HCLTech Interview Questions, Process, and Tips

Q1. Bare metal code for blinking an LED,
Ans. 
Blinking an LED using bare metal code involves directly manipulating hardware registers without an operating system.
• Access the GPIO register for the specific pin connected to the LED

• Set the pin as an output

• Toggle the pin state at regular intervals to create the blinking effect
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Q2. Different types of pointers, volatile variable, storage classes, Static and extern keywords, ISR,
Ans. 
Different types of pointers, volatile variable, storage classes, Static and extern keywords, ISR
• Pointers: Null pointer, void pointer, function pointer

• Volatile variable: Used to indicate that a variable may be changed by external factors

• Storage classes: auto, register, static, extern

• Static keyword: Used to declare variables that are only accessible within the same file

• Extern keyword: Used to declare variables that are d...read more
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Q1. Find nth largest number in a jumbled array
Ans. 
Use sorting to find the nth largest number in a jumbled array.
• Sort the array in descending order.

• Access the nth element in the sorted array to find the nth largest number.
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Q2. Deeper questions on static, compilation
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Q1. What is a VPN, and how does it work?
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Q2. What steps would you take if the server were to go down?
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Q1. Tell me about your experience and challenges
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Q2. What type of SOX testing have you worked on
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Q1. Java Question spring boot question
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Q2. Spring Aop, rest api
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Q3. Spring security
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Q1. Salary discussion,why tou want to join
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First round was Aptitude which was quite easy

Q1. Resume bases Question
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Q2. Question on OOPS
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Q1. Resume and scenario based question
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Q1. Introduce yourself
Ans. 
I am a software developer with 5 years of experience in Java and Python.
• Experienced in Java and Python programming languages

• Worked on developing web applications using Spring framework

• Familiar with Agile development methodologies
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Q2. What challenges do you faced during your project and how you approached them
Ans. 
I faced challenges with integrating third-party APIs and resolved them by thoroughly researching documentation and seeking help from colleagues.
• Integrating third-party APIs required understanding complex documentation

• Encountered issues with data formatting and authentication

• Collaborated with team members to troubleshoot and find solutions
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