Revolut Intern Interview Questions and Answers

Q1. Technical questions based on projects
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Q2. Based on sql questions were asked
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Two Coding questions were asked -
1- Graph Connectivity with threshold
2-Find length of longest subsequence of one string which is substring of another string

Q1. N-Queens, Snake and Ladder Problem, Second Most repeated word in a sequence
Ans. 
These are three different programming problems that require different approaches to solve.
• N-Queens: placing N queens on an NxN chessboard so that no two queens threaten each other

• Snake and Ladder Problem: finding the minimum number of dice rolls to reach the end of a board with snakes and ladders

• Second Most Repeated Word in a Sequence: finding the second most frequently occurring word in a given sequence of words
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Q2. Replace every element with the greatest element on the right side
Ans. 
Replace each element with the greatest element on its right side in the array
• Loop through the array from right to left

• Keep track of the maximum element seen so far

• Replace the current element with the maximum element seen so far

• Return the modified array
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Q3. Special Keyboard DP Problem
Ans. 
The Special Keyboard DP Problem involves optimizing key presses for a specific output using dynamic programming.
• Identify the target string and the available keys on the keyboard.

• Use dynamic programming to calculate the minimum key presses needed.

• Consider edge cases, such as repeated characters or missing keys.

• Example: If the target is 'abc' and keys are 'a', 'b', 'c', the answer is 3.

• Example: If the target is 'aaa' and...read more
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The test was entirely MCQ based and the entire paper was on devops. Question standard was average.

Q1. It was entirely resume based.
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Q1. Based on your power skill in your resume.
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It was campus through internship

Q1. So it was through college so they did not ask me more
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Q2. Tell me about self Why investment banking
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Q1. Basic sql and java questions
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Q1. Tell me about yourself
Ans. 
I am a recent graduate with a degree in Computer Science and a passion for coding and problem-solving.
• Graduated with a degree in Computer Science

• Passionate about coding and problem-solving

• Completed internships at tech companies

• Participated in coding competitions
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2 hours HackerEarth coding round

Q1. Some medium level of question
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HackerEarth test medium level question

On spot topic were given by the interviewer

Q1. OOPS ,DBMS ,OS, CN concepts
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Q2. Data structures and codes based on it
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Q1. Sorting algorithm
Ans. 
Sorting algorithms are used to arrange elements in a specific order.
• Sorting algorithms can be categorized as comparison-based or non-comparison-based.

• Examples of sorting algorithms include Bubble Sort, Merge Sort, and Quick Sort.

• Efficiency of sorting algorithms is measured in terms of time complexity and space complexity.
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Q2. Secod highest salary
Ans. 
To find the second highest salary, we can use various methods like sorting or using a set to eliminate duplicates.
• Use a SQL query: SELECT DISTINCT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 1;

• In Python, convert the salary list to a set, sort it, and access the second last element.

• Example: salaries = [3000, 2000, 4000, 4000]; sorted(set(salaries))[-2] gives 3000.

• Consider edge cases: If there is only one u...read more
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