ClearTax Senior Software Engineer Interview Questions and Answers

Q1. Join, groupby questions in pyspark
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Round duration - 90 Minutes
Round difficulty - Medium

This round happened on the same day as JAM in the afternoon time. A slot of 20 minutes with respective timing was already sent to the selected students. Interview can’t be generalize as anything can happen over there and hence this was exclusively my experience. 
To have a quick judgement about the person, I believe nothing is better than throwing before him/her some puzzles (mathematical/ analytical/ programming problems) and see the approach. I received back-to-back 4 problems after a quick and brief introduction. The coding problems I got were way too easy (just basics: searching & mathematical). The harder part of this round was the puzzles (tricky, mathematical, related to probability). At last, I was asked a question on DBMS and the interviewer asked if I know JAVA.

Q1. 
Search an Element in a Sorted Array
Given a sorted array 'A' of 'N' integers, determine whether a number 'X' exists within this array for a series of queries. For each query, print 1 if 'X' exists in the ...read more
Ans. 
Search for a number in a sorted array and determine its existence for multiple queries.
• Use binary search algorithm to efficiently search for each query integer in the sorted array.

• For each query integer 'X', check if it exists in the array 'A' and output 1 if found, 0 otherwise.

• Ensure the array 'A' is sorted in non-decreasing order to apply binary search effectively.
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Binary search tree and linked list

Q1. About react. Js
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Q2. About my resume
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I cleared the aptitude and coding tests, followed by the communication assessment. After successfully passing both rounds, I was shortlisted for the interviews.

Q1. Tell me about yourself
Ans. 
I am a passionate software developer with experience in building web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and project management tools like Jira
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Q2. Projects and what kind of person I am. Background check.
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Q1. Projects, resume
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Q2. Cloud computing and cyber security questions.
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Q1. Managerial round both technical and HR type questions where asked.
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Q2. Scenario based questions
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Simple coding test with easy to medium level questions

Q1. What motivated you to get into this field ?
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Q2. What are your long term goals
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Python coding test

Q1. What is mvc lify cyle with example?
Ans. 
MVC lifecycle is the sequence of events that occur during the execution of a Model-View-Controller application.
• 1. User interacts with the View triggering a request

• 2. Controller receives the request and processes it

• 3. Controller updates the Model with new data

• 4. Model notifies the View about the changes

• 5. View retrieves the updated data from the Model

• 6. View renders the updated data for the user
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Q2. What is interface,abstraction,polymorphism?
Ans. 
Interface, abstraction, and polymorphism are key concepts in object-oriented programming.
• Interface: A contract that defines a set of methods that a class must implement.

• Abstraction: The process of hiding the implementation details and exposing only the essential features of an object.

• Polymorphism: The ability of an object to take on many forms, allowing objects of different classes to be treated as objects of a common
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Q3. What is const and readonly ?
Ans. 
const and readonly are keywords used in programming to define variables that cannot be modified.
• const is used to declare a constant variable that cannot be changed after initialization

• readonly is used to declare a variable that can only be assigned a value at the time of declaration or in the constructor

• const variables are implicitly static and must be initialized with a constant value

• readonly variables can have differ
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Q4. What is virtual and override keyword?
Ans. 
The virtual keyword is used to allow a method to be overridden in a derived class. The override keyword is used to indicate that a method is intended to override a base class method.
• The virtual keyword is used in the base class to define a method that can be overridden in a derived class.

• The override keyword is used in the derived class to indicate that a method is intended to override a base class method.

• The virtual k...read more
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