Endurance International Group Interview Experience (on-campus)

Endurance International Group came to our campus for full-time hires. Positions: Software Engineer and Operations Engineer It was open to all the branches. Approximately, 450 people sat for the interview process. There were 1 MCQ round, 1 coding round followed by 3 PI rounds. Round 1 (MCQ): Time: 45 minutes Questions: 45 multiple choice questions Format: we had to write down our answers on a piece of paper and then upload the answers on their website designed for the test. The questions were from OS, DBMS, Networking, DS and algorithms, C/C++. The questions tested basic concepts of Computer Science and were not too difficult. Approximately 100 people made it to the 2nd round. Round 2 (Coding round): Time: 2.5 hours Questions: 5 We could use our own laptop using any IDE of our choice. No internet access was provided. We had to build a simple text processing tool using a language of our choice (C, C++, Java, Python Ruby, PHP,etc). Documentations were provided for each one of the languages mentioned. The questions were like this: Given a file contacts.txt: Amit,Shah,+9800123456 Pramit,Singh,+9801345678 Shalini,Shah,+9801341876 Solve the following questions: 1. If "program_name input_file column_no" is executed, print the column from to the input file. For example, ./awkward contacts.txt 1 The output will be: Amit Pramit Shalini 2. If "program_name input_file column_no pattern" is executed, print the strings from the given column only if the pattern is contained in them. For example, ./awkward contacts.txt 1 mi The output will be: Amit Pramit 3. If "program_name input_file column_no ^pattern " or "program_name input_file column_name pattern$" is executed, print the strings from the given column only if:       a) the strings starts with the given pattern (if ^pattern is provided)       b) the strings end with the given pattern (if pattern$ is provided) For example, ./awkward contacts.txt 1 ^Am The output will be: Amit 4. Now, instead of input_file parameter, a directory name will be given. The program should process all the files contained in the directory as done in problem 1 to 3. we have a directory "test" and 2 files "contacts.txt" , "newcontacts.txt" inside it. test/contacts.txt: Amit,Shah,+9800123456 Pramit,Singh,+9801345678 Shalini,Shah,+9801341876 test/newcontacts.txt: John,Doe,+9800123456 Aman,Verma,+9801345678 Shalu,Singh,+9801341876 ./awkward test 1 ^Sh Output: test/contacts.txt =================== Shalini test/newcontacts.txt ==================== Shalu 5. Now, do 1-4 for all the files in the subdirectories given directory name as a parameter. If no matches were found in any given file, make sure not to print anything corresponding to that file. test       subdir1             a.txt             b.txt       subdir2             c.txt             d.txt command: ./awkward test column_name ^pattern and pattern matched the files test/subdir1/a.txt and test/subdir2/b.txt output: test/subdir1/a.txt ================== some_string1 some_string2 test/subdir2/b.txt ================== some_string1 some_string2 Approximately 15 people made it to the PI. Questions were asked mainly from OS, DBMS and Networking. Questions were also asked on Projects and Internships which I have mentioned in my resume. A lot of questions were asked. I'll try to add as many as I can remember. Round 3 (PI): . I was asked what I liked about Computer Science. . State the entire Boot process of Linux OS. . What is a kernel? State all the functions of the kernel. What is the difference between OS and Kernel? . What are different kinds of HTTP requests? What is the difference between PUT and POST? . How does email work? Mention the entire process of sending and receiving an email. . What is SMTP? . What are TCP/IP and UDP? what are the differences between them? . What are IMAP and POP3? What are the differences between them? Mention a sequence when using POP3 protocol would be useful. . What are ARP and RARP protocols? . Describe the OSI layers. . What is IP address? What is a MAC address? How do they differ? . What is the difference between router and switch? . Why is a MAC address necessary? . What is DNS? What kind of protocol is used to make a request to the DNS server? . What kind of protocols are used in Instant Messaging Applications? Why? . I had mentioned 3 projects in my resume. I was asked to explain the projects in the order of my preference. He asked me questions on topics related to the project. We had a detailed discussion about the projects and my role in each of these projects. . What is Normalization? Normalize a given table. . What is indexing in DBMS? . What is DDL and DML? . What is git? Difference between git fork and git merge. . I was asked which role (Software Engineer/Operations) I would prefer and why? Round 4 (PI): . What happens when I type in a URL on the browser address bar and hit "Enter" ? Describe the entire process. . How does a web server work? . How does a web server know which resources to fetch based on the request? . What is DNS? How does a OS know which DNS server to make a request to? Explain DNS hierarchy. . Explain root DNS server. . I was asked to explain the projects. Again, we had a detailed discussion on them. . Explain the email architecture. If an email is sent from a yahoo mail account to a gmail account, how does the email actually get sent? . What is virtual memory? What is the need for it? . How to know the memory usage in Linux? . How to know the memory usages by various processes in Linux? . What is a semaphore? . What is race-condition? . What is dead-lock? . What is indexing in DBMS? Round 5 (PI): . Questions on a particular project mentioned in the resume. . Design a cache. I had to ask a lot of questions to get to know the specific requirements of the design. We had a detailed discussion about various approaches. Pros and cons of my design were discussed. I was asked various questions on my choice of data structures. Like, in one of my approaches I had mentioned heap. So, questions were asked about the insertion/deletion/updation in the heap data structure, how it achieves O(logn) for insertion/deletion. . Questions on threads and locks related to the cache design. . How would the design be modified if the cache were to be made available for use over a network? Thanks Geeksforgeeks. Hope it will be helpful to other aspirants. :-)