HCLTech Senior Software Engineer Interview Questions, Process, and Tips

C is a programming language used for system programming and embedded systems.

• C is a low-level language with direct access to memory and hardware.

• Java is a high-level language that runs on a virtual machine, while Node.js is a runtime environment for JavaScript.

• Rating oneself in n code is subjective and depends on individual experience and skill level.

Collections are data structures that store groups of related objects. There are different types of collections in programming.

• Arrays - a collection of elements of the same data type

• Lists - a collection of elements that can be of different data types

• Sets - a collection of unique elements

• Maps - a collection of key-value pairs

• Queues - a collection that follows the FIFO (First In First Out) principle

• Stacks - a collection t...read more

Joins are used to combine rows from two or more tables based on a related column between them. Truncate removes all records from a table, while delete removes specific records. Indexes in SQL are used to quickly retrieve data. String builder is a class that helps in creating strings efficiently. Rank and dense rank are functions used to assign a rank to each row in a result set. Performance tuning involves optimizing t...read more