Fulcrum Digital Senior Engineer and Project Lead Interview Questions and Answers

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.

• A prime number has exactly two distinct positive divisors: 1 and itself.

• Examples of prime numbers include 2, 3, 5, 7, 11, and 13.

• The number 1 is not prime, and 2 is the only even prime number.

• To check if a number n is prime, test divisibility from 2 to sqrt(n).

• For example, to check if 29 is prime, test div...read more

Find the two maximum numbers in an array of strings.

• Convert the array of strings to an array of integers.

• Sort the array in descending order.

• Return the first two elements of the sorted array.

Java is platform independent due to its bytecode and the Java Virtual Machine (JVM) that allows execution on any OS.

• Java code is compiled into bytecode, which is platform-independent.

• The Java Virtual Machine (JVM) interprets bytecode on any operating system.

• This allows Java applications to run on Windows, macOS, Linux, etc., without modification.

• Example: A Java program compiled on Windows can run on Linux without recom...read more

Primary key uniquely identifies a record in a table, while foreign key establishes a link between two tables.

• Primary key is used to enforce data integrity and ensure uniqueness of records.

• Foreign key is used to establish relationships between tables and enforce referential integrity.

• A table can have only one primary key, while it can have multiple foreign keys.

• Primary key can be used as a foreign key in another table.

• E...read more

REST API is lightweight and flexible, while SOAP is more structured and secure.

• REST uses HTTP protocol and supports multiple data formats like JSON, XML, etc.

• SOAP uses XML protocol and supports only XML data format.

• REST is faster and consumes less bandwidth than SOAP.

• SOAP has built-in security features like WS-Security and WS-Trust.

• REST is easier to implement and maintain than SOAP.

• SOAP is better suited for enterprise-...read more

To create a repository in GIT using command prompt, use the 'git init' command.

• Open the command prompt and navigate to the directory where you want to create the repository

• Type 'git init' command to initialize the repository

• Add files to the repository using 'git add' command

• Commit the changes using 'git commit' command

• Create a remote repository on GitHub or any other hosting service

• Add the remote repository using 'git ...read more

Primary key uniquely identifies a record in a table, while foreign key refers to a field in another table.

• Primary key is a column or set of columns that uniquely identifies each row in a table

• Foreign key is a column or set of columns in one table that refers to the primary key in another table

• Primary key cannot have null values, while foreign key can have null values

• Primary key can be used to create relationships betwe...read more

API stands for Application Programming Interface. It is a set of protocols, routines, and tools for building software applications.

• API allows different software applications to communicate with each other

• It defines how software components should interact

• API provides a layer of abstraction between the application and the underlying system

• Examples of APIs include Google Maps API, Twitter API, and Facebook API

Count the characters in a given string.

• Iterate through the string and count each character

• Use a hash table to store the count of each character

• Handle edge cases such as empty string or null input

Load balancing is the process of distributing network traffic across multiple servers to improve performance and availability.

• Load balancing helps prevent server overload and downtime

• It can be achieved through hardware or software solutions

• Examples include round-robin, least connections, and IP hash algorithms

REST is an architectural style while SOAP is a protocol. REST is lightweight and uses HTTP while SOAP is XML-based and uses other protocols.

• REST is stateless while SOAP maintains state

• REST uses HTTP verbs (GET, POST, PUT, DELETE) while SOAP uses XML messaging

• REST is faster and easier to use while SOAP is more secure and reliable

• REST is used for web services while SOAP is used for enterprise-level web services

• Examples o...read more