Tech Mahindra
20+ Bhavani Erectors Interview Questions and Answers
Q1. How to release previous IP which assign to your device?
To release previous IP assigned to a device, use the command 'ipconfig /release' in Windows or 'sudo dhclient -r' in Linux.
Open Command Prompt or Terminal
Type 'ipconfig /release' for Windows or 'sudo dhclient -r' for Linux
Press Enter
Wait for the command to complete
The previous IP address will be released
Q2. How to check DNS, IP, & GATEWAY?
To check DNS, IP, and GATEWAY, you can use command line tools like ipconfig (Windows) or ifconfig (Linux/Mac).
For DNS, use the command 'ipconfig /all' on Windows or 'cat /etc/resolv.conf' on Linux/Mac.
For IP, use the command 'ipconfig' on Windows or 'ifconfig' on Linux/Mac.
For Gateway, use the command 'ipconfig' on Windows or 'netstat -nr' on Linux/Mac.
Q3. What is the difference between static IP address and Dynamic IP address?
Static IP address is fixed and does not change, while Dynamic IP address changes frequently.
Static IP address is manually assigned to a device and remains the same until changed.
Dynamic IP address is automatically assigned by a DHCP server and changes each time the device connects to the network.
Static IP address is useful for servers, printers, and other devices that need a consistent IP address.
Dynamic IP address is more common for personal devices like laptops and smartpho...read more
Q4. How many class of IP & its range?
There are 5 classes of IP addresses: A, B, C, D, and E. Each class has a different range of IP addresses.
Class A: 1.0.0.0 to 126.0.0.0
Class B: 128.0.0.0 to 191.255.0.0
Class C: 192.0.0.0 to 223.255.255.0
Class D: 224.0.0.0 to 239.255.255.255
Class E: 240.0.0.0 to 255.255.255.255
Q5. What is modem and how it is used?
A modem is a device that converts digital signals to analog signals and vice versa, allowing computers to communicate over telephone lines.
Modem stands for modulator-demodulator.
It is used to connect a computer to the internet via a telephone line.
It converts digital signals from the computer into analog signals that can be transmitted over the phone line.
It also converts analog signals from the phone line into digital signals that the computer can understand.
There are differ...read more
Q6. What are routers?
Routers are networking devices that forward data packets between computer networks.
Routers connect multiple devices to the internet or other networks
They use routing tables to determine the best path for data to travel
Routers can be wired or wireless, and can be used in homes, businesses, and data centers
Examples of popular router brands include Cisco, Netgear, and TP-Link
Q7. Can you explain defrance between Hardware & Software.
Hardware refers to physical components of a computer while software refers to programs and applications that run on the computer.
Hardware includes components such as the motherboard, CPU, RAM, and hard drive.
Software includes programs such as Microsoft Office, Adobe Photoshop, and web browsers.
Hardware is tangible and can be physically touched while software is intangible and cannot be physically touched.
Hardware can be upgraded or replaced while software can be updated or un...read more
Q8. Which neural network is preferred in image processing
Convolutional Neural Networks (CNN) are preferred in image processing.
CNNs are specifically designed for processing structured grid data like images.
They are able to automatically learn features from the input images.
CNNs have been widely used in tasks such as image classification, object detection, and image segmentation.
Popular CNN architectures include AlexNet, VGG, ResNet, and Inception.
Q9. Difference between router & switch?
A router connects multiple networks and directs traffic between them, while a switch connects devices within a network.
Routers operate at the network layer (Layer 3) of the OSI model, while switches operate at the data link layer (Layer 2).
Routers use routing tables to determine the best path for data to travel between networks, while switches use MAC addresses to direct data to the correct device within a network.
Routers can provide security by blocking or allowing traffic b...read more
Q10. What is mean by technical support Engineer
Technical Support Engineer provides technical assistance to customers and resolves their technical issues.
Assist customers with technical issues
Troubleshoot and diagnose problems
Provide solutions and recommendations
Communicate effectively with customers
Document and track issues
Collaborate with other teams
Stay up-to-date with technology
Examples: software, hardware, networking, mobile devices
Q11. What is anonymous FTP?
Anonymous FTP allows users to access files on a server without providing login credentials.
Users can download files without needing a username or password
Can be used for public file sharing or distribution
Can pose security risks if not properly configured
Example: ftp://ftp.debian.org/debian/
Q12. What is subnet mask?
Subnet mask is a 32-bit number used to divide an IP address into network and host addresses.
Determines the network portion of an IP address
Used in conjunction with IP address to identify network and host
Common subnet masks include 255.255.255.0 and 255.255.0.0
Q13. What is APIPA?
APIPA stands for Automatic Private IP Addressing. It is a feature in Windows operating systems that allows a computer to assign itself an IP address when DHCP is not available.
APIPA assigns a unique IP address in the range of 169.254.0.1 to 169.254.255.254
It is used when a computer cannot obtain an IP address from a DHCP server
APIPA is enabled by default on Windows operating systems
It is not recommended to use APIPA in a network environment as it can cause IP address conflict...read more
Q14. What is mean by technical support
Technical support refers to the assistance provided to customers who are experiencing technical issues with a product or service.
Technical support involves troubleshooting and resolving technical issues
It can be provided through various channels such as phone, email, chat, or in-person
Technical support engineers need to have strong technical knowledge and communication skills
Examples of technical support include helping customers set up and configure software, resolving hardw...read more
Q15. Topology and it's type
Topology refers to the arrangement of nodes and connections in a network. Common types include bus, star, ring, and mesh.
Bus topology: all devices are connected to a single cable
Star topology: all devices are connected to a central hub or switch
Ring topology: devices are connected in a circular loop
Mesh topology: every device is connected to every other device
Q16. What are overfitting and underfitting?
Overfitting and underfitting are common problems in machine learning where a model either learns the training data too well or fails to capture the underlying patterns.
Overfitting occurs when a model is too complex and learns noise in the training data rather than the underlying pattern.
Underfitting occurs when a model is too simple and fails to capture the underlying pattern in the training data.
Overfitting can be detected when a model performs well on the training data but ...read more
Q17. Advantage and disadvantage of smart phones
Smartphones offer convenience and connectivity but can also lead to distractions and privacy concerns.
Advantage: Convenient access to information, communication, and entertainment
Advantage: Enhanced productivity with apps and tools
Disadvantage: Potential distractions from notifications and social media
Disadvantage: Privacy concerns with data collection and security risks
Q18. Advantage and disadvantage of online education
Online education offers flexibility but lacks in-person interaction.
Advantage: Flexibility to study at own pace and schedule.
Advantage: Access to a wide range of courses and resources from anywhere.
Disadvantage: Lack of in-person interaction with teachers and peers.
Disadvantage: Potential for distractions and lack of motivation without a structured environment.
Disadvantage: Limited hands-on learning experiences for certain subjects like lab work or practical skills.
Q19. What is gradient descent?
Gradient descent is an optimization algorithm used to minimize a function by iteratively moving in the direction of steepest descent.
Gradient descent is commonly used in machine learning to optimize the parameters of a model by minimizing the cost function.
It works by calculating the gradient of the cost function with respect to each parameter and updating the parameters in the opposite direction of the gradient.
The learning rate determines how big of a step to take in the di...read more
Q20. What is down sampling
Down sampling is the process of reducing the sampling rate of a signal.
Down sampling reduces the number of samples in a signal while maintaining important information.
It is commonly used in digital signal processing to decrease the data size and processing requirements.
An example of down sampling is converting a 48 kHz audio signal to 44.1 kHz for CD audio.
Q21. What is Active directory
Active Directory is a directory service that stores information about network resources and enables centralized management.
Active Directory is a service provided by Microsoft Windows Server operating systems.
It stores information about users, computers, groups, and other network resources.
It enables centralized management of network resources, such as user authentication, access control, and policy enforcement.
Active Directory uses a hierarchical structure with domains, trees...read more
Q22. Dora Process in networking
DORA process in networking refers to Discovery, Offer, Request, and Acknowledge stages in DHCP communication.
DORA process stands for Discovery, Offer, Request, and Acknowledge in DHCP communication
Discovery: Client broadcasts a DHCPDISCOVER message to find available DHCP servers
Offer: DHCP server responds with a DHCPOFFER message containing IP address lease information
Request: Client sends a DHCPREQUEST message to request the offered IP address
Acknowledge: DHCP server sends a...read more
Q23. Standard operating procedure
Standard operating procedure is a set of step-by-step instructions compiled by an organization to help workers carry out routine operations.
SOPs are used to ensure consistency and quality in processes.
They outline the steps to be followed, the sequence of those steps, and the responsibilities of each team member.
SOPs are often used in technical support to troubleshoot issues and provide consistent solutions.
Examples of SOPs in technical support include guidelines for handling...read more
Q24. DNS In networking
DNS is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
DNS stands for Domain Name System
It translates domain names (e.g. www.google.com) to IP addresses (e.g. 172.217.3.206)
DNS servers store DNS records which contain information about domain names and their corresponding IP addresses
DNS resolution process involves querying multiple DNS servers until the correct IP address is found
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