Qualcomm Job Interview

The Qualcomm selection for job was done in 3 stages - first screening round - paper based with subjective questions, then face to face technical rounds - 2-3 rounds and finally the HR round.

Technical Round:

• Design a Digital circuit for following functionality?
• X - input control 
• Y - input clock 
• Z - output 
• Conditions: when X = 0 --> Z = 0
• Conditions : when X = 1 --> Z = Y and Z should be glitch free.
• Inverter Operation and layout.
• Difference between Mealey and Moore Machine.
• Draw a State diagram to detect the sequence"0011" with overlapping conditions. 
• Explain delay Vs PVT conditions -
• Delay - voltage relations 
• Delay Vs Temperature relations 
• Delay Vs Process relations
• Write a verilog / VHDL code for the counter with reset condition.
• What happens if the delay is inside the sensitivity list and not ?
• Implement a XOR gate using Minimum number of gates/transistors.
• Implement using NAND gates.
• Implement using Pass transistors 
• Implement using the AND, OR and NOR gates
• Compare the above implementations in terms of the power, area and speed.
• Advantages and disadvantages of these implementations.
• Which is best implementation?
• Explain the project done by you ? - From Motivation to Implementation.
• Can we combine analog ground and digital ground to the same point ?
• IF Yes then at what level of abstraction - board level or package level, chip level or small modules or RTL level ?

I suggest going through these books for Digital Electronics preparation:

HR: (To read more about HR questions in other tech companies read here)

• Tell me about yourself !!
• About project done that you would like to talk about where you have worked in a team and displayed your soft-skills for better results :-)
• Why Qualcomm?
• Why are your percentages consistently low?
• What are your hobbies?
• What if Intel offers you a job after your internship at Intel? Will, you chose Intel or Qualcomm!!
• This is a question that you need to be mindful about !!
• Tell me something about your family?
• What is your technical interest domain?
•  Any questions from your side?

This is a book that I highly recommend for anyone to improve on their soft skills. This will not just help in your interviews but also in your day-to-day work.

Most Frequent Questions in HR round

These are the typical HR questions that are asked in Hi-Tech companies like Qualcomm, Intel, Cadence, Phillips.

The HR round is usually the final round in the job interview process:

Qualcomm HR round questions: (To read the Qualcomm tech questions click here)

1. Tell me about yourself !!
2. About project done :-)
3. Why Qualcomm ?
4. Why is your percentages consistently low ?
5. What are your hobbies ?
6. What if Intel offers you a job after you internship at Intel ? Will you chose Intel or Qualcomm!!
1. This is a question that you need to be mindful about !!
7. Tell me something about your family?
8. What is your technical interest domain ?
9.  Any questions from your side ?

 Phillips HR Round: (To read the Phillips tech questions click here)

1. Tell me about yourself.
2. Why did you want to do M.Tech?
3. What do you know about Philips?
4. Why you want to join Philips?
5. What new subjects have you learned in M.Tech?
6. What are your expectations from Philips Internship.

Cadence HR round: (To read the Phillips tech questions click here) 

1. Not a big deal when you have cleared the above two rounds,
2. Basic questiosn on your domain interest.
3. Facilities provided by company- stipend(very good).

Intel HR round: (To read the Intel tech questions click here)

1. The HR round is just a formality and they try to learn more about you as an individual. Be free and frank but polite at the same time.

Robert Bosch: (To read about Robert Bosch tech interview questions click here)

1. Tell me about yourself and your family.
2. Why should Robert Bosch hire you? (Tell 3 strengths with suitable examples to substantiate the same)
3. Why do you want to work for Robert Bosch?
4. Do you have any plans for further studies?
5. What are your achievements in the college so far?
6. Have you participated in the Robert Bosch Inscribe? Tell me about the paper you submitted.
7. Do you have any specific questions regarding the job?

This is a book that I highly recommend for anyone to improve on their soft skills. This will not just help in your interviews but also in your day-to-day work.

What is Linear Regression ?

Linear Regression

In statistics, linear regression is a linear approach to modeling the relationship between a scalar response (or dependent variable) and one or more explanatory variables (or independent variables). The case of one explanatory variable is called a simple linear regression. For more than one explanatory variable, the process is called multiple linear regression. 

Random Forest

Random forests 

Random forests or random decision forests are an ensemble learning method for classification, regression and other tasks that operates by constructing a multitude of decision trees at training time and outputting the class that is the mode of the classes (classification) or mean prediction (regression) of the individual trees. Random decision forests correct for decision trees' habit of overfitting to their training set.

Decision Tree

Decision Tree

A decision tree is a flowchart-like structure in which each internal node represents a "test" on an attribute (e.g. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (decision taken after computing all attributes). The paths from root to leaf represent classification rules.