Qualcomm Physical Design Engineer Interview Questions and Answers

Q1. Electronic related questions were asked PCB related
Add your answer

Q1. Basic questions about your working in last company
Add your answer

Q1. Introduction about ourselves
Add your answer

Q1. Personal interview ( personality test )
Add your answer

Q1. What is aspect ratio?
Ans. 
Aspect ratio is the ratio of an object's width to its height.
• Aspect ratio is commonly used in design and engineering to maintain proportionality.

• It is often expressed as a ratio, such as 16:9 for a widescreen TV.

• Aspect ratio can affect the visual perception and usability of a product.

• It is important to consider aspect ratio when designing graphics or layouts for different devices or mediums.
Answered by AI
Add your answer
Q2. How do you decide stackup?
Ans. 
Stackup is decided based on the number of layers, signal integrity requirements, and manufacturing constraints.
• Consider the number of layers required for the design

• Evaluate signal integrity requirements and impedance control

• Take into account manufacturing constraints such as minimum trace width and spacing

• Balance cost and performance

• Use simulation tools to optimize the stackup

• Consult with PCB fabricators for their reco
Answered by AI
Add your answer

Basic aptitude questions

Q1. Tech questions related to domain
Add your answer

Q1. Genenral questions that are non technical
Add your answer

Q1. IV characterstics of CMOS inverter
Ans. 
IV characteristics of CMOS inverter show the relationship between input voltage and output current.
• CMOS inverter has two transistors - NMOS and PMOS connected in series.

• For low input voltage, NMOS is ON and PMOS is OFF, resulting in low output voltage.

• For high input voltage, NMOS is OFF and PMOS is ON, resulting in high output voltage.

• The transition between low and high output voltage occurs at the threshold voltage.

• Th...read more
Answered by AI
Add your answer
Q2. Set up and hold time explain
Ans. 
Set up time and hold time are timing requirements in digital circuits to ensure proper operation.
• Set up time is the minimum time before the clock edge that the input signal must be stable.

• Hold time is the minimum time after the clock edge that the input signal must be maintained stable.

• Violating set up time can lead to incorrect data being latched.

• Violating hold time can lead to metastability issues.

• Examples: In a flip...read more
Answered by AI
Add your answer