10+ VVDN Technologies Qa Automation Testing Engineer Interview Questions and Answers

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 removed from the ARP table.

• ARP Poisoning is a type of atta...read more

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)

• Capture frames using tools like Wireshark for packet analysi...read more

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.

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 rules.

• For example, in a company network, VLANs can be set ...read more

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 smaller domains for better management and reduced routing tra...read more

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 branded by a specific company.

• White box switches are often ...read more

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 it is reachable.

• ICMP can also be used for other purposes ...read more

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.

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 is faster and more efficient for real-time applications lik...read more

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 roadmap for the testing process and ensures that all necessar...read more

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.

• Devices send a DHCP request to the server when they connect t...read more

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 and Wi-Fi, while Layer3 protocols include IP and ICMP.