10+ National Board of Examinations Interview Questions and Answers

Concatenate array of integers to form a single number

• Convert each integer to string

• Concatenate the strings to form a single number

• Handle edge cases like leading zeros

• Example: [3, 30, 34] -> '33034'

Iterate through array to find greatest number

• Iterate through each element in the array

• Compare each element with a variable storing the current greatest number

• Update the variable if a greater number is found

Hosting in JavaScript refers to the process of deploying a website or web application on a server to make it accessible on the internet.

• Hosting allows users to access your website by typing in the domain name in a web browser.

• Common hosting services include shared hosting, VPS hosting, and cloud hosting.

• Examples of popular hosting providers include Bluehost, HostGator, and AWS.

• Hosting also involves managing server resources, security, and performance optimization.

Kafka provides high throughput, fault tolerance, and scalability for real-time data streaming.

• High throughput: Kafka can handle a large number of messages per second.

• Fault tolerance: Kafka replicates data across multiple brokers to ensure data availability.

• Scalability: Kafka can easily scale horizontally by adding more brokers to the cluster.

• Real-time data streaming: Kafka allows for real-time processing of data streams.

• Example: Kafka is commonly used in big data applications...read more

The public static void main method is the entry point for a Java program.

• public: Access modifier indicating that the method is accessible from outside the class

• static: Method belongs to the class itself rather than an instance of the class

• void: Method does not return any value

• main: Name of the method that serves as the entry point for Java programs

• String[] args: Array of strings that can be passed as arguments to the main method

Spring Boot is a Java-based framework used for creating standalone, production-grade Spring-based Applications.

• Spring Boot simplifies the process of creating Spring applications by providing a set of default configurations.

• It allows for easy setup of Spring projects with minimal configuration.

• Spring Boot includes embedded servers like Tomcat, Jetty, or Undertow, making it easy to deploy applications.

• It promotes convention over configuration, reducing the need for boilerplate ...read more

A bit is the smallest unit of data in computing, while a byte is made up of 8 bits.

• A bit can have a value of 0 or 1, representing off or on respectively.

• A byte is made up of 8 bits, allowing for a larger range of values (0-255).

• Bytes are commonly used to represent characters in text, with each character typically taking up one byte.

• Bits are often used in Boolean logic operations and for representing binary numbers.

Stringbuilder is faster but not thread-safe, while StringBuffer is slower but thread-safe.

• Stringbuilder is faster due to lack of synchronization, suitable for single-threaded environments.

• StringBuffer is slower due to synchronization, suitable for multi-threaded environments.

• Use StringBuilder when performance is a priority, use StringBuffer when thread safety is a concern.

Rollback in Hibernate is used to undo the changes made to the database during a transaction.

• Rollback is used to revert any changes made to the database within a transaction if an error occurs.

• It is typically called in catch block of try-catch-finally block to handle exceptions.

• Example: session.beginTransaction(); try { // database operations } catch (Exception e) { session.getTransaction().rollback(); }