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100+ Vector Wings Technologies Interview Questions and Answers

Updated 31 Jan 2025
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Q101. How do you implement security measures for your microservices?

Ans.

Implementing security measures for microservices involves using authentication, authorization, encryption, and monitoring.

  • Implement authentication mechanisms such as OAuth, JWT, or API keys to verify the identity of clients accessing the microservices.

  • Enforce authorization rules to control access to different parts of the microservices based on roles and permissions.

  • Use encryption techniques like TLS/SSL to secure communication between microservices and external clients.

  • Imple...read more

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Q102. Given 2 Nodes 1->9 ->0 1->0 Add both of them so resulting node would be 2->0->0 190 +10 = 200 Java 8 questions

Ans.

Add two linked lists representing numbers and return the resulting linked list.

  • Traverse both linked lists and add the corresponding digits, keeping track of carry.

  • Create a new node for each digit and update the carry for the next iteration.

  • If one list is longer than the other, add the remaining digits to the result.

  • Handle the case where the carry is not zero after all digits have been added.

  • Time complexity: O(max(m,n)), where m and n are the lengths of the input lists.

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Q103. How do you handle an irate customer?

Ans.

I remain calm, listen actively, empathize with their situation, apologize for any inconvenience, and work towards finding a solution.

  • Remain calm and composed

  • Listen actively to understand their concerns

  • Empathize with their situation

  • Apologize for any inconvenience caused

  • Work towards finding a solution to address their issue

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Q104. What are props in React?
Ans.

Props are short for properties and are used to pass data from parent to child components in React.

  • Props are read-only and cannot be modified by the child component.

  • Props are passed down from parent to child components using attributes.

  • Props can be any type of data, including strings, numbers, arrays, objects, or functions.

  • Example: <ChildComponent name='John' age={25} />

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Q105. What is your approach to building basic logic skills?

Ans.

My approach to building basic logic skills involves practicing problem-solving exercises, breaking down complex problems into smaller parts, and seeking feedback to improve.

  • Practice problem-solving exercises regularly to strengthen logical thinking abilities.

  • Break down complex problems into smaller, more manageable parts to better understand the problem and find solutions.

  • Seek feedback from peers or mentors to identify areas for improvement and refine logic skills.

  • Utilize res...read more

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Q106. Programming - find the frequency of given character in a sorted string.

Ans.

Use binary search to find the first and last occurrence of the character, then calculate the frequency.

  • Use binary search to find the first occurrence of the character in the string.

  • Use binary search to find the last occurrence of the character in the string.

  • Calculate the frequency by subtracting the indices of the last and first occurrences and adding 1.

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Q107. Sync Api vs Async Api, Sync Microservice and Async microservice example

Ans.

Sync API waits for a response before continuing, while Async API allows the program to continue executing without waiting for a response.

  • Sync API is blocking and waits for a response before proceeding

  • Async API is non-blocking and allows the program to continue executing while waiting for a response

  • Sync microservice handles requests sequentially, while Async microservice can handle multiple requests concurrently

  • Example of Sync API: REST API that waits for a response before ret...read more

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Q108. Method overriding based code question -&gt; guess the output

Ans.

Method overriding in Java with code example

  • Output will be 'Child class method' as the method in Child class overrides the method in Parent class

  • Method overriding is a feature that allows a subclass to provide a specific implementation of a method that is already provided by its superclass

  • The method in the subclass should have the same name, return type, and parameters as the method in the superclass

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Q109. OOPs concepts, and their pillars. Design a Vehicle class, by understanding the requirements

Ans.

OOPs concepts and pillars. Design a Vehicle class based on requirements.

  • OOPs concepts: Abstraction, Encapsulation, Inheritance, Polymorphism

  • Vehicle class requirements: attributes like make, model, year, methods like start, stop, accelerate

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Q110. How to find an IP address?

Ans.

An IP address can be found by checking network settings, using command prompt, or using online tools.

  • Check network settings on your device

  • Use command prompt and type 'ipconfig' for Windows or 'ifconfig' for Mac/Linux

  • Use online tools like 'WhatIsMyIP.com' or 'IP-Address.com'

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Q111. 1. diff between throw ,throws 2. jit compiler 3. diff between compiler and compellers 4. acid properties 5. normalization

Ans.

Answers to various technical questions related to programming and database concepts.

  • throw is used to throw an exception in Java, while throws is used in method signature to declare the exceptions that can be thrown by the method

  • JIT compiler stands for Just-In-Time compiler, which compiles Java bytecode into native machine code at runtime for improved performance

  • Compiler is a software program that translates high-level programming languages into machine code, while compellers ...read more

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Q112. How does Redux work?
Ans.

Redux is a predictable state container for JavaScript apps.

  • Redux stores the entire state of an application in a single immutable object.

  • State changes are made by dispatching actions, which are plain JavaScript objects.

  • Reducers specify how the state changes in response to actions.

  • Components can subscribe to the Redux store to access the state and re-render when it changes.

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Q113. handling distributed transactions in microservices using the Saga pattern?

Ans.

Saga pattern is used to manage distributed transactions in microservices by breaking them into smaller, independent transactions.

  • Saga pattern involves breaking down a long transaction into a series of smaller, independent transactions.

  • Each step in the saga is a separate transaction that can be rolled back if needed.

  • Compensating transactions are used to undo the effects of a previously completed step in case of failure.

  • Sagas can be implemented using choreography or orchestrati...read more

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Q114. Internal working of hashmap, multi Thread,DSA and Coding.

Ans.

Question on internal working of hashmap, multi-threading, DSA, and coding.

  • HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

  • Multi-threading is the ability of a CPU to execute multiple threads concurrently.

  • DSA stands for Data Structures and Algorithms, which are fundamental concepts in computer science.

  • Coding involves writing instructions in a programming language to create software applications.

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Q115. Write a REST api to fetch user details using userId.

Ans.

Create a REST api to fetch user details using userId

  • Create a GET endpoint /users/{userId} to fetch user details

  • Use userId as a parameter in the endpoint

  • Return user details in JSON format

  • Handle errors for invalid userId

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Q116. Write a global exception handler class to handle UserNotFound exception.

Ans.

Create a global exception handler class for UserNotFound exception.

  • Create a class that extends ExceptionHandler class

  • Override the handleException method to handle UserNotFound exception

  • Implement the logic to handle the exception, such as logging or returning a custom error message

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Q117. What are different sorting algorithms?

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Q118. What is redux and how it works?

Ans.

Redux is a predictable state container for JavaScript apps.

  • Redux is a state management library for JavaScript applications.

  • It provides a centralized store to manage the state of an application.

  • Redux follows a unidirectional data flow pattern.

  • Actions are dispatched to update the state in the store.

  • Reducers are pure functions that update the state based on the dispatched actions.

  • Selectors are used to retrieve data from the store.

  • Middleware can be used to intercept and modify ac...read more

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Q119. Memory Management in Python

Ans.

Memory management in Python involves automatic memory allocation and deallocation through garbage collection.

  • Python uses automatic memory management through garbage collection to allocate and deallocate memory.

  • Memory is managed using reference counting and a cycle-detecting garbage collector.

  • Python's memory management is efficient for most use cases, but can lead to memory leaks if circular references are not handled properly.

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Q120. Garbage Collection in Python

Ans.

Garbage collection in Python is an automatic memory management process that helps in reclaiming memory occupied by objects that are no longer in use.

  • Python uses a built-in garbage collector to manage memory automatically.

  • The garbage collector in Python uses reference counting and a cycle-detecting algorithm to reclaim memory.

  • Explicitly calling the 'gc.collect()' function can trigger garbage collection in Python.

  • Garbage collection helps in preventing memory leaks and optimizin...read more

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Q121. Program to find whether a number is prime or not

Ans.

Program to check if a number is prime or not

  • A prime number is only divisible by 1 and itself

  • Loop through numbers from 2 to n-1 and check if n is divisible by any of them

  • If n is divisible by any number, it is not prime

  • If n is not divisible by any number, it is prime

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Q122. What is Redux?
Ans.

Redux is a predictable state container for JavaScript apps.

  • Redux is a state management library for JavaScript applications.

  • It helps in managing the state of an application in a predictable way.

  • Redux stores the entire state of the application in a single immutable object.

  • Actions are dispatched to update the state, and reducers specify how the state changes in response to actions.

  • Redux is commonly used with React to manage the state of complex applications.

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Q123. Different types of No SQL DBs

Ans.

NoSQL databases are non-relational databases that store and retrieve data in a non-tabular format.

  • Document-oriented databases (MongoDB, Couchbase)

  • Key-value stores (Redis, Riak)

  • Column-family stores (Cassandra, HBase)

  • Graph databases (Neo4j, OrientDB)

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Q124. What are ur weakness

Ans.

One of my weaknesses is procrastination.

  • I tend to put off tasks until the last minute.

  • To overcome this, I have started using time management techniques such as the Pomodoro technique.

  • I also try to break down tasks into smaller, more manageable chunks.

  • I have found that setting deadlines for myself and holding myself accountable helps me stay on track.

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Q125. what is hashing and does it have key?

Ans.

Hashing is a process of converting data into a fixed-size output. It has a key that is used to access the data.

  • Hashing is used to store and retrieve data quickly.

  • It uses a hash function to generate a unique key for each input data.

  • The key is used to access the data in constant time.

  • Hashing is used in password storage, data indexing, and cryptography.

  • Examples of hash functions include MD5, SHA-1, and SHA-256.

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Q126. Class vs functional components?

Ans.

Functional components are simpler and easier to test, while class components have more features and better performance.

  • Functional components are stateless and use hooks for state management.

  • Class components have lifecycle methods and can hold state.

  • Functional components are easier to read and write.

  • Class components have better performance in certain scenarios.

  • Functional components are recommended for simple UI components.

  • Class components are recommended for complex UI compone...read more

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Q127. Print factorial of n through recursion Sum of all n numbers

Ans.

Factorial of n and sum of n numbers using recursion

  • Create a recursive function to calculate factorial of n

  • Use a recursive function to calculate the sum of all n numbers

  • Handle base cases for both factorial and sum calculations

  • Example: Factorial of 5 = 5 * 4 * 3 * 2 * 1 = 120, Sum of first 5 numbers = 1 + 2 + 3 + 4 + 5 = 15

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Q128. Find the second largest element from the array.

Ans.

Find the second largest element from the array.

  • Sort the array in descending order and return the second element.

  • Iterate through the array and keep track of the two largest elements.

  • Use a priority queue to find the second largest element.

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Q129. what is a stack and implement it

Ans.

A stack is a linear data structure that follows the Last In First Out (LIFO) principle.

  • Elements are added to the top of the stack and removed from the top as well.

  • Common operations include push (add element to top) and pop (remove element from top).

  • Stacks can be implemented using arrays or linked lists.

  • Example: undo/redo functionality in a text editor.

  • Example: function call stack in programming languages.

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Q130. how to handle a Frustrated user

Ans.

Acknowledge their frustration, actively listen, empathize, apologize, offer a solution or escalate if necessary.

  • Remain calm and professional

  • Use active listening skills

  • Empathize with the user's frustration

  • Apologize for any inconvenience caused

  • Offer a solution or escalate to a higher level of support if necessary

  • Provide clear and concise communication throughout the interaction

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Q131. Find all the permutations of the string.

Ans.

Permutations of a string

  • Use recursion to swap characters and generate permutations

  • Iterate through the string and swap each character with the first character

  • Repeat the above step for each character in the string

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Q132. fetch all the duplicate values from an array

Ans.

To fetch all duplicate values from an array of strings

  • Iterate through the array and store each element in a HashSet

  • If an element is already in the HashSet, it is a duplicate value

  • Add the duplicate values to a separate list and return it

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Q133. Different types of scaling

Ans.

Scaling refers to the process of increasing or decreasing the capacity of a system to handle more or less load.

  • Vertical Scaling: Adding more resources to a single node

  • Horizontal Scaling: Adding more nodes to a system

  • Load Balancing: Distributing the load across multiple nodes

  • Database Sharding: Splitting a database into smaller parts to distribute the load

  • Caching: Storing frequently accessed data in memory for faster access

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Q134. SOLID Principle and best coding practices

Ans.

SOLID principles and best coding practices are essential for creating maintainable and scalable software.

  • S - Single Responsibility Principle: Each class should have only one responsibility.

  • O - Open/Closed Principle: Classes should be open for extension but closed for modification.

  • L - Liskov Substitution Principle: Subtypes should be substitutable for their base types.

  • I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do not use.

  • D - ...read more

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Q135. Advance of angular

Ans.

Angular is a popular front-end framework for building web applications.

  • Angular is developed and maintained by Google.

  • It uses TypeScript for building scalable and maintainable applications.

  • Angular has a powerful CLI for generating components, services, and more.

  • It has a large and active community with many third-party libraries and plugins available.

  • Angular has a modular architecture that allows for easy code reuse and testing.

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Q136. Sort the array and return second last element

Ans.

Sort array and return second last element

  • Use built-in sort function

  • Access second last element using array index -2

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Q137. Diff between JDK,JVM,JRE. Equals and HashCode

Ans.

JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine. Equals compares object values, HashCode returns a unique integer for an object.

  • JDK includes JRE and development tools, while JRE includes JVM and necessary libraries

  • JVM is responsible for executing Java bytecode

  • Equals method compares the values of two objects, while == compares their references

  • HashCode method returns a unique integer for an object, used for hashing and storing objects in col...read more

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Q138. What is a cursor and write a query

Ans.

A cursor is a database object used to retrieve data from a result set one row at a time.

  • A cursor is used to iterate through a result set.

  • It can be used to update or delete rows in a table.

  • Example query: DECLARE cursor_name CURSOR FOR SELECT column1, column2 FROM table_name;

  • Example usage: OPEN cursor_name; FETCH NEXT FROM cursor_name INTO @variable1, @variable2;

  • Example usage: CLOSE cursor_name; DEALLOCATE cursor_name;

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Q139. coding to find the common characters comparing 3 strings

Ans.

Finding common characters in 3 strings using coding

  • Create a function that takes in 3 strings as input

  • Iterate through each character of the first string and check if it exists in the other 2 strings

  • Store the common characters in an array and return it

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Q140. Basic System design of inter service communication in transactional systems.

Ans.

Inter service communication in transactional systems involves designing a reliable and efficient way for services to communicate and exchange data.

  • Use asynchronous messaging systems like RabbitMQ or Kafka to decouple services and ensure reliable message delivery.

  • Implement RESTful APIs for synchronous communication between services, using HTTP methods like GET, POST, PUT, DELETE.

  • Consider using gRPC for high-performance, low-latency communication between services, especially in...read more

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Q141. Loading and processing a file with huge data volume

Ans.

Use pandas library for efficient loading and processing of large files in Python.

  • Use pandas read_csv() function with chunksize parameter to load large files in chunks.

  • Optimize memory usage by specifying data types for columns in read_csv() function.

  • Use pandas DataFrame methods like groupby(), merge(), and apply() for efficient data processing.

  • Consider using Dask library for parallel processing of large datasets.

  • Use generators to process data in chunks and avoid loading entire...read more

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Q142. In given array find the sum a*a+b*b=c*c

Ans.

Use a nested loop to iterate through the array and check for the sum of squares of two elements equal to the square of a third element.

  • Iterate through the array using a nested loop to compare all possible combinations of elements.

  • Calculate the sum of squares of two elements and check if it equals the square of a third element.

  • Return the elements if a match is found, otherwise continue iterating.

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Q143. Designing parking system

Ans.

Designing a parking system for efficient management of parking spaces.

  • Utilize sensors to detect available parking spaces

  • Implement a reservation system for users to book parking spots in advance

  • Incorporate a payment system for users to pay for parking

  • Include a monitoring system to track occupancy levels and manage traffic flow

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Q144. Left View of a Binary Tree.

Ans.

Left view of a binary tree

  • The left view of a binary tree shows the leftmost node at each level

  • We can traverse the tree in a pre-order fashion and keep track of the current level

  • If the current level is greater than the maximum level seen so far, add the node to the result

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Q145. Tell me about spring boot

Ans.

Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.

  • Spring Boot eliminates the need for manual configuration by providing defaults for most settings.

  • It allows developers to create stand-alone, production-grade Spring-based Applications.

  • Spring Boot includes an embedded Tomcat, Jetty, or Undertow server, making it easy to deploy web applications.

  • It provides a range of features such as auto-configuration,...read more

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Q146. Difference between use ref and create ref

Ans.

useRef is a hook used to create a mutable ref object, while createRef is a method used to create a ref object.

  • useRef is a hook provided by React, while createRef is a method provided by the React library.

  • useRef can be used in functional components to create a mutable ref object that persists across renders.

  • createRef is used in class components to create a ref object that can be attached to a DOM element.

  • useRef can also be used to store any mutable value, not just DOM elements...read more

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Q147. What is Devops and how do you use

Ans.

DevOps is a software development methodology that combines software development (Dev) with IT operations (Ops) to improve collaboration and efficiency.

  • DevOps focuses on automating and streamlining the software development process.

  • It involves continuous integration, continuous delivery, and continuous deployment.

  • DevOps aims to shorten the system development life cycle and provide continuous delivery of high-quality software.

  • Tools commonly used in DevOps include Jenkins, Docker...read more

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Q148. Optional Class, Stream.map() vs Stream.flatMap()

Ans.

Stream.map() transforms each element in a stream, while Stream.flatMap() transforms each element into a stream of values.

  • map() applies a function to each element in a stream and returns a new stream with the transformed elements.

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

  • Example: map() - Stream.of(1, 2, 3).map(x -> x * 2) returns Stream.of(2, 4, 6).

  • Example: flatMap() - St...read more

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Q149. Etl pipeline procedure examples

Ans.

ETL pipeline procedures involve extracting data from various sources, transforming it, and loading it into a target database.

  • Extract data from source systems using tools like Informatica, Talend, or Apache Nifi

  • Transform data by cleaning, filtering, aggregating, and enriching it using SQL, Python, or Spark

  • Load the transformed data into a target database such as MySQL, PostgreSQL, or Redshift

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Q150. Print all duplicate elements in an Array

Ans.

Print duplicate elements in an Array of strings

  • Iterate through the array and use a HashMap to store frequency of each element

  • Print elements with frequency greater than 1 as duplicates

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Q151. Advantages of IOC in spring and DI

Ans.

IOC in Spring and DI offer flexibility, maintainability, and testability in software development.

  • Promotes loose coupling between components

  • Allows for easier unit testing and mocking

  • Facilitates easier configuration and management of dependencies

  • Enables better separation of concerns

  • Promotes reusability of components

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Q152. What you did in Marketo tool?

Ans.

I utilized Marketo tool for creating and executing marketing campaigns, managing leads, and analyzing campaign performance.

  • Created and automated email campaigns to nurture leads

  • Built landing pages and forms to capture lead information

  • Segmented leads based on behavior and demographics for targeted campaigns

  • Analyzed campaign performance and adjusted strategies accordingly

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Q153. What is volatile how to use gdb what is singleton

Ans.

Questions on volatile, gdb usage, and singleton pattern.

  • Volatile is a keyword in C that tells the compiler not to optimize the variable.

  • GDB is a debugger tool used to analyze and debug code during runtime.

  • Singleton is a design pattern that restricts the instantiation of a class to one object.

  • To use GDB, compile the code with the -g flag, run the executable with gdb, set breakpoints, and use commands like 'next' and 'print'.

  • An example of using the singleton pattern is creating...read more

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Q154. Custom ordering in sql

Ans.

Custom ordering in SQL allows you to specify the order in which results are returned.

  • Use ORDER BY clause in SQL to specify custom ordering

  • You can order by multiple columns and specify ASC (ascending) or DESC (descending) order

  • Example: SELECT * FROM table_name ORDER BY column_name ASC;

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Q155. Clustering depth in snowflake

Ans.

Clustering depth in Snowflake refers to the number of levels in the clustering key hierarchy.

  • Clustering depth determines the granularity of data organization within Snowflake tables.

  • A higher clustering depth means more levels in the clustering key hierarchy, allowing for more specific data organization.

  • Clustering depth can impact query performance and storage efficiency in Snowflake.

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Q156. What is backup and recovery

Ans.

Backup and recovery is the process of creating and restoring data in case of data loss or corruption.

  • Backup involves creating a copy of data to protect against data loss or corruption.

  • Recovery involves restoring the data from the backup in case of data loss or corruption.

  • There are different types of backups such as full, incremental, and differential backups.

  • Backup and recovery is important for ensuring business continuity and minimizing downtime.

  • Examples of backup and recove...read more

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Q157. Write API to save data

Ans.

API to save data in Java

  • Use HTTP POST method to send data to the server

  • Create a RESTful endpoint to handle the data saving

  • Validate the input data before saving it to the database

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Q158. Hashmap iteration ways

Ans.

There are multiple ways to iterate over a HashMap in Java.

  • Using keySet() and values() methods

  • Using entrySet() method

  • Using forEach() method with lambda expression

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Q159. Explain about test framework.

Ans.

Test framework is a set of guidelines, coding standards, and best practices to perform automated testing efficiently.

  • Test framework provides a structure for organizing and executing automated tests.

  • It includes libraries, tools, and utilities to simplify test creation and maintenance.

  • Test framework helps in reducing the time and effort required for testing.

  • Examples of test frameworks are Selenium, TestNG, JUnit, and NUnit.

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Q160. Top view of a binary tree

Ans.

A top view of a binary tree shows the nodes visible from the top when looking down from the root node.

  • The top view of a binary tree can be obtained by performing a level order traversal and keeping track of the horizontal distance of each node from the root.

  • Nodes with the same horizontal distance are at the same level in the top view.

  • Example: For the binary tree 1 -> 2 -> 3 -> 4 -> 5, the top view would be 1 -> 2 -> 3 -> 4 -> 5.

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Q161. What is replication

Ans.

Replication is the process of copying and distributing data from one database to another.

  • Replication is used to improve data availability and increase scalability.

  • It can be done in real-time or on a schedule.

  • There are different types of replication, such as snapshot replication, transactional replication, and merge replication.

  • Examples of replication software include Oracle GoldenGate, Microsoft SQL Server Replication, and MySQL Replication.

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Q162. Spring IOC and types.

Ans.

Spring IOC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is shifted to a container.

  • In Spring IOC, objects are created and managed by the Spring container.

  • Types of Spring IOC include Constructor-based dependency injection and Setter-based dependency injection.

  • Example: In Constructor-based dependency injection, dependencies are provided through the constructor of a class.

  • Example: In Setter-based dependency injection, dependencies ...read more

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Q163. Circuit Breaker and its states

Ans.

Circuit Breaker is a design pattern used in software development to prevent system overload and failures.

  • Circuit Breaker monitors the number of failures and opens when a threshold is reached.

  • It can be in states like closed, open, or half-open.

  • Closed state allows normal operation, open state prevents further requests, and half-open state allows limited requests to check if the system is back to normal.

  • Examples include Hystrix in Java and Polly in .NET.

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Q164. What is Threads?

Ans.

Threads are lightweight processes within a program that can run concurrently, allowing for multitasking and improved performance.

  • Threads allow for parallel execution of tasks within a program.

  • Threads share the same memory space, allowing for efficient communication and data sharing.

  • Examples of using threads include running background tasks while the main program continues to execute, or handling multiple client requests simultaneously in a server application.

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Q165. tell few SEO tools?

Ans.

Some popular SEO tools include SEMrush, Ahrefs, Moz, Google Search Console, and Screaming Frog.

  • SEMrush - for keyword research, site audits, and competitor analysis

  • Ahrefs - for backlink analysis and keyword tracking

  • Moz - for site audits, keyword research, and rank tracking

  • Google Search Console - for monitoring website performance in Google search results

  • Screaming Frog - for website crawling and technical SEO analysis

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Q166. What is upgradation

Ans.

Upgradation refers to the process of upgrading or updating a system or software to a newer version or better quality.

  • Upgradation involves replacing an older version of a system or software with a newer version.

  • It can also involve adding new features or improving the existing ones.

  • Upgradation is important to ensure that the system or software remains secure and compatible with other systems.

  • Examples of upgradation include upgrading from Windows 7 to Windows 10, or upgrading fr...read more

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Q167. 1.dsa for repeated array

Ans.

Implement a data structure and algorithm for finding repeated elements in an array.

  • Use a hash map to store the frequency of each element in the array.

  • Iterate through the array and update the frequency in the hash map.

  • Return the elements with frequency greater than 1 as the repeated elements.

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Q168. 2.dsa for sorting array

Ans.

Implementing DSA for sorting array of strings

  • Use a sorting algorithm like bubble sort, selection sort, or merge sort

  • Compare strings using built-in comparison functions or custom comparison functions

  • Ensure the sorting algorithm is efficient and handles edge cases

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Q169. JDBC Connection steps

Ans.

JDBC Connection steps

  • Load the JDBC driver class

  • Establish a connection to the database using the DriverManager class

  • Create a statement object to execute SQL queries

  • Execute the SQL query and retrieve the results

  • Process the results

  • Close the statement and connection

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Q170. Clousers in Javascript

Ans.

Closures are functions that have access to variables in their outer scope, even after the outer function has returned.

  • Closures are created when a function is defined inside another function.

  • The inner function has access to the outer function's variables and parameters.

  • Closures can be used to create private variables and methods.

  • Closures can also be used to create functions with pre-set arguments.

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Q171. Explain k8s in your infratsru

Ans.

K8s, short for Kubernetes, is a popular open-source container orchestration platform used for automating deployment, scaling, and management of containerized applications.

  • Kubernetes automates the deployment, scaling, and management of containerized applications.

  • It provides features like self-healing, load balancing, and rolling updates.

  • Kubernetes uses declarative configuration files to define the desired state of the application.

  • It supports various deployment strategies like ...read more

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Q172. JPA implementation

Ans.

JPA implementation is a Java specification for mapping Java objects to relational databases.

  • JPA stands for Java Persistence API.

  • It provides a set of annotations and APIs for managing relational data in Java applications.

  • JPA allows developers to write database-independent code.

  • It supports object-relational mapping (ORM) and provides features like entity mapping, query language, and transaction management.

  • Popular JPA implementations include Hibernate, EclipseLink, and OpenJPA.

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Q173. Implement Merge Sort

Ans.

Merge Sort is a divide and conquer algorithm that divides the input array into two halves, sorts them recursively, and then merges them.

  • Divide the array into two halves

  • Recursively sort each half

  • Merge the sorted halves back together

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Q174. Create linkedList

Ans.

A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.

  • Create a Node class with data and next pointer

  • Create a LinkedList class with methods like insert, delete, search

  • Example: Node class - class Node: def __init__(self, data): self.data = data self.next = None

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