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I applied via Referral and was interviewed in Nov 2021. There were 3 interview rounds.
Conductor, insulator and semiconductor are materials that conduct electricity in different ways.
Conductors allow electricity to flow through them easily, such as copper and aluminum wires.
Insulators do not allow electricity to flow through them easily, such as rubber and plastic.
Semiconductors have properties of both conductors and insulators, such as silicon and germanium.
The conductivity of a material can be measured...
Semiconductors are used in electronics for their ability to control the flow of electricity.
Semiconductors have a unique property of being able to switch between conducting and insulating states.
They are used in transistors, diodes, and integrated circuits.
Examples include silicon, germanium, and gallium arsenide.
The most used semiconductor in electronics is silicon.
Silicon is abundant and has excellent semiconductor properties.
It is used in microprocessors, memory chips, and other electronic components.
Other semiconductors like germanium and gallium arsenide are also used in specialized applications.
Silicon is preferred due to its low cost, high reliability, and ease of manufacturing.
Advancements in silicon technology have led...
Semiconductor doping is used to make a semiconductor p-type or n-type by introducing impurities with different valence electrons.
To make a semiconductor p-type, impurities with three valence electrons (e.g., boron) are added.
To make a semiconductor n-type, impurities with five valence electrons (e.g., phosphorus) are added.
Doping alters the conductivity and creates majority and minority charge carriers.
P-type has holes...
Biasing is the process of providing a DC voltage or current to establish a desired operating point for electronic components.
Biasing is used to ensure that electronic components operate within their specified range.
It involves setting the appropriate voltage or current levels to achieve the desired performance.
Biasing is commonly used in transistors, amplifiers, and other electronic circuits.
There are different types o...
Zener diode is used as a voltage regulator and to protect circuits from overvoltage.
Zener diode maintains a constant voltage across its terminals when reverse biased
It is used in voltage regulator circuits to provide a stable output voltage
Zener diodes are also used to protect circuits from overvoltage by shunting excess voltage to ground
They are commonly used in power supplies, voltage regulators, and surge protectors
Logic gates are electronic circuits that perform logical operations on one or more inputs to produce an output.
Logic gates are used in digital electronics to create complex circuits and perform mathematical operations.
There are several types of logic gates, including AND, OR, NOT, NAND, NOR, XOR, and XNOR gates.
Logic gates are the building blocks of digital circuits, and are used in everything from simple calculators t
There are three basic logic gates: AND, OR, and NOT.
AND gate outputs 1 only if all inputs are 1
OR gate outputs 1 if any input is 1
NOT gate outputs the opposite of its input
XOR is a logical operator that returns true if and only if both inputs are different.
XOR is represented by the symbol ^.
The truth table of XOR has two inputs and one output.
If both inputs are the same, the output is false. Otherwise, the output is true.
Header files contain declarations of functions, variables, and data structures used in a program.
Header files are included at the beginning of a source code file using #include directive
They provide information about the functions and variables used in the program
They help in avoiding redefinition of functions and variables
Examples of header files are stdio.h, math.h, string.h, etc.
A program to find prime numbers
Start with a loop to iterate through numbers
Check if each number is divisible by any number less than itself
If not, add it to a list of prime numbers
I was interviewed in Jan 2025.
ARP stands for Address Resolution Protocol. It is used to map IP addresses to MAC addresses on a local network.
ARP is used to resolve IP addresses to MAC addresses on a local network.
ARP works by broadcasting a request for the MAC address of a specific IP address on the network.
Yes, ARP entries can be deleted using the 'arp -d' command.
ARP entries have a timeout period, typically around 2 minutes, after which they are ...
DHCP stands for Dynamic Host Configuration Protocol, used to automatically assign IP addresses to devices on a network.
DHCP is a network protocol that allows a server to automatically assign IP addresses to devices on a network.
It helps in reducing the manual effort required to configure IP addresses for each device.
DHCP servers maintain a pool of IP addresses and lease them to devices for a specific period of time.
Dev...
TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two different protocols used for data transmission over networks.
TCP is a connection-oriented protocol that ensures reliable and ordered delivery of data packets.
UDP is a connectionless protocol that does not guarantee delivery or order of packets.
TCP uses handshaking to establish a connection between sender and receiver before data transfer.
UDP i...
VLAN stands for Virtual Local Area Network, used to logically segment a network into multiple virtual networks.
VLANs help in improving network security by isolating traffic between different departments or groups.
They can also help in optimizing network performance by reducing broadcast traffic.
VLANs are configured at the switch level and allow devices in different VLANs to communicate with each other based on routing ...
STP stands for Software Test Plan. It is a document that outlines the testing strategy, objectives, resources, and schedule for a software testing project.
STP defines the scope, approach, resources, and schedule of testing activities.
It helps in identifying the test environment, test deliverables, and test execution schedule.
STP also includes the roles and responsibilities of the testing team members.
It serves as a roa...
To check network connectivity speed, use tools like speedtest.net. Debug by checking for network congestion or hardware issues. Increase frame size by adjusting MTU. Capture frames using tools like Wireshark.
Use tools like speedtest.net to check network connectivity speed
Debug by checking for network congestion, hardware issues, or misconfigured settings
Increase frame size by adjusting Maximum Transmission Unit (MTU)
Ca...
Layer2 and Layer3 are network layers in the OSI model, responsible for data transmission and routing.
Layer2 (Data Link Layer) operates at the MAC address level, handling physical addressing and error detection.
Layer3 (Network Layer) operates at the IP address level, handling routing and logical addressing.
Layer2 switches operate at Layer2, while routers operate at Layer3.
Examples of Layer2 protocols include Ethernet an...
ICMP stands for Internet Control Message Protocol. It is used for network troubleshooting and diagnostic purposes.
ICMP is a protocol used by network devices to communicate error messages or operational information.
Ping is a tool that uses ICMP to send echo requests to a target host and waits for an echo reply.
Ping works by sending an ICMP echo request packet to the target host, which then responds with an echo reply if...
RIP is a distance vector routing protocol while OSPF is a link-state routing protocol. OSPF uses Dijkstra algorithm for routing.
RIP stands for Routing Information Protocol and OSPF stands for Open Shortest Path First.
RIP uses hop count as the metric for path selection while OSPF uses cost.
OSPF is more scalable and efficient than RIP as it converges faster and supports VLSM.
OSPF uses areas to divide the network into sma...
Cisco switches are known for their reliability, advanced features, and high price point compared to other company switches.
Cisco switches are known for their high quality and reliability.
Cisco switches offer advanced features such as VLAN support, QoS, and security options.
Cisco switches are typically more expensive than switches from other companies.
White box switches are generic, off-the-shelf switches that are not b...
SONIC cards are a type of prepaid card used for making purchases at SONIC Drive-In restaurants.
Prepaid cards used at SONIC Drive-In restaurants
Can be used to pay for food and drinks
Can be reloaded with funds as needed
Python program to move all zeros to the end of a list while maintaining the order of non-zero elements.
Iterate through the input list and separate non-zero elements into one list and zeros into another list.
Concatenate the non-zero list with the zero list to get the desired output.
Print the final list with zeros at the end.
Print a pattern of stars in a pyramid shape.
Use nested loops to print spaces and stars in the desired pattern.
Start with one star at the top and increase the number of stars in each row.
Adjust the spacing to create the pyramid shape.
I applied via Company Website and was interviewed in Sep 2024. There was 1 interview round.
I am a dedicated Junior Engineer with a strong background in production and a proven track record of successfully implementing process improvements.
Bachelor's degree in Mechanical Engineering
Experience in optimizing production processes to increase efficiency
Proficient in CAD software for designing production layouts
Implemented a new scheduling system that reduced production downtime by 20%
To fix a mistake, I analyze the root cause, take responsibility, communicate with stakeholders, and implement a solution.
Analyze the root cause of the mistake to understand what went wrong
Take responsibility for the mistake and acknowledge it to relevant parties
Communicate with stakeholders to keep them informed about the situation
Implement a solution to rectify the mistake and prevent it from happening again
Example: I...
I take full responsibility for my mistake in not double-checking the production schedule, resulting in a delay in delivery.
Acknowledge the mistake without making excuses
Explain what went wrong and how it could have been prevented
Discuss steps taken to rectify the mistake and prevent it from happening again
Prioritizing self-care is essential for maintaining overall well-being and gaining perspective in life.
Make time for activities that bring you joy and relaxation, such as reading, exercising, or spending time with loved ones.
Practice mindfulness and self-reflection to understand your emotions and thoughts better.
Set boundaries to protect your mental and physical health, such as saying no to additional work when you're ...
VVDN Technologies interview questions for popular designations
I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.
Qualifier and Primary are annotations used in Spring framework for dependency injection.
Qualifier annotation is used to specify which bean should be autowired when multiple beans of the same type are present
Primary annotation is used to specify the primary bean to be autowired when multiple beans of the same type are present
Qualifier can be used in combination with Autowired annotation to specify the bean name to be in...
Sort an array of 0s and 1s in linear time complexity.
Use two pointers approach - one from the start and one from the end.
Swap 0s to the left and 1s to the right until the pointers meet.
Time complexity: O(n), Space complexity: O(1).
I actively participate in code reviews to ensure code quality and learn from others.
I actively participate in code reviews by providing constructive feedback on others' code.
I also seek feedback on my own code to improve its quality and learn from others.
I follow coding standards and best practices during code reviews to maintain consistency and quality.
I use code review tools like GitHub pull requests or Bitbucket to
Get interview-ready with Top VVDN Technologies Interview Questions
Aptitude, electronics
A pointer is a variable that stores the memory address of another variable.
Pointers are used to access and manipulate memory locations directly.
They are commonly used in programming languages like C and C++.
Example: int *ptr; // declares a pointer to an integer variable
When a device is powered on, several processes occur including booting up the operating system, initializing hardware components, loading necessary drivers, and launching user interface.
Booting up the operating system
Initializing hardware components
Loading necessary drivers
Launching user interface
I applied via Walk-in and was interviewed before Feb 2022. There were 5 interview rounds.
IOT Product based Testing
Types of testing include unit testing, integration testing, system testing, acceptance testing, and regression testing.
Unit testing: Testing individual components or modules of a software.
Integration testing: Testing how different modules work together.
System testing: Testing the entire system as a whole.
Acceptance testing: Testing to ensure the system meets the requirements of the stakeholders.
Regression testing: Test...
Whats about self knowledge
I applied via Recruitment Consulltant and was interviewed in Jul 2024. There were 4 interview rounds.
Middleware and filters are components in ASP.NET Core that allow you to handle requests and responses in the pipeline.
Middleware are components that are added to the request pipeline to handle requests and responses.
Filters are used to implement cross-cutting concerns like logging, exception handling, and authorization.
Middleware can be used to modify the request or response before it reaches the controller action.
Filt...
I applied via Campus Placement
Normal aptitude question
I prefer C++ for its performance and versatility.
C++ is known for its high performance and efficiency.
C++ is a versatile language that can be used for a wide range of applications.
C++ allows for low-level memory manipulation, making it suitable for embedded systems.
Examples: Developing firmware for microcontrollers, implementing real-time systems.
C is faster than Java or Python due to its lower-level nature and direct hardware access.
C is a low-level language that allows for direct memory manipulation and hardware access, resulting in faster performance.
Java and Python are higher-level languages with more abstractions, leading to slower execution compared to C.
C code is compiled directly to machine code, while Java and Python code are typically interpreted or r...
SAP system landscape refers to the arrangement of SAP systems in a network environment.
SAP system landscape includes development, quality assurance, and production environments.
It involves multiple servers, databases, and clients working together.
Each landscape is tailored to meet the specific needs of the organization.
Changes are typically made in the development environment before being moved to production.
Examples o...
Shop floor configuration for production order includes work center, routing, production version, and material master data.
Define work centers for operations
Create routing with sequence of operations
Maintain production version for BOM explosion
Ensure material master data is accurate
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The duration of VVDN Technologies interview process can vary, but typically it takes about less than 2 weeks to complete.
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