Newfold Digital Operations Engineer Interview Questions and Answers

Round 1: MCQ Test [60 Minutes]

Topics: Computer Networks, Operating Systems, Object-Oriented Concepts, Linux commands and operations, System Design and Architecture.

Please be cautious while answering, as there is a negative marking system in place.

Half of the students were eliminated during this round.

Difficulty Level: Moderate to High.

Two coding questions based on Strings.

String Minimization
Task: Minimize the length of a string (S) consisting of ‘a, ‘b’, and ‘c’.
Operation: Split the string into two non-empty parts and append the left part to the right part.
Special Rule: While appending, remove matching characters from the boundaries of the appended portions.
Objective: Find the shortest possible resulting string length.


Cyclic Shift
Input:
Integer N represented as a 16-bit binary.
Integer ‘m’ represents the number of positions to shift.
Character ‘c’ can be either ‘L’ for a left shift or ‘R’ for right shift.
Task: Determine the number ‘M’ generated after cyclically shifting the binary representation of N by ‘m’ positions, based on the direction specified by ‘c’ (‘L’ for left, ‘R’ for right).


One SQL query question
Basic SQL query which involved the use of DISTINCT, GROUP BY and NOT IN operators.

Q1. Key Focus: Fundamental concepts of Operating Systems: Process life cycle, Deadlock, and its recovery What is MBR? What is init? and what is its priority Change in modes and file ownership Default file per...read more
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Q2. Computer Networks: Explain all layers in the OSI model and your understanding of these layers. HTTP status codes and their meaning, encryption and decryption techniques, and various protocols at different...read more
Ans. 
Explanation of OSI model layers, HTTP status codes, encryption techniques, security assessment, networking protocols, common ports, and TCP/UDP use cases.
• OSI model layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• HTTP status codes: 200 OK, 404 Not Found, 500 Internal Server Error

• Encryption techniques: AES, RSA, DES

• Security assessment: Vulnerability scanning, Penetration testing, Securi...read more
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Q3. Database Management Systems (DBMS): Joins, DDL, DML, TCL, schema, anomalies Concurrency control, backup, and recovery SQL and NoSQL differences, followed by a stepwise explanation of the normalization pro...read more
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Q4. Scenario based question : 1. What happens when you type -----. The interviewer expected a detailed response, starting from DNS and browser cache to Routing Protocols and TCP 3-way Handshake. This alone t...read more
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Q1. Interviewers: Two senior interviewers, each with over 10 years of experience. This round proved to be more challenging than the previous one. The initial part of this interview concentrated on the skills ...read more
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Q2. Operating Systems: Paging, caching, deadlock Multithreading, multitasking Race conditions, semaphores Modular, Monolithic, Microkernel approaches Process states, daemons, and zombie processes. Linux: Fe...read more
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Q3. System Design: The interviewer asked how I would handle a large-scale influx of traffic on a website. The interviewer expected me to discuss Load balancing, Vertical and Horizontal Scaling, Caching, Datab...read more
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Q1. Round 5: HR Interview [30-45 Minutes] Interviewers: Two HR interviewers. Objective: This stage aims to familiarize the interviewers with the candidate. Standard HR questions were posed, about the streng...read more
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Contents
Os
DBMS
Unix
Networking

Three coding questions were given talview platform.

Q1. Technical interview contains networking questions which was of 1 hour.
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