10+ Rational Technology Interview Questions and Answers

S3 has 6 different types, including S3-IA which is a cost-effective storage option for infrequently accessed data.

• S3 Standard: for frequently accessed data

• S3 Intelligent-Tiering: automatically moves data between two access tiers based on changing access patterns

• S3 Standard-Infrequent Access (S3 Standard-IA): for infrequently accessed data

• S3 One Zone-Infrequent Access (S3 One Zone-IA): for infrequently accessed data that can be recreated if lost

• S3 Glacier: for long-term archiv...read more

There are 10 modules in the project that communicate with each other using REST APIs and message queues.

• There are 10 modules in the project

• Communication is done using REST APIs and message queues

• Each module has defined endpoints for communication

Dynamic libraries are loaded at runtime, enhancing program flexibility and modularity.

• Dynamic libraries are compiled separately from the main program and linked at runtime.

• They allow for code reuse and modular design, reducing duplication and improving maintainability.

• Dynamic libraries can be loaded using functions like dlopen() in C or LoadLibrary() in Windows.

• Examples include loading a graphics library for rendering or a networking library for communication.

Load average is the average number of processes waiting to run on a CPU over a period of time.

• Load average is a measure of system utilization.

• It is calculated as the average number of processes that are either in a runnable or uninterruptable state.

• Load average is displayed as three numbers representing the average load over the last 1, 5, and 15 minutes.

• A load average of 1.0 means that the CPU is fully utilized.

• A load average of 2.0 means that there are twice as many process...read more

A program to restart VMs sequentially

• Create a list of VMs to be restarted

• Loop through the list and restart each VM one by one

• Wait for each VM to complete the restart process before moving to the next one

3 tier architecture consists of presentation, application, and database layers.

• Presentation layer: User interface, web server, load balancer

• Application layer: Business logic, application server, API gateway

• Database layer: Data storage, database server, backup and recovery

• Each layer is independent and can be scaled separately

• Example: Web application with AngularJS on presentation layer, Java on application layer, and MySQL on database layer

A linked list is a linear data structure where each element is a separate object with a pointer to the next element.

• Linked list is a collection of nodes where each node contains data and a reference to the next node.

• It allows dynamic memory allocation and efficient insertion and deletion operations.

• Examples include singly linked list, doubly linked list, and circular linked list.

DR processes refer to the procedures and strategies put in place to ensure business continuity in the event of a disaster.

• DR processes involve identifying critical systems and data that need to be protected

• Creating backup and recovery plans for these critical systems and data

• Testing the backup and recovery plans to ensure they work effectively

• Implementing measures to ensure the availability and accessibility of critical systems and data during a disaster

• Regularly reviewing an...read more

Yes, Object-Oriented Programming (OOP) is a programming paradigm based on the concept of objects.

• OOP focuses on creating objects that contain both data and functions to manipulate the data.

• Key principles of OOP include encapsulation, inheritance, and polymorphism.

• Examples of OOP languages include Java, C++, and Python.

The latest OS is Windows 11, released by Microsoft in October 2021.

• Windows 11 is the latest operating system released by Microsoft

• It was officially released in October 2021

• Windows 11 comes with new features such as a redesigned Start menu and improved gaming capabilities

Constructors are special methods used to initialize objects in a class.

• Constructors have the same name as the class and do not have a return type.

• They are called automatically when an object is created.

• Constructors can be used to set initial values for object attributes.

• Example: public class Car { public Car() { // constructor code here } }