Paytm Software Engineer Interview Questions, Process, and Tips

Count the number of continuous sequences with equal number of 0's and 1's in an array.

• Iterate through the array and keep track of the count of 0's and 1's encountered so far.

• Store the difference between the counts in a hash table and increment the count for that difference.

• If the difference is already present in the hash table, add the count to the existing value.

• Return the sum of all values in the hash table.

Count the number of palindromic substrings in a given string.

• A substring is a contiguous sequence of characters within a string.

• A palindrome is a string that reads the same backward as forward.

• Use dynamic programming to count all palindromic substrings.

• Time complexity can be reduced to O(n^2) using Manacher's algorithm.

Find the longest palindrome in a given string in linear time complexity.

• Use Manacher's algorithm to find the longest palindrome in a string in O(n) time complexity.

• The algorithm involves preprocessing the string to add special characters to handle even and odd length palindromes.

• Then, it uses a combination of dynamic programming and symmetry properties to find the longest palindrome.

• For example, in the string 'babad',

The value of pie is a mathematical constant approximately equal to 3.14159.

• Pie is the ratio of the circumference of a circle to its diameter.

• It is an irrational number, meaning it cannot be expressed as a finite decimal or fraction.

• Pie is commonly used in geometry and trigonometry calculations.

• The value of pie is often approximated as 3.14 or 22/7.

I am a passionate software engineer with experience in developing 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 deployment tools like Docker

• Strong problem-solving skills and ability

Yes, I believe I will be able to fit in the company based on my experience, skills, and values.

• I have experience working in diverse teams and adapting to different work cultures.

• I share the company's values and vision, which align with my own.

• I am eager to learn and contribute to the team, fostering a positive work environment.

• I have strong communication skills, which are essential for collaboration and teamwork.