HCLTech Interview Questions, Process, and Tips for Experienced

str.equals compares the content of two strings, while == compares the memory address of the strings.

• str.equals compares the actual content of two strings, while == compares the memory address of the strings.

• str.equals is a method of the String class in Java, while == is an operator for comparison.

• Example: String str1 = 'hello'; String str2 = 'hello'; str1.equals(str2) will return true, but str1 == str2 will return fals

A program demonstrating multithreading in Java

• Create a class that extends Thread or implements Runnable interface

• Use the start() method to begin execution of a thread

• Synchronize shared resources to avoid race conditions

ReactJS is a JavaScript library for building user interfaces.

• ReactJS allows for building reusable UI components.

• It uses a virtual DOM for better performance.

• ReactJS supports server-side rendering for SEO optimization.

• It follows a unidirectional data flow.

• ReactJS can be used with other libraries like Redux for state management.

useEffect hook is used in React to perform side effects in function components.

• Executes side effects in function components

• Runs after every render by default

• Can specify dependencies to control when it runs

• Used for data fetching, subscriptions, or manually changing the DOM

Java code to print all the zeros at the end of the array

• Iterate through the array from the end

• Check if the element is '0'

• Print the element if it is '0'

Java code to print the repeated words in a sentence

• Split the sentence into words using split() method

• Create a HashMap to store word frequency

• Iterate through the words and update the frequency in the HashMap

• Print the words with frequency greater than 1

Java code to print the repeated letters in a given name/words

• Iterate through each character in the input string

• Use a HashMap to store the count of each character

• Print the characters with count greater than 1

Cucumber is a BDD framework that allows writing test cases in simple English sentences.

• Uses Gherkin syntax to write feature files in plain English

• Supports automation testing for behavior-driven development

• Integrates with various programming languages like Java, Ruby, etc.

• Helps in collaboration between technical and non-technical team members

Technical infrastructure refers to the underlying framework that supports the operation of a system or organization.

• Includes hardware, software, networks, and facilities

• Ensures the smooth functioning of technology systems

• Supports communication, data storage, and processing

• Examples: servers, routers, databases, cloud services

Automation in IT industries helps streamline processes, increase efficiency, reduce errors, and save time and resources.

• Automation helps streamline repetitive tasks and workflows, allowing for faster and more efficient processes.

• It reduces the chances of human error, leading to improved accuracy and reliability.

• Automation can save time and resources by completing tasks more quickly and consistently.

• It enables IT profes...read more