30+ BigSun Technologies Interview Questions and Answers

I will implement microservice architecture using containerization and API gateway pattern.

• Identify the bounded contexts and break down the monolith into smaller services

• Use containerization tools like Docker and Kubernetes for deployment and scaling

• Implement API gateway pattern to manage the communication between services

• Use service discovery tools like Consul or Eureka for service registration and discovery

• Implement fault tolerance and resilience patterns like circuit breake...read more

There are three types of topologies in SAN: point-to-point, arbitrated loop, and switched fabric.

• Point-to-point topology connects two devices directly.

• Arbitrated loop topology connects devices in a loop, where each device has a unique address.

• Switched fabric topology connects devices through a central switch, allowing multiple simultaneous connections.

• Examples: Fibre Channel (FC) and Internet Small Computer System Interface (iSCSI) are commonly used SAN topologies.

AWS offers a wide range of services, including compute, storage, databases, analytics, machine learning, and more.

• EC2 for compute

• S3 for storage

• RDS for databases

• Redshift for analytics

• SageMaker for machine learning

• Lambda for serverless computing

Application architecture refers to the design and organization of software applications.

• It includes the selection of technologies, frameworks, and patterns.

• It defines the components, modules, and layers of the application.

• It determines the communication and interaction between different parts of the application.

• It considers factors such as scalability, security, and maintainability.

• Examples include client-server architecture, microservices architecture, and event-driven archi...read more

Encountered challenges during past implementations and how they were resolved

• Lack of stakeholder buy-in led to resistance to change

• Integration issues with existing systems caused delays

• Insufficient training for end-users resulted in low adoption rates

• Scope creep led to project timeline and budget overruns

• Communication breakdowns between teams caused misunderstandings

Multi threading in Java can be implemented using two ways: extending the Thread class or implementing the Runnable interface.

• Extend the Thread class and override the run() method.

• Implement the Runnable interface and provide the implementation for the run() method.

• Create an instance of the Thread class and pass an instance of the class implementing Runnable as a parameter.

• Start the thread using the start() method.

• Example: 1. class MyThread extends Thread { public void run() { ...read more

Multipathing is a technique used in storage systems to provide redundancy and load balancing by using multiple paths between servers and storage devices.

• Multipathing improves storage system performance and availability.

• It allows for load balancing by distributing I/O traffic across multiple paths.

• Redundancy is achieved by having multiple paths in case one fails.

• Multipathing can be implemented at the hardware or software level.

• Examples of multipathing technologies include MPIO...read more

There are three types of backup: full, incremental, and differential.

• Full backup: backs up all data and takes the longest time and uses the most storage space

• Incremental backup: backs up only the changes made since the last backup and is faster and uses less storage space than a full backup

• Differential backup: backs up all changes made since the last full backup and is faster than a full backup but uses more storage space than an incremental backup

CDS views are used to define database views in ABAP, while AMDP is used to write database procedures in ABAP.

• CDS views are defined using ABAP Development Tools (ADT) in Eclipse IDE.

• AMDP allows writing database procedures directly in ABAP code.

• CDS views are used for defining virtual data models, while AMDP is used for complex calculations or data manipulations directly in the database.

• CDS views can be consumed in ABAP programs, while AMDP procedures are called from ABAP progra...read more

SAN stands for Storage Area Network. It is a high-speed network that connects servers and storage devices.

• SAN is a dedicated network that allows multiple servers to access shared storage resources.

• It provides centralized storage management and allows for scalability and flexibility.

• SANs use protocols like Fibre Channel or iSCSI to connect servers and storage devices.

• SANs can be used for various purposes like data backup, disaster recovery, and virtualization.

• Examples of SAN v...read more

Reduplication is the process of eliminating duplicate data in storage systems.

• Reduplication reduces storage space requirements and improves backup and recovery times.

• It works by identifying and removing identical data blocks and replacing them with pointers to a single copy.

• For example, if multiple users have the same file attachment in their emails, reduplication will store only one copy of the attachment and point to it from all the emails.

• Reduplication is commonly used in ...read more

The output is calculated using a mathematical formula based on the input number.

• The formula to calculate the output is: output = (input^2) + (input * 2)

• For example, for input 3: output = (3^2) + (3 * 2) = 9 + 6 = 15

• For example, for input 4: output = (4^2) + (4 * 2) = 16 + 8 = 24

NAS stands for Network Attached Storage. It is a file-level storage device that provides centralized data storage and access over a computer network.

• NAS is a storage device that connects to a network and allows multiple users to access and share files.

• It provides file-level access, meaning users can access individual files and folders stored on the NAS.

• NAS devices often have their own operating system and can offer additional features like data backup, remote access, and medi...read more

Replication is the process of creating and maintaining a copy of data or information in another location.

• Replication ensures data availability and disaster recovery.

• It can be synchronous or asynchronous.

• Examples include database replication, file replication, and virtual machine replication.

A program in Go that demonstrates the use of goroutines, channels, and a wait group.

• Create a goroutine that performs a task concurrently.

• Use channels to communicate between goroutines.

• Use a wait group to synchronize the completion of goroutines.

• Example: Calculate the sum of numbers using multiple goroutines and a channel.

Check the status of the purchase requisition in the system.

• Check if the purchase requisition has been approved by the appropriate authorities.

• Verify if there are any issues with the vendor or catalog causing the ordering process to be stuck.

• Review the workflow configuration to ensure there are no bottlenecks in the approval process.

• Check if there are any system errors or connectivity issues causing the PR to be stuck.

Finally, final, and finalize are related words with different meanings.

• Finally is an adverb used to indicate the end of something.

• Final is an adjective used to describe the last or ultimate stage of something.

• Finalize is a verb used to complete or make something final.

• Examples: Finally, I finished my project. The final exam is tomorrow. I need to finalize the contract.

Inheritance allows a class to inherit attributes and methods from another class, while polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Inheritance is a mechanism in OOP where a new class inherits properties and behaviors from an existing class.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Example of inheritance: class Car inherits from class Vehicle, inheriting attributes like ...read more

Thrashing is a phenomenon in computer systems where excessive paging or swapping occurs, leading to a decrease in performance.

• Occurs when the system spends more time swapping pages than executing instructions

• Caused by insufficient memory or poorly optimized programs

• Can be observed through high disk activity and low CPU utilization

• Example: A computer running multiple memory-intensive applications simultaneously

The seven layers of the OSI model are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Physical layer: deals with the physical transmission of data

• Data Link layer: responsible for error-free transfer of data between nodes

• Network layer: handles routing and forwarding of data packets

• Transport layer: ensures reliable delivery of data between end systems

• Session layer: establishes, manages, and terminates sessions between applications

• Presentation la...read more

Goroutine is a lightweight thread of execution that allows concurrent programming in Go.

• Goroutines are functions or methods that run concurrently with other goroutines.

• They are managed by the Go runtime and have their own stack space.

• Goroutines are more efficient than traditional threads and can be created easily using the 'go' keyword.

• They communicate with each other using channels, which are built-in data structures in Go.

• Goroutines enable efficient and scalable concurrent ...read more

time.Ticker is an alternative for time.Sleep() to create a repeating timer.

• Use time.Ticker to create a ticker that ticks at regular intervals.

• Use the ticker's C channel to receive the ticks.

• Stop the ticker when done using the Stop() method.

Continue to grow as a Senior Software Engineer by expanding technical skills, taking on leadership roles, and contributing to innovative projects.

• Continue to stay updated on latest technologies and trends in software development

• Take on mentorship roles to help junior engineers grow

• Lead projects and teams to showcase leadership abilities

• Contribute to open source projects to expand network and skills

• Attend conferences and workshops to network and learn from industry experts

Sort array of strings based on length of items

• Use the sort() method with a custom compare function

• Compare the length of strings in the array

• Return -1, 0, or 1 based on the comparison

S2P cycle involves sourcing, procurement, and payment processes in a business.

• Sourcing: Identifying suppliers, negotiating contracts, and selecting vendors.

• Procurement: Ordering goods or services, receiving them, and managing inventory.

• Payment: Processing invoices, making payments, and tracking expenses.

• Integration: Ensuring seamless flow of information between sourcing, procurement, and payment stages.

P2P cycle stands for Procure to Pay cycle, which involves the process of purchasing goods or services from a vendor and making payment for them.

• The cycle starts with the creation of a purchase order (PO) based on the requirements identified in the requisition.

• The vendor delivers the goods or services, and the receiving department confirms receipt in the system.

• An invoice is generated by the vendor and matched with the PO and receipt in the system for payment processing.

• Paymen...read more

ArrayList is faster for accessing elements, LinkedList is better for frequent insertions and deletions.

• ArrayList uses dynamic array to store elements, LinkedList uses doubly linked list.

• ArrayList is faster for accessing elements by index, LinkedList is better for frequent insertions and deletions.

• Example: ArrayList is suitable for scenarios where random access is required, LinkedList is suitable for scenarios where frequent insertions and deletions are needed.

Interface defines a contract for classes to implement, while abstract class can have some implementation.

• Interface can only have abstract methods and constants, while abstract class can have abstract methods, concrete methods, and member variables.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used for achieving multiple inheritance in Java, while abstract classes are used for code reusability and polymorphism.

• Example: In...read more