10+ British Council Interview Questions and Answers

Apache Spark supports several cluster managers including YARN, Mesos, and Standalone.

• YARN is the default cluster manager for Spark and is used for Hadoop-based clusters.

• Mesos is a general-purpose cluster manager that can be used with Spark, Hadoop, and other frameworks.

• Standalone is a simple cluster manager that comes bundled with Spark and is suitable for testing and development purposes.

Apache Spark is a fast and general-purpose cluster computing system.

• Distributed computing engine

• In-memory processing

• Supports multiple languages

• Machine learning and graph processing libraries

• Real-time stream processing

• Fault-tolerant

• Scalable

Spark is faster than MapReduce due to in-memory processing and DAG execution model.

• Spark uses in-memory processing while MapReduce uses disk-based processing.

• Spark has DAG (Directed Acyclic Graph) execution model while MapReduce has Map and Reduce phases.

• Spark supports real-time processing while MapReduce is batch-oriented.

• Spark has a higher level of abstraction and supports multiple languages while MapReduce is limited to Java.

• Spark has built-in libraries for SQL, streaming,...read more

RDD is a distributed collection of data while coalesce is a method to reduce the number of partitions in an RDD.

• RDD is immutable while coalesce creates a new RDD with fewer partitions

• RDD is used for parallel processing while coalesce is used for reducing the number of partitions

• RDD can be created from Hadoop InputFormats while coalesce is a method of RDD

• Example: rdd.coalesce(1) merges all partitions into a single partition

React is a JavaScript library for building user interfaces, known for its efficiency and flexibility.

• React allows for the creation of reusable UI components, making development faster and more efficient.

• It uses a virtual DOM to improve performance by only updating the necessary parts of the UI.

• React is popular for single-page applications and dynamic web interfaces.

• It is widely used in modern web development due to its declarative and component-based approach.

• React Native all...read more

RDD stands for Resilient Distributed Datasets in Pyspark, which are fault-tolerant collections of elements that can be processed in parallel.

• RDDs are the fundamental data structure in Pyspark.

• They are immutable and can be cached in memory for faster processing.

• RDDs can be created from Hadoop Distributed File System (HDFS), local file system, or by transforming existing RDDs.

• Examples of transformations include map, filter, and reduceByKey.

• Actions like count, collect, and saveA...read more

Props are used to pass data from parent to child components in React. Virtual DOM is a lightweight copy of the actual DOM for efficient updates.

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

• Virtual DOM is a concept in React where changes are first made to a lightweight copy of the actual DOM before being applied to the real DOM

• Virtual DOM helps in improving performance by minimizing the number of updates needed to the actual DOM

I have implemented WebLogic in my project by configuring and deploying applications on the WebLogic server.

• Configured WebLogic server by setting up domains, servers, and clusters

• Deployed applications on WebLogic server using deployment descriptors

• Managed application resources and services through WebLogic Console or WLST scripts

• Configured connection pools, data sources, and JMS resources

• Implemented security measures like SSL, authentication, and authorization

• Monitored server ...read more

The .py extension is used for Python source code files, while py files can refer to any file with the py extension.

• The .py extension is commonly used for Python scripts and modules.

• py files can refer to any file with the py extension, including Python source code files, but also other types of files such as text files or data files.

• The .py extension is recognized by Python interpreters and can be executed directly.

• py files may not necessarily be executable and their purpose d...read more

Parallel cursor technique is a database optimization technique that allows multiple queries to be executed simultaneously.

• Parallel cursor technique is used to improve the performance of database queries.

• It allows multiple queries to be executed simultaneously, reducing the overall query time.

• This technique is particularly useful for large databases with complex queries.

• Examples of databases that use parallel cursor technique include Oracle and SQL Server.

Var and const are variable declarations in JavaScript with different scopes. Var has function scope while const has block scope.

• Var has function scope, meaning it is accessible within the function it is declared in.

• Const has block scope, meaning it is accessible only within the block it is declared in.

• Var can be redeclared and reassigned, while const cannot be reassigned but can be mutated.

• Var is hoisted to the top of its function scope, while const is not hoisted.

In JavaScript, a promise is an object representing the eventual completion or failure of an asynchronous operation.

• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() method to handle success and failure cases.

• Example: const myPromise = new Promise((resolve, reject) => { ... });

I drive value for customers by prioritizing their needs, providing timely solutions, and ensuring their satisfaction.

• Understanding customer requirements and expectations

• Communicating effectively and promptly

• Taking ownership of issues and following through to resolution

• Seeking feedback and continuously improving processes

• Going above and beyond to exceed customer expectations

Java 8 introduced several new features such as lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have methods with implementations.

• Example: List names = Arrays.asList("Alice"...read more

A C program to generate Fibonacci series

• Use a loop to calculate Fibonacci numbers

• Store the numbers in an array

• Print the Fibonacci series