Cointab SDE Interview Questions and Answers

The test consisted of questions ranging from easy to medium on Leetcode. It was a 90 min round and can be efficiently completed well within 60 min

The was a design problem slightly skewed on the DSA side related to N-arry lockable tree, something similar to the Tree of Space problem on GFG.

This round was a build-up on the previous one with the task of adding concurrency to the operations defined in last problem

Q1. The interview round lasted a little over 60 min, comprised of a DSA medium question and a low-level design question, and was followed up with a series of leading core questions based on OS and COA.
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Q2. The problem was getting on the stack in constant time; the optimization was the trick
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Puzzle based questions and Math problems

Given a laptop and problem statement. Had to solve problems at eclipse.

Q1. F2F one on one technical interview
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60 minutes of coding round with medium level of question asked

Coding and Aptitude MCQ questions

Q1. How i can design a login system for client?
Ans. 
Designing a login system for clients involves creating secure authentication methods and user management.
• Implement secure password hashing algorithms like bcrypt to store passwords securely.

• Use HTTPS to encrypt data transmission between client and server.

• Implement multi-factor authentication for added security.

• Utilize session management to keep track of user login status.

• Consider implementing account lockout mechanisms
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Q2. What is foreign key and how you can you can use foreign key in your DBMS system?
Ans. 
Foreign key is a key used to link two tables in a database, enforcing referential integrity.
• Foreign key is a column or a set of columns in one table that references the primary key in another table.

• It ensures that the values in the foreign key column(s) match the values in the primary key column of the referenced table.

• Foreign key constraints help maintain data integrity by preventing actions that would destroy links b...read more
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Q1. What is the shortest distance between two farthest vertices in a cubical room
Ans. 
The shortest distance between two farthest vertices in a cubical room is the length of the diagonal of the cube.
• The diagonal of a cube can be calculated using the formula: sqrt(3) * side length

• In a cube with side length 1 unit, the diagonal length is sqrt(3) units

• Therefore, the shortest distance between two farthest vertices in a cubical room is sqrt(3) times the side length of the cube
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Q2. A root 5 is the ans
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Lit bit tougher as a beginner for quants like aptitude, verbal, and reasoning.

They given 40 min for coding and , topics are below linked list , stacks

They given 30 min for coding in topics of linked list , stacks

Q1. 3 EMERGING TECHNOLOGIES
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Basic Aptitude test, it was easy

Questions on array medium level

Q1. Array questions
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Q1. Tell me about yourself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Team player with excellent communication skills
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Q2. Where do you see yourself
Ans. 
I see myself continuing to grow and develop my skills in a challenging and rewarding role.
• Continuing to learn new technologies and stay updated with industry trends

• Taking on more responsibilities and leadership roles

• Contributing to the success and growth of the company

• Striving for personal and professional growth
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