HCLTech Technical Lead Interview Questions, Process, and Tips

Program to find student names against a subject using stream API

• Create a list of students with their subjects

• Use stream API to filter the list based on the subject

• Map the filtered list to get only the names of students

• Collect the names in a list or any other data structure

• Return the list of names

Git workflow is a process of managing and tracking changes in codebase.

• Git workflow involves creating branches for new features or bug fixes

• Changes are made in the branch and then merged back to the main branch

• Pull requests are used for code review and approval before merging

• Common workflows include Gitflow, GitHub flow, and GitLab flow

To check string nullability using optional class, use optional binding to safely unwrap the optional string.

• Use if let or guard let statements to safely unwrap the optional string.

• If the optional string is nil, the code inside the if or guard statement will not execute.

• Example: if let myString = optionalString { //code to execute }

• Example: guard let myString = optionalString else { return } //code to execute if optiona