans. 
Create a div that starts a timer when hovered over
• Create a div element in HTML

• Use CSS to style the div

• Add JavaScript event listeners for hover

• Start a timer using JavaScript when hover event is triggered
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Q1. Build an OTP component
Ans. 
Build a secure OTP component for authentication purposes.
• Generate random one-time passwords using a secure algorithm

• Implement time-based expiration for OTPs

• Provide a way for users to input and verify OTPs

• Store OTPs securely to prevent unauthorized access

• Consider using multi-factor authentication for added security
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Q1. Describe your process for writing unit tests.
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Q2. How do you handle tight deadlines while maintaining code quality?
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Q1. Can you walk me through the complex software project you have worked on recently?
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Q2. How do you design systems for scalability and resilience?
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