Tata Technologies Interview Questions, Process, and Tips for Experienced

SparkSession is the entry point for programming Spark with the Dataset and DataFrame API.

• It replaces the older SQLContext and HiveContext in Spark 2.0 and later.

• Allows users to create DataFrames and execute SQL queries.

• Example: `val spark = SparkSession.builder.appName("MyApp").getOrCreate()`.

• Supports reading data from various sources like JSON, Parquet, and JDBC.

• Example: `val df = spark.read.json("path/to/file.json")`

Apache Spark is a unified analytics engine for big data processing, with built-in modules for streaming, SQL, machine learning, and graph processing.

• Spark operates on a cluster computing model, allowing distributed data processing.

• It uses Resilient Distributed Datasets (RDDs) for fault tolerance and parallel processing.

• Spark provides high-level APIs in Java, Scala, Python, and R, making it accessible to various develop...read more

OOP stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.

• OOP focuses on creating objects that contain data and methods to manipulate that data.

• Encapsulation, inheritance, and polymorphism are key principles of OOP.

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

Traveling to Kolkata typically takes around 2-3 hours by flight or 12-15 hours by train, depending on the starting location.

• By air: Flights from major cities like Delhi or Mumbai take about 2-3 hours.

• By train: Overnight trains from nearby states can take 12-15 hours.

• By road: Driving from neighboring states may take longer due to traffic and road conditions.

I tend to be overly critical of my own work, which can slow down my efficiency at times.

• I often spend too much time double-checking my work, which can lead to delays in meeting deadlines.

• I sometimes focus too much on minor details, losing sight of the bigger picture.

• I can be hesitant to delegate tasks, preferring to handle everything myself to ensure quality.

My future goal is to advance my career in quality inspection, ensuring high standards and continuous improvement in processes.

• Pursue certifications in quality management, such as Six Sigma or ISO standards.

• Aim for a leadership role where I can mentor junior inspectors and lead quality initiatives.

• Stay updated with industry trends and technologies to enhance inspection processes.

• Contribute to developing a culture of qua