VVDN Technologies Interview Questions, Process, and Tips

Q1. Basics of electronic devices
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Q2. Strong fundamental knowledge of design and pcb
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Aptitude, logic, reasoning and Embedded c , And Digital electronics questions.

Q1. Explain communication Protocol?
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Communication Protocol is a set of rules that allows two or more entities to communicate with each other.
• Communication protocols define the format, timing, sequencing, and error checking of data transmission.

• Examples include TCP/IP, HTTP, FTP, and SMTP.

• Protocols can be implemented in hardware, software, or a combination of both.

• They ensure that data is transmitted accurately and efficiently between devices.
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Q2. Write a Simple code of C language ?
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A simple code in C language can be a program to print 'Hello, World!' on the screen.
• Use the 'printf' function to print the text on the screen.

• Include the 'stdio.h' header file for input/output operations.

• Write the code within the 'main' function for execution.
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Q3. Write pointer code ?
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Pointer code is used in programming to store memory addresses of variables.
• Declare a pointer variable: int *ptr;

• Assign address of a variable to a pointer: ptr = &variable;

• Access value at the address stored in a pointer: *ptr = 10;
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Q4. What is the difference between structure and array?
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Structure is a user-defined data type that can hold different types of data, while an array is a collection of similar data types stored in contiguous memory locations.
• Structure can hold different types of data, while array can only hold one type of data.

• In a structure, you can define multiple variables of different data types, while in an array, all elements must be of the same data type.

• Example: struct Person { strin
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Q1. Product and Component related Questions .
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1. iOS basic
2.DS basic
3. higher order

Q1. Your career in 5 years
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Q2. Why you want to join this
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Q1. Self introduction
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Q2. Regarding labview
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Q1. How do you select a regulator
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Regulators are selected based on input/output voltage requirements, current capacity, efficiency, package size, and cost.
• Consider input/output voltage requirements

• Evaluate current capacity needed

• Look at efficiency ratings

• Take into account package size and form factor

• Compare costs of different regulators

• Examples: Linear regulators, switching regulators, voltage regulators
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Q2. Pcb guidelines for high speed,ddr
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PCB guidelines for high speed DDR include proper layout, impedance control, signal integrity, and power distribution.
• Proper layout is crucial for minimizing signal interference and ensuring signal integrity.

• Impedance control is important for matching the characteristic impedance of the traces to prevent signal reflections.

• Signal integrity can be improved by reducing noise, crosstalk, and ensuring proper termination.

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