10+ NOC Engineer Interview Questions and Answers for Freshers

GSM architecture includes multiple layers of OSI model for connectivity. Each layer has a specific function.

• GSM architecture consists of physical, data link, network, transport, and application layers.

• Physical layer handles the transmission of bits over the air interface.

• Data link layer provides error-free transmission of data frames.

• Network layer handles routing and addressing of data packets.

• Transport layer ensures reliable end-to-end data transfer.

• Application layer provide...read more

A series of technical questions related to networking and protocols.

• ARP is a protocol used to map an IP address to a physical address

• Telnet uses port 23 and SSH uses port 22 for remote access to network devices

• STP (Spanning Tree Protocol) prevents loops in a network by blocking redundant paths

• VTP (VLAN Trunking Protocol) allows for the propagation of VLAN information across a network

• VLANs (Virtual Local Area Networks) allow for logical segmentation of a network

• DHCP (Dynamic H...read more

DHCP stands for Dynamic Host Configuration Protocol. It is a network protocol that assigns IP addresses to devices on a network.

• DHCP automates the process of assigning IP addresses to devices on a network.

• It helps to avoid IP address conflicts and makes it easier to manage a large network.

• DHCP also provides other network configuration information, such as subnet mask and default gateway.

• Without DHCP, network administrators would have to manually assign IP addresses to each de...read more

Modulation techniques are used to encode information onto a carrier signal for transmission over a communication channel.

• Modulation techniques vary in terms of the type of carrier signal used (analog or digital), the type of modulation (amplitude, frequency, phase), and the complexity of the modulation scheme.

• Examples of modulation techniques include amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), and quadrature amplitude modulation (QAM).

• Modulati...read more

DNS is a system that translates domain names to IP addresses. DHCP assigns IP addresses to devices. FSMO is a role in Active Directory. Cluster is a group of servers working together.

• DNS stands for Domain Name System and is responsible for translating domain names to IP addresses.

• DHCP stands for Dynamic Host Configuration Protocol and assigns IP addresses to devices on a network.

• FSMO stands for Flexible Single Master Operations and is a role in Active Directory that controls ...read more

To create users in AD, use Active Directory Users and Computers console or PowerShell cmdlets.

• Open Active Directory Users and Computers console

• Right-click on the domain and select 'New' and then 'User'

• Fill in the required user information and click 'Next' until the user is created

• Alternatively, use PowerShell cmdlets like New-ADUser to create users programmatically

Routing protocol is a set of rules used by routers to determine the best path for data packets to reach their destination.

• Routing protocols help routers communicate with each other to share information about network topology.

• They use algorithms to calculate the best path for data packets based on factors like hop count, bandwidth, and delay.

• Examples of routing protocols include RIP, OSPF, EIGRP, and BGP.

Modulation is the process of varying a signal's characteristics to transmit information. TCP/IP is a protocol used for communication between devices. Guard band is a frequency band used to separate two channels.

• Modulation is used in radio communication to transmit information by varying the amplitude, frequency, or phase of a carrier wave.

• TCP/IP is a set of protocols used for communication between devices on a network. It includes protocols for data transmission, routing, and...read more

2G, 3G, and 4G are different generations of mobile network technology.

• 2G stands for second generation and is based on digital technology. It allows for basic voice and text communication.

• 3G stands for third generation and introduced mobile data and internet connectivity.

• 4G stands for fourth generation and offers faster internet speeds and improved data transfer rates.

• Examples of 2G networks include GSM and CDMA. Examples of 3G networks include UMTS and HSPA. Examples of 4G ne...read more

Protecting the 11kv transformer involves implementing proper maintenance, monitoring, and security measures.

• Regular maintenance checks to ensure proper functioning

• Installing surge protection devices to prevent damage from power surges

• Implementing temperature monitoring to prevent overheating

• Securing the transformer area to prevent unauthorized access

• Using proper grounding techniques to prevent electrical faults

Switch gear is a combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment.

• Understand the different components of switch gear such as disconnect switches, fuses, and circuit breakers.

• Learn how to operate and maintain switch gear according to manufacturer's guidelines.

• Follow safety procedures when working with switch gear to prevent electrical hazards.

• Regularly inspect switch gear for signs of wear or dam...read more

Switches and routers are networking devices used to connect devices within a network and route data between networks.

• Switches operate at the data link layer and forward data based on MAC addresses

• Routers operate at the network layer and forward data based on IP addresses

• Switches are used to create LANs, while routers are used to connect different networks

• Switches are faster than routers in forwarding data within a network

Protection of extra high voltage is crucial to prevent damage and ensure safety in electrical systems.

• Use surge arresters to protect against lightning strikes and voltage surges

• Implement ground fault protection to detect and isolate faults

• Install overcurrent protection devices to prevent damage from excessive current flow

• Regularly inspect and maintain protective devices to ensure they are functioning properly

Access modifiers are keywords in programming languages that define the accessibility of classes, methods, and variables.

• Access modifiers control the visibility and accessibility of classes, methods, and variables in a program.

• Common access modifiers include public, private, protected, and default (package-private).

• Public access modifier allows the class, method, or variable to be accessed from any other class.

• Private access modifier restricts access to only within the same cl...read more

Java features include platform independence, object-oriented programming, and automatic memory management.

• Platform independence - Java code can run on any platform with Java Virtual Machine (JVM)

• Object-oriented programming - Java supports classes, objects, inheritance, and polymorphism

• Automatic memory management - Java uses garbage collection to automatically manage memory

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

• The OSI model stands for Open Systems Interconnection model.

• It divides network communication into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and interacts with adjacent layers for data transmission.

• Example: The Physical layer deals with the physical connection b...read more