Zendesk Senior Software Engineer Interview Questions and Answers

Data Structure related questions

Q1. Java related interview questions
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Q1. Advantage and disadvantage of framework.
Ans. 
Frameworks provide structure and pre-built components for software development, but can also limit flexibility and require learning curve.
• Advantage: Provides structure and pre-built components for faster development

• Advantage: Can improve code quality and maintainability

• Disadvantage: Can limit flexibility and customization

• Disadvantage: Requires learning curve and potential dependency issues

• Example: ReactJS provides a fr...read more
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Q1. What is Oops? Advantage and disadvantage
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Oops stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent real-world entities.
• Advantages: code reusability, modularity, encapsulation, inheritance, polymorphism

• Disadvantages: complexity, steep learning curve, performance overhead

• Example: creating a class 'Car' with properties like 'make', 'model', and 'year', and methods like 'start_engine' and 'stop_engine'
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Q1. 1 Coding ques, Java, Spring Boot
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Q1. System Design, LLD
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Q1. Simple C++ questions
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Q2. Simple C++ Answers
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Q1. Simple C++ questions were asked
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Q2. Simple Questions
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Q3. Simple Question
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Coding test with 2 questions

Q1. System Design with LLD implementation
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System design involves creating a high-level design of a software system, followed by implementing the detailed low-level design.
• Start by understanding the requirements and constraints of the system

• Create a high-level design that outlines the components and interactions of the system

• Implement the detailed low-level design, considering factors like scalability, performance, and maintainability

• Use tools like UML diagrams...read more
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Q1. System Design with HLD
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System Design with HLD involves designing the high-level architecture of a software system.
• Understand the requirements and constraints of the system

• Identify the components and their interactions

• Consider scalability, reliability, and performance

• Use design patterns and best practices

• Create diagrams like UML or flowcharts to visualize the design
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Q1. What you do when your wifi is not connected with other device and you didn't get password
Ans. 
Try to troubleshoot the wifi connection issue by checking settings, restarting devices, and seeking help from IT support.
• Check if the wifi is turned on and the correct network is selected

• Restart the wifi router and the device

• Contact IT support for assistance in retrieving the password
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Q2. Find maximum value given an array with numbers and you can jump to any number and the value is jump length multiplied by value of location
Ans. 
Iterate through array, calculate value at each index, keep track of maximum value
• Iterate through the array and calculate the value at each index by multiplying jump length with value of location

• Keep track of the maximum value encountered during the iteration

• Return the maximum value found
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Write a program to solve a challenging programming and algorithm problem.

Q1. Write a program to solve a challenging programming and algorithm problem.
Ans. 
Program to find the maximum subarray sum using Kadane's algorithm
• Initialize max_so_far and max_ending_here to 0

• Iterate through the array and update max_ending_here with the maximum of current element or current element + max_ending_here

• Update max_so_far with the maximum of max_so_far and max_ending_here
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Q2. Write a program to solve a second challenging programming and algorithm problem.
Ans. 
Implement a program to find the longest common subsequence of two strings.
• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the lengths of longest common subsequences of substrings.

• Trace back the array to reconstruct the longest common subsequence.
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