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20+ Honda Motorcycle & Scooter Interview Questions and Answers
Q1. Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed linked list: 4 -> 3 -> 2...read more
Reverse a singly linked list of integers and return the head of the reversed linked list.
Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.
Use three pointers to keep track of the current, previous, and next nodes while reversing the linked list.
Update the head of the reversed linked list as the last node encountered during the reversal process.
JVM allocates 5 types of memory areas: Heap, Stack, Method Area, PC Register, and Native Method Stack.
Heap is used for storing objects and is shared among all threads.
Stack is used for storing method calls and local variables, each thread has its own stack.
Method Area stores class structures, method data, and static variables.
PC Register stores the address of the currently executing instruction.
Native Method Stack is used for native method calls.
Spring Boot offers basic annotations like @SpringBootApplication, @RestController, @Autowired, @RequestMapping, @ComponentScan.
@SpringBootApplication - Used to mark the main class of a Spring Boot application.
@RestController - Used to define RESTful web services.
@Autowired - Used for automatic dependency injection.
@RequestMapping - Used to map web requests to specific handler methods.
@ComponentScan - Used to specify the base packages to scan for Spring components.
ArrayList is non-synchronized and Vector is synchronized in Java.
ArrayList is not synchronized, while Vector is synchronized.
ArrayList is faster than Vector as it is not synchronized.
Vector is thread-safe, while ArrayList is not.
Example: ArrayList<String> list = new ArrayList<>(); Vector<String> vector = new Vector<>();
The starter dependency of the Spring Boot module is spring-boot-starter-parent.
The starter dependency provides a set of default configurations and dependencies for Spring Boot applications.
It helps in reducing the amount of boilerplate code needed to set up a Spring Boot project.
The spring-boot-starter-parent is typically used as the parent project in a Spring Boot application's pom.xml file.
Different types of waits in Selenium WebDriver include Implicit Wait, Explicit Wait, and Fluent Wait.
Implicit Wait: Waits for a certain amount of time before throwing a NoSuchElementException.
Explicit Wait: Waits for a certain condition to occur before proceeding further in the code.
Fluent Wait: Waits for a condition to be true with a specified polling frequency and timeout.
HashSet is a collection of unique elements, while HashMap is a key-value pair collection.
HashSet does not allow duplicate elements, while HashMap allows duplicate values but not duplicate keys.
HashSet uses a hash table to store elements, while HashMap uses key-value pairs to store data.
Example: HashSet<String> set = new HashSet<>(); HashMap<String, Integer> map = new HashMap<>();
The @RestController annotation in Spring Boot is used to define a class as a RESTful controller.
It is a specialized version of the @Controller annotation that is used to create RESTful web services.
It eliminates the need for annotating each method with @ResponseBody as it combines @Controller and @ResponseBody annotations.
It is typically used to build RESTful web services that return JSON or XML data.
Example: @RestController public class UserController { @GetMapping("/users")...read more
The @SpringBootApplication annotation is used to mark the main class of a Spring Boot application.
Combines @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations
Enables the application to start with a main method
Automatically scans for Spring components in the package and sub-packages
ConcurrentHashMap is a thread-safe implementation of the Map interface in Java.
ConcurrentHashMap allows multiple threads to read and write to the map concurrently without causing any inconsistencies.
It achieves thread-safety by dividing the map into segments, each of which can be locked independently.
ConcurrentHashMap uses a technique called lock striping to minimize contention and improve performance.
It does not throw ConcurrentModificationException during iteration as it wo...read more
Q11. Create a regular expression accepting 10-digit numeric characters starting with 1, 2, or 3.
Regular expression for 10-digit numeric characters starting with 1, 2, or 3.
Use the pattern ^[1-3]\d{9}$ to match the criteria
The ^ symbol denotes the start of the string
The [1-3] specifies that the first digit must be 1, 2, or 3
\d{9} matches exactly 9 numeric digits
$ indicates the end of the string
Data encapsulation is the concept of bundling data with the methods that operate on that data within a class.
Data encapsulation restricts access to certain components of an object, protecting the data from external interference.
It allows for better control over the data by hiding the implementation details and only exposing necessary information through methods.
Encapsulation helps in achieving data abstraction, where the internal representation of an object is hidden from the...read more
Q13. what is a join in SQL? What are the types of joins?
A join in SQL is used to combine rows from two or more tables based on a related column between them.
Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
INNER JOIN returns rows when there is at least one match in both tables.
LEFT JOIN returns all rows from the left table and the matched rows from the right table.
RIGHT JOIN returns all rows from the right table and the matched rows from the left table.
FULL JOIN returns rows when there is a match in one of t...read more
No, static methods cannot be overridden in Java.
Static methods belong to the class itself, not to any specific instance of the class.
Subclasses can define static methods with the same signature as the parent class, but it is not considered overriding.
Example: Parent class has a static method 'display()', and subclass also has a static method 'display()'. These are two separate methods, not overriding each other.
findElement() returns the first matching element on the web page, while findElements() returns a list of all matching elements.
findElement() returns a single WebElement matching the locator provided.
findElements() returns a list of WebElements matching the locator provided.
If no elements are found, findElement() will throw a NoSuchElementException, while findElements() will return an empty list.
Q16. What do you mean by OOPS?
OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.
OOPS focuses on creating objects that contain data in the form of fields (attributes) and code in the form of procedures (methods).
Encapsulation, inheritance, and polymorphism are key principles of OOPS.
Encapsulation refers to the bundling of data and methods that operate on the data into a single unit (object).
Inheritance allows a class to inherit properties and b...read more
Dependency injection is a design pattern where 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
Q18. what are the basic SQL skills?
Basic SQL skills include querying databases, manipulating data, and understanding database structures.
Writing basic SQL queries to retrieve data from databases
Understanding and using SQL functions and operators
Creating and modifying database tables and relationships
Using SQL to filter, sort, and group data
Understanding basic SQL syntax and commands
Q19. Sql plsql data strucntire and differences
SQL is a language used to manage and query databases, PL/SQL is an extension that adds procedural programming capabilities.
SQL is used for querying and manipulating data in databases.
PL/SQL is a procedural language extension for SQL, allowing for more complex logic and programming capabilities.
Data structures in SQL refer to the way data is organized and stored in tables.
PL/SQL allows for the creation of custom data structures using variables, arrays, and records.
Differences ...read more
Q20. Convert Hours into Seconds.
To convert hours into seconds, multiply the number of hours by 3600.
Multiply the number of hours by 3600 to get the equivalent seconds.
For example, 2 hours = 2 * 3600 = 7200 seconds.
Q21. What language you haveused
I have used a variety of programming languages including Java, Python, C++, and JavaScript.
Java
Python
C++
JavaScript
Q22. What is sql and plsql?
SQL is a language used for managing and querying databases, while PL/SQL is an extension of SQL used for procedural programming.
SQL stands for Structured Query Language and is used for managing and querying relational databases.
PL/SQL stands for Procedural Language/SQL and is an extension of SQL that adds procedural programming capabilities.
SQL is used to retrieve and manipulate data in databases using queries like SELECT, INSERT, UPDATE, DELETE.
PL/SQL allows for the creation...read more
Q23. difference beyween fporms and reports
Forms are used to input data while reports are used to display data.
Forms are used to collect and input data into a system.
Reports are used to display and present data in a structured format.
Forms are interactive and allow users to input data, while reports are static and provide information based on the data entered.
Examples: A registration form on a website vs. a sales report generated from a database.
Q24. Explain about Spring MVC architecture
Spring MVC is a framework for building web applications in Java, following the Model-View-Controller design pattern.
Spring MVC follows the Model-View-Controller design pattern, where the model represents the data, the view represents the UI, and the controller handles the user input.
It provides components like DispatcherServlet, Controller, Model, and ViewResolver to handle requests and responses.
It supports the use of annotations like @Controller, @RequestMapping, and @Model...read more
Q25. Explain about Java Collections framework
Java Collections framework is a set of classes and interfaces that provide various data structures and algorithms to store and manipulate collections of objects.
Provides interfaces (List, Set, Map) and classes (ArrayList, HashSet, HashMap) for storing and manipulating collections of objects
Includes utility classes like Collections for sorting, searching, and other operations on collections
Supports generics to ensure type safety and reduce the need for explicit type casting
Off...read more
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