Fujitsu Interview Questions and Answers

The Linux boot process involves several stages, including BIOS, bootloader, kernel initialization, and user space initialization.

• BIOS (Basic Input/Output System) performs hardware initialization and loads bootloader

• Bootloader (GRUB, LILO) loads the Linux kernel into memory

• Kernel initializes devices, mounts the root filesystem, and starts user space processes

• User space initialization involves starting system services an...read more

Yes, I have experience handling P1/P2 incidents in my previous roles.

• Yes, I have handled multiple P1 incidents where immediate action was required to resolve critical issues impacting production systems.

• I have also managed P2 incidents by prioritizing and troubleshooting to minimize impact on operations.

• Examples include resolving server outages, database failures, and network connectivity issues under time pressure.

Dependency Injection is a design pattern in which components are given their dependencies rather than creating them internally.

• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection

In Java, exceptions can be handled using try-catch blocks to catch and handle specific exceptions.

• Use try-catch blocks to catch exceptions and handle them gracefully

• Use multiple catch blocks to handle different types of exceptions

• Use finally block to execute code regardless of whether an exception is thrown or not

• Throw custom exceptions using throw keyword

map transforms each element in a stream, while flatMap transforms each element into multiple elements

• map applies a function to each element in a stream and returns a new stream of the results

• flatMap applies a function that returns a stream for each element in the original stream, then flattens the streams into a single stream

• Example: map - stream.map(x -> x * x), flatMap - stream.flatMap(str -> Arrays.stream(str.split(...read more

ConcurrentModificationException occurs when a collection is modified while iterating over it.

• Use Iterator to iterate over the collection instead of foreach loop.

• If modification is necessary, use Iterator's remove() method instead of collection's remove() method.

• Consider using synchronized collections or ConcurrentHashMap to avoid ConcurrentModificationException.

Dynamic professional with a background in project management and a passion for driving efficiency and innovation in teams.

• Over 5 years of experience in project management, successfully leading cross-functional teams to deliver projects on time and within budget.

• Skilled in Agile methodologies, having implemented Scrum practices that improved team productivity by 30%.

• Strong communication skills, demonstrated through regu...read more

Primary keys uniquely identify records in a table, while unique keys ensure all values in a column are distinct.

• Primary Key: A column or set of columns that uniquely identifies each row in a table.

• Example: In a 'Users' table, 'UserID' can be a primary key.

• Unique Key: A constraint that ensures all values in a column are unique, but allows one NULL value.

• Example: In a 'Users' table, 'Email' can be a unique key, allowing ...read more

Java consists of several key components including the Java Development Kit, Java Runtime Environment, and Java Virtual Machine.

• Java Development Kit (JDK): A software development kit for developing Java applications. Example: JDK 17.

• Java Runtime Environment (JRE): Provides libraries and components necessary to run Java applications. Example: JRE 8.

• Java Virtual Machine (JVM): An abstract machine that enables Java bytecod...read more