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Newfold Digital Operations Engineer Interview Questions and Answers

Updated 16 Oct 2023

Newfold Digital Operations Engineer Interview Experiences

2 interviews found

Operations Engineer Interview Questions & Answers

user image Mohammed Huzaifa M D

posted on 16 Oct 2023

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed in Sep 2023. There were 6 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Be truthful in your resume. It is very easy to catch false or lies during the interview by asking basic questions.
View all tips
Round 2 - Aptitude Test 

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.

Round 3 - Coding Test 

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.

Round 4 - Technical 

(4 Questions)

  • 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...
  • 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...
  • 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...

  • Answered by AI
  • 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...
  • 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...
Round 5 - Technical 

(3 Questions)

  • 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 ...
  • Q2. Operating Systems: Paging, caching, deadlock Multithreading, multitasking Race conditions, semaphores Modular, Monolithic, Microkernel approaches Process states, daemons, and zombie processes. Linux: Fe...
  • 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...
Round 6 - HR 

(1 Question)

  • 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...

Interview Preparation Tips

Interview preparation tips for other job seekers - Wish you All the very best, in all your Future Endeavors. !!!

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Double-check your resume for any spelling mistakes. The recruiter may consider spelling mistakes as careless behavior or poor communication skills.
View all tips
Round 2 - Aptitude Test 

Contents
Os
DBMS
Unix
Networking

Round 3 - Coding Test 

Three coding questions were given talview platform.

Round 4 - Technical 

(1 Question)

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

Operations Engineer Interview Questions Asked at Other Companies

Q1. 1)What is differential? 2)What is your favorite subject? 3)Define ... read more
Q2. Computer Networks: Explain all layers in the OSI model and your u ... read more
Q3. 2.What is FIFO and LIFO, where you implemented this?
Q4. Why there is height b/w Dearetor and BFP? Boiler turbine efficien ... read more
Q5. How to uses housekeeping person for avoid any fault during runnin ... read more

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before May 2023. There was 1 interview round.

Round 1 - One-on-one 

(1 Question)

  • Q1. Operating systems, networking and distributed systems questions
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Jul 2024. There were 3 interview rounds.

Round 1 - HR 

(1 Question)

  • Q1. Basic details around experience
Round 2 - One-on-one 

(1 Question)

  • Q1. Basic details and system design
Round 3 - Technical 

(1 Question)

  • Q1. Coding for a solution
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I was interviewed in Sep 2024.

Round 1 - Coding Test 

There were questions on String manipulation and sorting

Round 2 - Technical 

(2 Questions)

  • Q1. Java 8 features
  • Q2. Method reference
Interview experience
3
Average
Difficulty level
Hard
Process Duration
2-4 weeks
Result
Selected Selected

I was interviewed in Jan 2025.

Round 1 - Interview Questions 

(20 Questions)

  • Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
  • Ans. 

    ArrayList and LinkedList are both implementations of the List interface in Java. ArrayList uses a dynamic array to store elements, while LinkedList uses a doubly linked list.

    • ArrayList is more efficient for random access and traversal, while LinkedList is better for frequent insertions and deletions.

    • ArrayList uses less memory overhead due to storing elements in a contiguous block of memory, while LinkedList requires ext...

  • Answered by AI
  • Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
  • Ans. 

    Using Java's synchronized keyword for thread synchronization has advantages like simplicity and disadvantages like potential deadlocks. ReentrantLock offers more flexibility and control.

    • Advantages of synchronized keyword: easy to use, built-in support in Java, ensures mutual exclusion

    • Disadvantages of synchronized keyword: potential for deadlocks, limited flexibility

    • ReentrantLock advantages: more control over locking, a...

  • Answered by AI
  • Q3. What is the difference between == and .equals() in Java? When should each be used, and what issues can arise from improper usage?
  • Ans. 

    In Java, == compares memory addresses while .equals() compares the actual values of objects.

    • Use == to compare primitive data types and to check if two objects reference the same memory address.

    • Use .equals() to compare the actual values of objects, especially for String comparison.

    • Improper usage can lead to unexpected results, such as comparing memory addresses instead of values.

  • Answered by AI
  • Q4. How does the Java garbage collector work? Can you describe the different types of garbage collection algorithms available in Java?
  • Ans. 

    The Java garbage collector automatically manages memory by reclaiming unused objects.

    • Java garbage collector runs in the background to identify and remove objects that are no longer needed.

    • Different types of garbage collection algorithms in Java include Serial, Parallel, CMS, G1, and Z Garbage Collector.

    • For example, the Serial garbage collector uses a single thread for garbage collection, while the Parallel garbage coll...

  • Answered by AI
  • Q5. What are the main features of Java 8? Can you explain how lambdas and the Stream API have changed the way Java applications are written?
  • Ans. 

    Java 8 introduced features like lambdas and Stream API which have revolutionized the way Java applications are written.

    • Lambdas allow for more concise and readable code by enabling functional programming paradigms.

    • Stream API provides a way to process collections of objects in a functional style, allowing for easier parallel processing and improved performance.

    • Java 8 also introduced default methods in interfaces, allowin...

  • Answered by AI
  • Q6. Describe the differences between checked and unchecked exceptions in Java. Provide examples and explain how to handle them properly.
  • Ans. 

    Checked exceptions are checked at compile time, while unchecked exceptions are not. Proper handling involves either catching or declaring the exception.

    • Checked exceptions must be either caught or declared in the method signature using 'throws'. Example: IOException.

    • Unchecked exceptions do not need to be caught or declared. Example: NullPointerException.

    • Proper handling of exceptions involves using try-catch blocks for c...

  • Answered by AI
  • Q7. What is the Java Memory Model, and how does it affect multithreading and synchronization? How does volatile help ensure memory visibility?
  • Ans. 

    The Java Memory Model defines how threads interact through memory and how changes made by one thread are visible to others.

    • Java Memory Model ensures that threads have a consistent view of shared memory.

    • It defines the rules for reading and writing variables in a multithreaded environment.

    • Synchronization ensures that only one thread can access a shared resource at a time.

    • Volatile keyword in Java ensures visibility of cha...

  • Answered by AI
  • Q8. Can you explain the difference between method overloading and method overriding in Java? Provide examples where each should be used.
  • Ans. 

    Method overloading involves creating multiple methods in the same class with the same name but different parameters. Method overriding involves creating a new implementation of a method in a subclass.

    • Method overloading is used to provide multiple methods with the same name but different parameters, allowing for flexibility in method calls.

    • Method overriding is used to provide a new implementation of a method in a subcla...

  • Answered by AI
  • Q9. What are functional interfaces in Java? How do they work with lambda expressions? Provide an example of a custom functional interface.
  • Ans. 

    Functional interfaces in Java are interfaces with a single abstract method. They can be used with lambda expressions for functional programming.

    • Functional interfaces have only one abstract method, but can have multiple default or static methods.

    • Lambda expressions can be used to implement the abstract method of a functional interface concisely.

    • An example of a custom functional interface is 'Calculator' with a single abs

  • Answered by AI
  • Q10. What is a Java Stream, and how does it differ from an Iterator? Explain how Streams can be used to process collections efficiently.
  • Ans. 

    Java Stream is a sequence of elements that supports functional-style operations. It differs from Iterator by being more declarative and allowing parallel processing.

    • Java Stream is a high-level abstraction over collections that allows for functional-style operations like map, filter, reduce, etc.

    • Streams are more declarative compared to Iterators, which are imperative. This means you specify what you want to do rather th...

  • Answered by AI
  • Q11. Explain the concept of immutability in Java. How does the String class achieve immutability, and what are the advantages of immutable objects?
  • Ans. 

    Immutability in Java means objects cannot be modified after creation. String class achieves immutability by not allowing changes to its value.

    • Immutability means once an object is created, its state cannot be changed.

    • String class achieves immutability by making its value final and not providing any methods to modify it.

    • Advantages of immutable objects include thread safety, caching, and easier debugging.

    • Example: String s...

  • Answered by AI
  • Q12. What is the difference between final, finally, and finalize in Java? Provide examples to illustrate their usage.
  • Ans. 

    final, finally, and finalize have different meanings in Java.

    • final is a keyword used to restrict the user from changing the value of a variable, making it a constant.

    • finally is a block of code that is always executed, whether an exception is thrown or not.

    • finalize is a method used for cleanup operations before an object is garbage collected.

  • Answered by AI
  • Q13. Explain the Singleton design pattern in Java. How can you implement it safely to ensure thread safety?
  • Ans. 

    Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

    • Create a private static instance of the class within the class itself.

    • Provide a public static method to access the instance, creating it if necessary.

    • Ensure the constructor is private to prevent instantiation from outside the class.

    • Use synchronized keyword or double-checked locking to ensure thread safety.

  • Answered by AI
  • Q14. What are Java annotations, and how are they used in frameworks like Spring? Explain the difference between built-in and custom annotations.
  • Ans. 

    Java annotations are metadata that provide data about a program but do not affect the program itself. They are used in frameworks like Spring to configure and customize behavior.

    • Java annotations are used to provide metadata about a program, such as information about classes, methods, or fields.

    • In frameworks like Spring, annotations are used to configure various aspects of the application, such as defining beans, handli...

  • Answered by AI
  • Q15. How do Java Streams handle parallel processing? What are the potential pitfalls of using parallel streams, and how can they be mitigated?
  • Ans. 

    Java Streams can handle parallel processing using parallel streams. Pitfalls include increased complexity and potential for race conditions.

    • Java Streams can be processed in parallel by using the parallelStream() method.

    • Potential pitfalls of using parallel streams include increased complexity, potential for race conditions, and increased resource consumption.

    • To mitigate these pitfalls, ensure that the operations perform...

  • Answered by AI
  • Q16. Explain the difference between ArrayList and LinkedList in Java. ArrayList is implemented as a dynamic array, while LinkedList is a doubly linked list. ArrayList provides fast random access (O(1) complexi...
  • Ans. 

    ArrayList is preferred for frequent retrieval operations, while LinkedList is suitable for frequent insertions/deletions.

    • Use ArrayList when you need fast random access and retrieval operations, such as searching for elements in a list.

    • Choose LinkedList when you need fast insertions/deletions, especially at the beginning or end of the list.

    • Consider memory overhead and performance trade-offs when deciding between ArrayLi...

  • Answered by AI
  • Q17. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? The synchronized keyword ensures that only one thread can access a block of code at a time. It pr...
  • Ans. 

    ReentrantLock should be used instead of synchronized when more flexibility and control over locking mechanisms is needed.

    • Use ReentrantLock when you need to implement fair locking mechanisms.

    • ReentrantLock provides tryLock() and lockInterruptibly() methods for more control over locking.

    • Explicit unlocking in ReentrantLock reduces the chance of deadlocks compared to synchronized.

  • Answered by AI
  • Q18. What is the difference between == and .equals() in Java? == checks for reference equality, meaning it compares memory addresses. equals() checks for value equality, which can be overridden in user-defined...
  • Ans. 

    In Java, == checks for reference equality while equals() checks for value equality. Misuse of == can lead to logical errors.

    • Override equals() when you want to compare the actual content of objects in user-defined classes.

    • Override hashCode() alongside equals() to ensure proper functioning in collections like HashMap.

    • Implement the Comparable interface and override compareTo() for natural ordering of objects.

  • Answered by AI
  • Q19. How does the Java garbage collector work? Garbage collection in Java automatically reclaims memory occupied by unused objects. The JVM has different types of GC algorithms, including Serial, Parallel, CMS...
  • Ans. 

    Garbage collection in Java automatically reclaims memory occupied by unused objects using different algorithms and memory regions.

    • Garbage collection in Java automatically reclaims memory occupied by unused objects

    • Different types of GC algorithms in JVM: Serial, Parallel, CMS, and G1 GC

    • Objects are managed in Young Generation, Old Generation, and PermGen/Metaspace

    • Minor GC cleans up short-lived objects in Young Generation

    • ...

  • Answered by AI
  • Q20. What are the main features of Java 8? Java 8 introduced lambda expressions, enabling functional-style programming. The Stream API allows efficient data processing with map, filter, and reduce operations. ...
  • Ans. 

    Lambda expressions in Java 8 improve readability and maintainability by enabling concise and functional-style programming.

    • Lambda expressions allow writing more compact code by removing boilerplate code.

    • They make code more readable by focusing on the behavior being implemented rather than the mechanics of implementation.

    • Lambda expressions promote functional programming paradigms, making code easier to understand and mai...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed in Dec 2024. There was 1 interview round.

Round 1 - HR 

(2 Questions)

  • Q1. Tell me about your self
  • Q2. What is oops dbms and sql query
  • Ans. 

    OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, DBMS (Database Management System) is software for managing databases, and SQL (Structured Query Language) is a language used to communicate with databases.

    • OOPs focuses on creating objects that contain data and methods to manipulate that data.

    • DBMS is a software system that allows users to interact with a database, storing and r...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - learn basics of oops dbms dsa and software eng
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected Selected

I was interviewed in Jan 2025.

Round 1 - Interview Questions 

(20 Questions)

  • Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
  • Ans. 

    ArrayList and LinkedList are both classes in Java that implement the List interface, but they have different underlying data structures.

    • ArrayList uses a dynamic array to store elements, providing fast random access but slower insertion and deletion.

    • LinkedList uses a doubly linked list to store elements, providing fast insertion and deletion but slower random access.

    • Choose ArrayList when you need fast random access and ...

  • Answered by AI
  • Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
  • Ans. 

    Using Java's synchronized keyword for thread synchronization has advantages like simplicity and disadvantages like potential for deadlock. ReentrantLock offers more flexibility and control.

    • Advantages of synchronized keyword: simplicity, built-in support in Java

    • Disadvantages of synchronized keyword: potential for deadlock, lack of flexibility

    • ReentrantLock advantages: more flexibility, ability to try and lock with timeou...

  • Answered by AI
  • Q3. What is the difference between == and .equals() in Java? When should each be used, and what issues can arise from improper usage?
  • Ans. 

    In Java, == compares memory addresses while .equals() compares the actual values of objects.

    • Use == to compare primitive data types or to check if two objects reference the same memory location.

    • Use .equals() to compare the actual values of objects, especially for String comparisons.

    • Improper usage can lead to unexpected results, such as comparing objects instead of their values.

  • Answered by AI
  • Q4. How does the Java garbage collector work? Can you describe the different types of garbage collection algorithms available in Java?
  • Ans. 

    Java garbage collector manages memory by automatically deallocating memory that is no longer in use.

    • Java garbage collector runs in the background and identifies objects that are no longer reachable by the application.

    • It uses different algorithms like Mark-Sweep, Mark-Compact, and Copying to reclaim memory.

    • Mark-Sweep algorithm identifies and marks objects for deletion, then sweeps through and deallocates them.

    • Mark-Compa...

  • Answered by AI
  • Q5. What are the main features of Java 8? Can you explain how lambdas and the Stream API have changed the way Java applications are written?
  • Ans. 

    Java 8 introduced features like lambdas and Stream API which have revolutionized the way Java applications are written.

    • Lambdas allow for more concise and readable code by enabling functional programming style.

    • Stream API provides a way to process collections of objects in a functional way, allowing for easier parallel processing and improved performance.

    • Java 8 also introduced default methods in interfaces, allowing for ...

  • Answered by AI
  • Q6. Describe the differences between checked and unchecked exceptions in Java. Provide examples and explain how to handle them properly.
  • Ans. 

    Checked exceptions must be handled at compile time, while unchecked exceptions do not need to be caught or declared.

    • Checked exceptions are subclasses of Exception class, while unchecked exceptions are subclasses of RuntimeException class.

    • Checked exceptions must be caught or declared in the method signature using 'throws', while unchecked exceptions do not have this requirement.

    • Examples of checked exceptions include IOE...

  • Answered by AI
  • Q7. What is the Java Memory Model, and how does it affect multithreading and synchronization? How does volatile help ensure memory visibility?
  • Ans. 

    The Java Memory Model defines how threads interact through memory and how synchronization ensures visibility and consistency.

    • Java Memory Model specifies how threads interact with memory

    • Synchronization ensures visibility and consistency of shared data among threads

    • Volatile keyword ensures changes made by one thread are immediately visible to other threads

    • Example: Using volatile keyword to share a boolean flag among mult

  • Answered by AI
  • Q8. Can you explain the difference between method overloading and method overriding in Java? Provide examples where each should be used.
  • Ans. 

    Method overloading is when multiple methods have the same name but different parameters, while method overriding is when a subclass provides a specific implementation of a method in its superclass.

    • Method overloading is achieved within the same class by having multiple methods with the same name but different parameters.

    • Method overriding occurs in a subclass that provides a specific implementation of a method that is al...

  • Answered by AI
  • Q9. What are functional interfaces in Java? How do they work with lambda expressions? Provide an example of a custom functional interface.
  • Ans. 

    Functional interfaces in Java are interfaces with a single abstract method. They can be used with lambda expressions for functional programming.

    • Functional interfaces have only one abstract method, but can have multiple default or static methods.

    • Lambda expressions can be used to implement the abstract method of a functional interface concisely.

    • An example of a custom functional interface is 'Calculator' with a single abs

  • Answered by AI
  • Q10. What is a Java Stream, and how does it differ from an Iterator? Explain how Streams can be used to process collections efficiently.
  • Ans. 

    Java Stream is a sequence of elements that supports functional-style operations. It differs from Iterator by being more declarative and allowing for parallel processing.

    • Java Stream is a high-level abstraction over collections that allows for functional-style operations like map, filter, reduce, etc.

    • Streams are more declarative compared to Iterators, which are imperative. This means that with Streams, you specify what y...

  • Answered by AI
  • Q11. Explain the concept of immutability in Java. How does the String class achieve immutability, and what are the advantages of immutable objects?
  • Ans. 

    Immutability in Java means objects cannot be modified after creation. String class achieves immutability by not allowing changes to its value.

    • Immutability means once an object is created, its state cannot be changed.

    • String class in Java is immutable because its value cannot be modified once it is assigned.

    • Advantages of immutable objects include thread safety, security, and ease of caching.

  • Answered by AI
  • Q12. What is the difference between final, finally, and finalize in Java? Provide examples to illustrate their usage.
  • Ans. 

    final, finally, and finalize have different meanings in Java.

    • final is a keyword used to restrict the user from changing the value of a variable, making it a constant.

    • finally is a block of code that is always executed, whether an exception is thrown or not.

    • finalize is a method used for cleanup operations before an object is garbage collected.

  • Answered by AI
  • Q13. Explain the Singleton design pattern in Java. How can you implement it safely to ensure thread safety?
  • Ans. 

    Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

    • Create a private static instance of the class within the class itself.

    • Provide a public static method to access the instance, creating it if necessary.

    • Make the constructor private to prevent instantiation from outside the class.

    • Use synchronized keyword or double-checked locking to ensure thread safety.

  • Answered by AI
  • Q14. What are Java annotations, and how are they used in frameworks like Spring? Explain the difference between built-in and custom annotations.
  • Ans. 

    Java annotations are metadata that provide data about a program but do not affect the program itself. They are used in frameworks like Spring to configure and customize behavior.

    • Java annotations are used to provide metadata about classes, methods, fields, etc. in a program.

    • In frameworks like Spring, annotations are used to configure various aspects of the application, such as dependency injection, transaction managemen...

  • Answered by AI
  • Q15. How do Java Streams handle parallel processing? What are the potential pitfalls of using parallel streams, and how can they be mitigated?
  • Ans. 

    Java Streams can handle parallel processing using parallel streams. Pitfalls include increased complexity and potential for race conditions.

    • Java Streams can be processed in parallel by calling the parallel() method on a stream.

    • Potential pitfalls of using parallel streams include increased complexity, potential for race conditions, and performance overhead due to thread management.

    • To mitigate these pitfalls, ensure that...

  • Answered by AI
  • Q16. Explain the difference between ArrayList and LinkedList in Java. ArrayList is implemented as a dynamic array, while LinkedList is a doubly linked list. ArrayList provides fast random access (O(1) complexi...
  • Ans. 

    ArrayList is preferred for frequent retrieval operations due to fast random access, while LinkedList is suitable for frequent insertions/deletions with fast O(1) complexity.

    • Use ArrayList for scenarios where frequent retrieval operations are needed, such as searching for elements in a large collection.

    • Choose LinkedList when frequent insertions/deletions are required, like maintaining a queue or stack with dynamic size.

    • C...

  • Answered by AI
  • Q17. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? The synchronized keyword ensures that only one thread can access a block of code at a time. It pr...
  • Ans. 

    ReentrantLock should be used instead of synchronized when more flexibility and control over locking mechanisms is required.

    • Use ReentrantLock when you need to implement advanced locking mechanisms like tryLock() or lockInterruptibly()

    • ReentrantLock supports fair locking, ensuring that threads acquire the lock in the order they requested it

    • Explicit unlocking in ReentrantLock can help prevent deadlocks and improve performa

  • Answered by AI
  • Q18. What is the difference between == and .equals() in Java? == checks for reference equality, meaning it compares memory addresses. equals() checks for value equality, which can be overridden in user-defined...
  • Ans. 

    In Java, == checks for reference equality while equals() checks for value equality. Misuse of == can lead to logical errors.

    • Override equals() when you want to compare the actual content of objects in user-defined classes.

    • Override hashCode() method alongside equals() to ensure consistent behavior in collections like HashMap.

    • Implement Comparable interface and override compareTo() method for natural ordering of objects.

  • Answered by AI
  • Q19. How does the Java garbage collector work? Garbage collection in Java automatically reclaims memory occupied by unused objects. The JVM has different types of GC algorithms, including Serial, Parallel, CMS...
  • Ans. 

    Garbage collection in Java automatically reclaims memory occupied by unused objects using different GC algorithms and memory regions.

    • Force garbage collection in Java can be done using System.gc() or Runtime.gc() methods.

    • It is generally not recommended to force garbage collection as it can disrupt the JVM's natural memory management process and cause performance issues.

    • Forcing garbage collection may not guarantee immedi...

  • Answered by AI
  • Q20. What are the main features of Java 8? Java 8 introduced lambda expressions, enabling functional-style programming. The Stream API allows efficient data processing with map, filter, and reduce operations. ...
  • Ans. 

    Lambda expressions in Java 8 improve readability and maintainability by enabling concise and functional-style programming.

    • Lambda expressions allow writing more compact code by reducing boilerplate code.

    • They enable passing behavior as arguments to methods, making code more modular and flexible.

    • Example: (a, b) -> a + b is a lambda expression that adds two numbers.

  • Answered by AI
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I was interviewed in Feb 2025.

Round 1 - Technical 

(2 Questions)

  • Q1. Write a program to find the least occuring character in a string
  • Q2. Write the code to group by salary for each employees

Interview Preparation Tips

Interview preparation tips for other job seekers - How can we increase the performance of database retrieval
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I was interviewed before Mar 2024.

Round 1 - Aptitude Test 

It's mixed of aptitude & pseudo code MCQ questions

Round 2 - Coding Test 

Programming of basic string & array

Round 3 - HR 

(1 Question)

  • Q1. Project & work location related questions

Newfold Digital Interview FAQs

How many rounds are there in Newfold Digital Operations Engineer interview?
Newfold Digital interview process usually has 5 rounds. The most common rounds in the Newfold Digital interview process are Technical, Resume Shortlist and Aptitude Test.
How to prepare for Newfold Digital Operations Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Newfold Digital. The most common topics and skills that interviewers at Newfold Digital expect are DNS, Python, Ansible, Configuration management and Customer Service.
What are the top questions asked in Newfold Digital Operations Engineer interview?

Some of the top questions asked at the Newfold Digital Operations Engineer interview -

  1. Computer Networks: Explain all layers in the OSI model and your understanding ...read more
  2. Key Focus: Fundamental concepts of Operating Systems: Process life cycle, Dead...read more
  3. Operating Systems: Paging, caching, deadlock Multithreading, multitasking Race...read more

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Newfold Digital Operations Engineer Interview Process

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Newfold Digital Operations Engineer Salary
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₹8 L/yr - ₹15 L/yr
138% more than the average Operations Engineer Salary in India
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