HCLTech Team Leader (Technical) Interview Questions and Answers

Apache Spark is a fast and general-purpose cluster computing system. Apache Kafka is a distributed streaming platform.

• Apache Spark is used for big data processing and analytics, providing in-memory computing capabilities.

• Apache Kafka is used for building real-time data pipelines and streaming applications.

• Apache Spark can be integrated with Apache Kafka for real-time data processing.

• Both Apache Spark and Apache Kafka a...read more

Data formats used in Spark include JSON, Parquet, Avro, and ORC.

• JSON: Lightweight data interchange format

• Parquet: Columnar storage format optimized for query performance

• Avro: Compact, fast, and efficient binary format

• ORC: Optimized Row Columnar format for large-scale data processing

Intercompany refers to transactions between two or more companies within the same group, while intracompany refers to transactions within the same company.

• Intercompany transactions involve entities that are part of the same corporate group.

• Intracompany transactions occur within a single company.

• Intercompany transactions are typically eliminated during consolidation to avoid double counting.

• Intracompany transactions are...read more

Code test to find a pair of numbers in an array that equals a target number.

• Loop through the array and check if the difference between the target and current number exists in the array.

• Use a hash table to store the numbers and their indices for faster lookup.

• Sort the array and use two pointers to find the pair.