C2fo Software Engineer2 Interview Questions and Answers

4 questions , 3 DSA questions medium level and 1 DB design round

Q1. Questions on OOPs, Networking, OS app development, projects and DSA questions
Add your answer

Q1. DB related questions (joins,query) and Linked list medium DSA question.
Add your answer

SQL + Python based questions

Q1. More SQL + simple aptitude problems
Add your answer
Q2. Questions on joins, group by etc. Other questions on average speed, guesstimates.
Add your answer

A data set was given and the questions were asked around strategies to handle cancellations.

The coding test was divided in 4 sections:
1> Java and SpringBoot multiple choice questions
The question topics included, multihreading, springboot context, security

2> Leetcode style program question 1 - Easy

3> Leetcode style program question 2 - Medium
Length of longest consecutive ones by at most one swap.

4> Sql query question

Round duration - 90 minutes
Round difficulty - Medium

This round had 3 coding questions of Medium to Hard level of difficulty.

Q1. 
Intersection of Two Unsorted Arrays Problem Statement
Given two integer arrays ARR1 and ARR2 of sizes 'N' and 'M' respectively, find the intersection of these arrays. The intersection is defined as the se...read more
Ans. 
Find the intersection of two unsorted arrays while maintaining the order of elements from the first array.
• Iterate through the elements of the first array and check if they exist in the second array.

• Use a hash set to keep track of elements already seen in the second array for efficient lookup.

• Maintain the order of elements from the first array while finding the intersection.

• Handle duplicate elements in both arrays appro...read more
Answered by AI
Add your answer
Q2. 
Ways To Make Coin Change
Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make...read more
Ans. 
The task is to determine the total number of ways to make change for a specified value using given denominations.
• Create a function that takes in the number of denominations, the denominations array, and the value to make change for as input

• Use dynamic programming to iterate through all possible combinations of coins to make the specified value

• Keep track of the number of ways to make change for each value from 0 to the ...read more
Answered by AI
Add your answer
Q3. 
Longest Substring Without Repeating Characters Problem Statement
Given a string S of length L, determine the length of the longest substring that contains no repeating characters.
Example:
Input:
"abac...read more
Ans. 
Find the length of the longest substring without repeating characters in a given string.
• Use a sliding window approach to keep track of the longest substring without repeating characters.

• Use a hashmap to store the index of each character in the string.

• Update the start index of the window when a repeating character is encountered.

• Calculate the maximum length of the substring as you iterate through the string.
Answered by AI
View 1 more answer

Round duration - 60 minutes
Round difficulty - Medium

This round started with 2 coding questions and then moved on to some more questions from OOPS.

Q1. 
Palindrome Linked List Problem Statement
You are provided with a singly linked list of integers. Your task is to determine whether the given singly linked list is a palindrome. Return true if it is a pali...read more
Ans. 
Check if a given singly linked list is a palindrome or not.
• Traverse the linked list to find the middle element using slow and fast pointers.

• Reverse the second half of the linked list.

• Compare the first half with the reversed second half to determine if it's a palindrome.
Answered by AI
Add your answer
Q2. 
Search Element in a Rotated Sorted Array
Given a sorted array that has been rotated, the task is to find the index of a specific element. The array is initially sorted in ascending order and then rotated ...read more
Ans. 
Search for an element in a rotated sorted array efficiently in O(logN) time complexity.
• Implement binary search to find the pivot point where rotation occurs.

• Divide the array into two subarrays and perform binary search on the appropriate subarray.

• Handle cases where the element may be in the left or right subarray after rotation.

• Return the index of the element if found, else return -1.
Answered by AI
Add your answer
Q3. What is a static variable in C?
Ans. 
A static variable in C is a variable that retains its value between function calls.
• Declared using the 'static' keyword

• Retains its value throughout the program's execution

• Useful for maintaining state across function calls
Answered by AI
Add your answer
Q4. What is the difference between abstraction and inheritance?
Ans. 
Abstraction is hiding the implementation details while inheritance is a mechanism for creating new classes using existing classes.
• Abstraction focuses on hiding the internal implementation details of a class, allowing the user to only interact with the necessary information.

• Inheritance allows a class to inherit properties and behavior from another class, promoting code reusability and creating a hierarchy of classes.

• Abs...read more
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Medium

This round had questions mainly from HTML,CSS and JavaScript as I had mentioned some Frontend Projects in my resume so the interviewer wanted to check my skills on those. He also asked me some SQL queries and a simple coding question towards the end of the interview.

Q1. What is event bubbling in JavaScript?
Ans. 
Event bubbling is the process where an event triggered on a child element is propagated up through its parent elements.
• In event bubbling, when an event occurs on a child element, it first runs the event handlers on the child element, then on its parent, then all the way up to the top level of the DOM.

• Event bubbling allows for delegation of event handling to a parent element, reducing the number of event listeners neede...read more
Answered by AI
Add your answer
Q2. How can you optimize the loading of website assets?
Ans. 
Optimizing website asset loading involves minimizing file sizes, reducing HTTP requests, utilizing caching, and prioritizing critical resources.
• Minimize file sizes by compressing images, scripts, and stylesheets.

• Reduce HTTP requests by combining files, using sprites, and lazy loading non-essential resources.

• Utilize browser caching to store static assets locally for faster subsequent page loads.

• Prioritize critical resou...read more
Answered by AI
Add your answer
Q3. In how many ways can you display HTML elements?
Ans. 
There are multiple ways to display HTML elements, including inline, block, inline-block, and flex.
• HTML elements can be displayed as inline, which allows them to flow with surrounding content.

• Block elements take up the full width available and start on a new line.

• Inline-block elements are displayed as blocks, but flow like inline elements.

• Flexbox allows for more advanced layout options, such as aligning items and distri...read more
Answered by AI
Add your answer
Q4. 
Check if Two Strings are Anagrams
Anagrams are words or names that can be formed by rearranging the letters of another word. For instance, 'spar' can be rearranged to form 'rasp', making them anagrams.
E...read more
Ans. 
Check if two strings are anagrams by rearranging their letters.
• Create a frequency map of characters for both strings

• Compare the frequency maps to check if they are equal

• Return True if the frequency maps are equal, else False
Answered by AI
Add your answer

Round duration - 30 minutes
Round difficulty - Easy

This is a cultural fitment testing round. HR was very frank and asked standard questions. Then we discussed about my role.

Q1. What is something about you that is not included in your resume?
Add your answer
Q2. Why should we hire you?
Ans. 
I bring a unique blend of technical skills, problem-solving abilities, and a passion for innovation that aligns with your team's goals.
• Proven experience in developing scalable applications, such as a recent project where I improved load times by 30%.

• Strong proficiency in multiple programming languages, including Python and Java, which allows me to adapt to your tech stack quickly.

• Excellent teamwork and communication sk...read more
Answered by AI
Add your answer

There were 3 coding and 1 SQL question.

Q1. This was regarding the coding test on your approach and how you came with that answer
Add your answer

Q1. Some technical questions about programming were there to know about your understanding with coding
Add your answer

Q1. Your overall experience
Ans. 
I have over 10 years of experience in project management, team leadership, and process optimization across various industries.
• Led a team of 15 in a successful software development project, improving delivery time by 30%.

• Implemented Agile methodologies, resulting in a 25% increase in team productivity.

• Conducted training sessions for new team members, enhancing onboarding efficiency.

• Managed cross-functional teams, foster...read more
Answered by AI
Add your answer
Q2. Why Practo and reason to change the JOB
Add your answer

Coding test based on Binary trees, String Manipulation