Wissen Technology Interview Questions, Process, and Tips

Q1. Design classes, and interfaces for Card(taash ke patte) games. Numbers from A, 2, 3, ..., symbol of 10,11... was given.
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Q2. Streams - flat map
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Coding test was easy. They asked LC easy anyone with fair understanding of programming can easily solve it.

Q1. Asked a question from Blind 75 that i dont remember as of now. I kind of stumbled here yet gave a code for original question
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Q2. Asked LC hard question. Interviewer was very rude and did not give a shit about my approach when I tried to explain it to him/her. He said just run code against test cases provided. I received rejection ...read more
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Q1. Convert given Object array into integer list provided object array may contain array of objects
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Q2. Merge given sorted arrays into single sorted array
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Hackearth online coding test for 1 hour

Q1. Dsa question and output questions
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Q2. Find k largest element in an array
Ans. 
Use sorting or heap data structure to find k largest elements in an array of strings.
• Sort the array in descending order and return the first k elements.

• Use a max heap data structure to efficiently find the k largest elements.

• Examples: ['apple', 'banana', 'orange', 'kiwi'], k=2 -> ['orange', 'kiwi']
Answered by AI
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Q1. Remove duplicates from array
Ans. 
Remove duplicates from array of strings
• Create a Set to store unique strings

• Iterate through the array and add each string to the Set

• Convert the Set back to an array to get the unique strings
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Q2. Output related questions on student class object
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Test Duration : 90 mins
Platform : Hackerearth
Number of Questions : 10 ( 5 MCQs + 3 Coding questions + 2 SQL Questions)
Questions were of Easy to Medium Level

Q1. Explain your Projects in brief with their functionality and Technology Stack ?
Ans. 
Developed a web application for project management using React, Node.js, and MongoDB.
• Created a user-friendly interface for project tracking and collaboration

• Implemented authentication and authorization features for secure access

• Utilized React for front-end development, Node.js for back-end, and MongoDB for database management
Answered by AI
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Q2. Cycle Detection in Linked List and another question on one of its variation.
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Q3. Few Questions on Joins, Normalization and SQL were asked.
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Q4. Few Questions on Java, Object Oriented Programming and 3-4 Output based questions were also asked.
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Paper pen coding test

Q1. Easy-medium level sliding window problem
Ans. 
Find the maximum sum of a subarray of size k in an array of integers.
• Use a sliding window approach to keep track of the sum of the current subarray.

• Slide the window by adding the next element and subtracting the previous element.

• Keep track of the maximum sum encountered so far.

• Return the maximum sum found.
Answered by AI
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Q2. Easy-medium level array problem
Ans. 
Find the longest common prefix among an array of strings.
• Iterate through the characters of the first string and compare with other strings.

• Stop when a character doesn't match or reach the end of any string.

• Return the prefix found so far.
Answered by AI
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Q3. Gave me a condition and asked what data structure i would use. Problem was related to data retrieval so we would use hashmaps.
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Q4. They also asked sql queires and dbms related concepts (ACID, etc)
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