Vivo Interview Questions, Process, and Tips for Freshers

Topic is technology time is 20 min

This is very easy for me, because I knew the answer

Q1. Tell me the types of solder paste used in smt
Ans. 
Types of solder paste used in SMT include leaded, lead-free, water-soluble, no-clean, and low-temperature.
• Leaded solder paste contains lead and is commonly used in electronics manufacturing.

• Lead-free solder paste is environmentally friendly and complies with regulations such as RoHS.

• Water-soluble solder paste can be easily cleaned with water after soldering.

• No-clean solder paste leaves minimal residue after soldering a...read more
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Q2. Tell me the process of smt
Ans. 
SMT (Surface Mount Technology) is a process used in electronics manufacturing to mount electronic components directly onto the surface of a printed circuit board (PCB).
• Components are placed onto the PCB using pick-and-place machines.

• Solder paste is applied to the PCB pads before components are placed.

• The PCB is then heated in a reflow oven to melt the solder and create a permanent connection.

• SMT allows for smaller, lig...read more
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Q3. Tell me the zones name of reflow oven
Ans. 
The zones name of a reflow oven typically include preheat, soak, reflow, and cooling zones.
• Preheat zone

• Soak zone

• Reflow zone

• Cooling zone
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Q4. Tell me the different types of issues in smt
Ans. 
Different types of issues in SMT include solder joint defects, component misalignment, and insufficient solder paste.
• Solder joint defects: such as cold solder joints, insufficient solder, or solder bridges

• Component misalignment: components not placed correctly on the PCB

• Insufficient solder paste: can lead to incomplete solder joints or poor connections
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Q5. What are the role of esd
Ans. 
ESD stands for Electrostatic Discharge. Its role is to prevent damage to electronic components.
• Preventing damage to electronic components

• Protecting sensitive equipment from electrostatic discharge

• Implementing ESD control measures in manufacturing facilities

• Training employees on ESD prevention techniques
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Q6. What is wi,Twi.
Ans. 
Wi,Twi is a programming language used for statistical computing and graphics.
• Wi,Twi is a dialect of the R programming language.

• It is commonly used for data analysis, statistical modeling, and visualization.

• Wi,Twi has a large number of packages available for various statistical tasks.

• Some popular packages in Wi,Twi include ggplot2 for data visualization and dplyr for data manipulation.
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Q1. What is 7 qc tools
Ans. 
7 QC tools are a set of basic statistical tools used for quality control and process improvement.
• Check sheet: Used to collect and organize data in a structured format.

• Histogram: Represents data distribution visually to identify patterns and trends.

• Pareto chart: Helps prioritize issues by showing the most significant factors affecting quality.

• Cause-and-effect diagram (Fishbone diagram): Identifies root causes of problem...read more
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Logical mathematics and General awareness questions

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