200+ Ericsson Interview Questions and Answers

As a team leader, I would identify the reason for the delay and work with the employee to find a solution to complete the work on time.

• Have a one-on-one meeting with the employee to understand the reason for the delay

• Identify any roadblocks or challenges the employee is facing and work together to find a solution

• Set clear expectations and deadlines for the employee to complete the work

• Provide support and resources to help the employee complete the work on time

• Regularly check ...read more

Reverse a given string containing alphabets, numbers, and special characters.

• Iterate through the string from the end to the beginning and append each character to a new string.

• Use built-in functions like reverse() or StringBuilder in languages like Python or Java for efficient reversal.

• Handle special characters and numbers while reversing the string.

• Ensure to consider the constraints on the length of the string and the number of test cases.

Financial and cost control is the process of monitoring and managing project expenses to ensure they stay within budget.

• Developing a detailed budget plan

• Tracking expenses and comparing them to the budget plan

• Identifying and addressing cost overruns

• Negotiating with vendors to get the best prices

• Implementing cost-saving measures

• Regularly reporting on financial status to stakeholders

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

Answers to questions related to Network Engineer job interview

• GSM module is a hardware device that enables communication between mobile devices and cellular networks

• The architecture of GSM module consists of a SIM card, a microcontroller, a power supply, and a radio transceiver

• GSM module uses digital signal

• ADC stands for Analog to Digital Converter and DAC stands for Digital to Analog Converter

• Python is a high-level programming language used for web development, data analysis...read more

Assumptions of a linear regression model include linearity, independence, homoscedasticity, and normality.

• Linearity: The relationship between the independent and dependent variables is linear.

• Independence: The residuals are independent of each other.

• Homoscedasticity: The variance of the residuals is constant across all levels of the independent variables.

• Normality: The residuals are normally distributed.

• No multicollinearity: The independent variables are not highly correlated...read more

Multicollinearity in regression analysis causes issues like inflated standard errors, unstable coefficients, and difficulty in interpreting the importance of predictors.

• Multicollinearity leads to inflated standard errors, making it difficult to determine the significance of predictors.

• It causes unstable coefficients, as small changes in the data can result in large changes in the coefficients.

• Interpreting the importance of predictors becomes challenging, as multicollinearity ...read more

Use the COUNT DISTINCT function in SQL to find the number of unique values in a database.

• Use the COUNT DISTINCT function along with the column name to count the number of unique values in that column.

• For example, SELECT COUNT(DISTINCT column_name) FROM table_name;

• You can also use GROUP BY to find the number of unique values for multiple columns.

Default loopback IP address is 127.0.0.1 and private IPs are reserved for internal networks.

• Default loopback IP address is used to test network software without connecting to a network.

• Private IPs are reserved for internal networks and cannot be accessed from the internet.

• Private IP ranges include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.

Kubernetes is an open-source container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Pods are the smallest deployable units in Kubernetes, while VMs are complete virtual machines with their own operating system and hardware resources.

• Types of services in Kubernetes include ClusterIP, NodePort, LoadBalancer, and ExternalName.

• 4G and 5G are different generations of mobile network technology, with 5G offering faster speeds...read more

CRC stands for Cyclic Redundancy Check. It is an error-detecting code used in network communication to ensure data integrity.

• CRC is a mathematical algorithm that generates a fixed-size checksum for a block of data.

• The checksum is appended to the data and is recalculated at the receiving end to check for errors.

• If the calculated checksum doesn't match the received checksum, it indicates that the data has been corrupted during transmission.

• CRC helps in detecting errors caused b...read more

Different measures used to evaluate classification model performance

• Accuracy: Overall correctness of the model's predictions

• Precision: Proportion of true positive predictions among all positive predictions

• Recall: Proportion of true positive predictions among all actual positives

• F1 Score: Harmonic mean of precision and recall

• Confusion Matrix: Summarizes the performance of a classification model

The command 'update-grub' has to be executed to reflect changes made in grub persistently.

• The 'update-grub' command updates the grub configuration file with the changes made.

• It is important to run this command after making any changes to ensure they are saved.

• The command can be run with sudo privileges.

• Example: sudo update-grub

Grub version in Linux and RHEL

• The current version of Grub in Linux is 2.04

• RHEL 8.4 currently uses Grub version 2.02

• Grub is a bootloader used to load the operating system at startup

2G, 3G, and 4G call flow are the processes involved in establishing and maintaining a mobile phone call.

• 2G call flow involves circuit-switched technology and uses Time Division Multiple Access (TDMA) for voice transmission.

• 3G call flow uses packet-switched technology and supports both voice and data transmission.

• 4G call flow uses Long-Term Evolution (LTE) technology and provides high-speed data transmission.

• All call flows involve processes such as authentication, registration...read more

To build a web application, I would use a combination of front-end technologies like HTML, CSS, and JavaScript, along with back-end technologies like Node.js and MongoDB.

• Use HTML for structuring the content of the web pages

• Use CSS for styling the web pages and making them visually appealing

• Use JavaScript for adding interactivity to the web pages and handling user input

• Use Node.js for server-side scripting and handling server-side logic

• Use MongoDB as the database to store and ...read more

Process life cycle in an operating system involves creation, execution, termination, and resource management.

• Creation: When a process is created, it is assigned a unique process ID and allocated necessary resources.

• Execution: The process is then scheduled by the operating system to run on the CPU.

• Termination: Once the process completes its task or is terminated by the user, it is removed from memory.

• Resource Management: The operating system manages resources such as CPU time,...read more

A hub operates at the physical layer and broadcasts data to all devices on the network, while a switch operates at the data link layer and forwards data only to the intended recipient.

• Hub operates at the physical layer, while switch operates at the data link layer

• Hub broadcasts data to all devices on the network, while switch forwards data only to the intended recipient

• Switch is more efficient and secure compared to a hub

Multiprocessing involves multiple processors executing multiple tasks simultaneously, while multiprogramming involves multiple programs sharing a single processor by switching between them.

• Multiprocessing utilizes multiple processors to execute multiple tasks concurrently.

• Multiprogramming involves multiple programs sharing a single processor by switching between them.

• Multiprocessing is more efficient in terms of performance as tasks can run simultaneously on different process...read more

Windows XP and Windows 7 are both operating systems developed by Microsoft, but they have several key differences.

• User interface: Windows 7 has a more modern and user-friendly interface compared to Windows XP.

• Performance: Windows 7 is generally faster and more stable than Windows XP.

• Security: Windows 7 has more advanced security features and updates compared to Windows XP.

• Hardware support: Windows 7 supports newer hardware and technologies better than Windows XP.

• Compatibility...read more

Files can be transferred from one server to another using tools like SCP, SFTP, or rsync.

• Use SCP (Secure Copy Protocol) to securely transfer files between servers. Example: scp file.txt user@server2:/path/to/directory

• Use SFTP (SSH File Transfer Protocol) for interactive file transfers. Example: sftp user@server2

• Use rsync for efficient synchronization of files between servers. Example: rsync -avz file.txt user@server2:/path/to/directory

An Object-Oriented Database Management System (OODBMS) is a type of database management system that supports the creation and management of objects in a database.

• OODBMS stores data in the form of objects, which can contain attributes and methods.

• It allows for complex data structures and relationships to be represented more easily.

• Examples of OODBMS include db4o, ObjectDB, and ObjectStore.

Different protocols supported at each OSI layer

• Layer 1 (Physical): Ethernet, Wi-Fi, Bluetooth

• Layer 2 (Data Link): MAC, PPP, HDLC

• Layer 3 (Network): IP, ICMP, ARP

• Layer 4 (Transport): TCP, UDP, SCTP

• Layer 5 (Session): NetBIOS, PPTP

• Layer 6 (Presentation): SSL, TLS

• Layer 7 (Application): HTTP, FTP, SMTP

ABIS over IP and ABIS over TDM are two different methods of transmitting biometric data.

• ABIS over IP uses internet protocol to transmit biometric data while ABIS over TDM uses time-division multiplexing.

• ABIS over IP is more flexible and scalable than ABIS over TDM.

• ABIS over TDM is more reliable and secure than ABIS over IP.

• ABIS over IP is suitable for remote locations while ABIS over TDM is suitable for local networks.

• Examples of ABIS over IP include MorphoWave Compact and Cr...read more

Check for any processes or open files using the file system, then force unmount if necessary.

• Check for any processes or applications currently using the file system with 'lsof' command

• Kill any processes that are using the file system if necessary

• Try unmounting the file system again using 'umount -l' to force unmount if needed

Reinvent the Bisleri bottle with a sleek design, eco-friendly materials, and a built-in filter for on-the-go purification.

• Use biodegradable materials like bamboo or cornstarch-based plastics

• Incorporate a minimalist design with a unique shape or texture

• Add a filter to purify water from any source

• Offer customization options like color or engraving

• Include a reusable straw or spout for easy drinking

To improve DL throughput in good RF condition, optimize antenna tilt, increase sector capacity, and reduce interference.

• Optimize antenna tilt to improve signal strength and reduce interference

• Increase sector capacity by adding more carriers or using advanced modulation techniques

• Reduce interference by identifying and mitigating sources of interference

• Ensure proper network planning and optimization to maximize DL throughput

• Use advanced technologies like MIMO and beamforming to...read more

Disadvantages of logistic regression

• Assumes linearity between independent variables and log odds of the dependent variable

• Prone to overfitting with large number of features

• Not suitable for complex relationships or non-linear data

• Can't handle missing values well

Clustering is grouping similar data points together. Adding partial repository Qm to full repository Qm requires merging the two clusters.

• Clustering is used in data mining and machine learning to group similar data points together.

• Partial repository Qm can be added to full repository Qm by merging the two clusters.

• Examples of clustering algorithms include k-means, hierarchical clustering, and DBSCAN.

Daily operational activities case studies

• Case study of optimizing production line for efficiency

• Case study of implementing new safety protocols in a manufacturing plant

• Case study of troubleshooting and resolving technical issues in a software development team

• Case study of streamlining inventory management in a retail store

• Case study of improving customer service processes in a call center

Angular is a popular front-end framework for building web applications, with components being the building blocks of Angular applications.

• Angular is a front-end framework developed by Google for building web applications.

• Components are the basic building blocks of Angular applications, each representing a part of the user interface.

• To debug Angular code, developers can use tools like Chrome DevTools or Angular's built-in debugging tools.

• Angular components have lifecycle hooks...read more

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers.

• Physical Layer: Deals with the physical connection between devices. Example: Ethernet cables.

• Data Link Layer: Responsible for node-to-node communication. Example: MAC addresses.

• Network Layer: Manages routing of data packets. Example: IP addresses.

• Transport Layer: Ensures end-to-end communication. Example:...read more

Load balancing involves distributing network traffic across multiple servers to optimize resource utilization and prevent overload.

• Parameters for load balancing include server health, server capacity, and current network traffic.

• To improve various KPIs like VDR, HOSR, Initial ERAB, CQI, and SSSR, you can adjust load balancing algorithms, optimize server performance, and monitor network traffic.

• For example, you can use round-robin, least connections, or weighted round-robin al...read more

Call transfers to a different operator involve redirecting the call from one operator to another.

• Call transfer can be initiated by the caller or the current operator.

• The caller can request a transfer by providing the desired operator's extension or department.

• The current operator can transfer the call by using a transfer button or dialing the desired operator's extension.

• During the transfer, the caller may be put on hold or hear a transfer announcement.

• Once the call is transf...read more

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

• 3G (Third Generation) provides faster data transfer speeds compared to 2G.

• 2G (Second Generation) introduced digital voice communication and basic data services.

• 4G (Fourth Generation) offers even faster data transfer speeds, low latency, and improved network capacity.

• Examples of 3G networks include UMTS and CDMA2000, while 2G networks include GSM and IS-95.

• 4G networks include LTE (Long-Term Evolution) and Wi...read more

To configure DHCP in a router through CMD, use the 'ip dhcp pool' command and specify the network and default gateway.

• Open CMD and access the router's CLI

• Enter 'enable' to access privileged mode

• Enter 'configure terminal' to enter global configuration mode

• Enter 'ip dhcp pool [pool name]' to create a DHCP pool

• Specify the network and default gateway using the 'network' and 'default-router' commands

• Exit configuration mode and save changes with 'exit' and 'write memory'

• Example: 'i...read more

To configure VLAN in a router through CMD, use the 'vlan' command and specify the VLAN ID and name.

• Open CMD and connect to the router's console

• Enter 'enable' to access privileged mode

• Enter 'configure terminal' to enter global configuration mode

• Enter 'vlan [VLAN ID]' to create the VLAN

• Enter 'name [VLAN name]' to assign a name to the VLAN

• Exit configuration mode by entering 'exit'

• Save the configuration by entering 'write memory'

• Example: 'vlan 10' and 'name Sales' will create a V...read more

Measures to check performance of classification model

• Accuracy

• Precision

• Recall

• F1 Score

• ROC Curve

• Confusion Matrix

APN redirection, 3GDT, MME/SGSN pooling, APN configuration, and SBA in 5G are topics related to mobile network architecture.

• APN redirection is the process of redirecting a user's data traffic to a different Access Point Name (APN) than the one originally requested.

• 3GDT stands for 3G Direct Tunneling, which allows for direct communication between the User Equipment (UE) and the Serving Gateway (SGW) without going through the Packet Data Network Gateway (PGW).

• MME/SGSN pooling i...read more

RDBMS is a type of DBMS that stores data in a structured format with relationships between tables.

• RDBMS enforces referential integrity and allows for normalization of data.

• DBMS is a general term for any system that manages databases, while RDBMS specifically refers to relational databases.

• Examples of RDBMS include MySQL, Oracle, and SQL Server.

• Examples of DBMS include MongoDB and Redis.

2G, 3G, and 4G are mobile network technologies with different architectures.

• 2G uses circuit-switched technology and is primarily used for voice calls and text messaging.

• 3G uses packet-switched technology and offers faster data transfer rates than 2G.

• 4G uses all-IP packet-switched technology and provides even faster data transfer rates than 3G.

• 4G also supports advanced features like VoLTE and carrier aggregation.

• Each generation of technology builds upon the previous one, with ...read more

The solution is to troubleshoot the issue and identify the root cause of the problem.

• Check if the script is properly configured and scheduled

• Verify if there are any errors or conflicts in the system

• Debug the script to identify any coding issues

• Consult with other team members or experts for assistance

• Implement a backup plan or contingency measures to minimize impact

• Document the issue and solution for future reference

Azure is a cloud computing platform by Microsoft. Azure Blob Storage is a service for storing large amounts of unstructured data. ARM stands for Azure Resource Manager, used for managing resources in Azure. Horizontal scaling is increasing the number of instances of a service to distribute load.

• Azure is a cloud computing platform by Microsoft

• Azure Blob Storage is a service for storing large amounts of unstructured data

• ARM stands for Azure Resource Manager, used for managing r...read more

The required technology on site depends on the specific field and industry.

• The technology required for field maintenance engineering may include: diagnostic tools, monitoring systems, communication devices, and safety equipment.

• Examples of technology used in field maintenance engineering include: thermal imaging cameras, vibration analyzers, ultrasonic detectors, and gas detectors.

• Other industries may require different technology, such as medical equipment for healthcare faci...read more

4G technical network operation, planning and design

• Understanding of LTE/4G network architecture and protocols

• Knowledge of radio frequency planning and optimization

• Experience in designing and implementing 4G networks

• Familiarity with network performance monitoring and troubleshooting

• Ability to work with vendors and stakeholders to ensure network reliability and scalability

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

OSI layer is a conceptual model that describes the communication functions of a telecommunication or computing system.

• OSI stands for Open Systems Interconnection.

• It has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has its own protocols and functions.

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

Tuple is immutable and ordered while list is mutable and ordered.

• Tuple uses () while list uses []

• Tuple is faster than list for accessing elements

• Tuple can be used as keys in dictionaries while list cannot

• Tuple is used for heterogeneous data while list is used for homogeneous data

Multicollinearity in regression analysis affects the accuracy and interpretability of the model.

• Multicollinearity occurs when two or more independent variables are highly correlated.

• It leads to unstable and unreliable estimates of regression coefficients.

• It reduces the precision of the estimates and increases the standard errors.

• It makes it difficult to interpret the individual effects of the independent variables.

• It can be detected using correlation matrix, variance inflatio...read more

Transaction codes are used to execute specific functions in SAP system.

• Transaction codes are shortcuts to access specific functions in SAP system

• They are used to execute specific tasks such as creating purchase orders, invoices, etc.

• Transaction codes are four-character codes that can be entered in the command field of SAP system

• Examples of transaction codes are ME21N for creating purchase orders, VF01 for creating invoices, etc.

Approach business problem with data science by understanding the problem, collecting relevant data, analyzing data, and presenting insights.

• Understand the business problem and define the objective

• Collect relevant data from various sources

• Clean and preprocess the data

• Analyze the data using statistical and machine learning techniques

• Present insights and recommendations to stakeholders

• Iterate and refine the approach as necessary

Transport network refers to the infrastructure that enables the movement of people, goods, and information.

• Transport network includes roads, railways, airports, seaports, and communication networks.

• It plays a crucial role in the economy by facilitating trade and commerce.

• Examples of transport networks include the interstate highway system in the US and the European railway network.

• Transport network planning involves optimizing routes, modes of transportation, and infrastructu...read more

Variables are stored in stack in a last-in-first-out (LIFO) order.

• Stack is a portion of memory used for temporary storage

• Variables are pushed onto the stack when they are declared

• When a function is called, its variables are pushed onto the stack

• When the function returns, the variables are popped off the stack

• Stack overflow can occur if too many variables are pushed onto the stack

LTE is a standard for wireless broadband communication while VoLTE is a technology that enables voice calls over LTE network.

• LTE stands for Long-Term Evolution and is a standard for wireless broadband communication.

• VoLTE stands for Voice over LTE and is a technology that enables voice calls over LTE network.

• LTE is used for data transfer while VoLTE is used for voice calls.

• VoLTE provides better call quality and faster call setup time compared to traditional voice calls.

• VoLTE r...read more

Different techniques for injecting beans in application context

• Constructor Injection

• Setter Injection

• Field Injection

• Method Injection

C code for printing Fibonacci Series upto n elements

• Declare three variables to store the current, previous and next numbers in the series

• Initialize the previous and current variables to 0 and 1 respectively

• Use a loop to print the next number in the series by adding the previous two numbers

• Loop should run n times to print n elements in the series

Triggering is a mechanism to initiate a process or action based on a specific event or condition.

• Triggering is commonly used in software development to automate tasks or processes.

• Channel triggering is a type of triggering where a specific channel or communication medium is used to initiate an action.

• For example, a chatbot can be triggered to respond to a user's message in a specific channel like Slack or Facebook Messenger.

• Channel triggering can also be used in IoT devices w...read more

Isolation Forest is an anomaly detection algorithm that works by isolating outliers in a dataset.

• Isolation Forest is an unsupervised machine learning algorithm used for anomaly detection.

• It works by randomly selecting a feature and then randomly selecting a split value between the maximum and minimum values of the selected feature.

• The number of splits required to isolate an outlier is used as a measure of its abnormality.

• Evaluation metrics for Isolation Forest in layman's ter...read more

A cell is a geographic area covered by a base station in a cellular network.

• A cell is the basic unit of a cellular network.

• It is a geographic area covered by a base station.

• Each cell has a unique identifier and can handle multiple calls simultaneously.

• As a mobile device moves from one cell to another, the call is handed off to the new cell.

• Cells can vary in size depending on the population density and terrain.

• Examples of cellular networks include GSM, CDMA, and LTE.

Resource management is the process of planning, allocating, and optimizing resources to achieve organizational goals.

• It involves identifying the resources needed for a project or task

• Allocating those resources in an efficient manner

• Monitoring and controlling resource usage to ensure optimal performance

• Examples include managing personnel, finances, equipment, and time

• Effective resource management can lead to increased productivity and cost savings

Project management is the process of planning, organizing, and overseeing the execution of a project from start to finish.

• It involves defining project goals and objectives

• Creating a project plan and timeline

• Assigning tasks and responsibilities to team members

• Monitoring progress and making adjustments as needed

• Ensuring that the project is completed on time, within budget, and meets the desired quality standards

• Examples include building construction, software development, and e...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

OOPS concepts are fundamental principles of object-oriented programming that help in designing and implementing software systems.

• Encapsulation - bundling of data and methods that operate on that data

• Inheritance - creating new classes from existing ones

• Polymorphism - ability of objects to take on multiple forms

• Abstraction - hiding implementation details and showing only functionality

• Examples - Java, C++, Python, Ruby

To design scalable and reliable distributed applications, consider factors like load balancing, fault tolerance, and data partitioning.

• Use load balancers to distribute traffic evenly across multiple servers

• Implement fault tolerance by replicating data and services across multiple nodes

• Partition data to distribute it across multiple nodes and avoid bottlenecks

• Use caching to reduce the load on the database

• Implement auto-scaling to handle sudden spikes in traffic

• Use message queu...read more

Single RAN is a network architecture that allows multiple wireless technologies to be supported on a single physical network.

• Single RAN stands for Single Radio Access Network.

• It enables multiple wireless technologies such as 2G, 3G, 4G, and 5G to be supported on a single physical network.

• This reduces the need for multiple hardware and software components, resulting in cost savings and simplified network management.

• Single RAN also allows for easier network upgrades and expansi...read more

Cloud computing is the delivery of computing services over the internet, allowing users to access and store data on remote servers.

• Cloud computing allows users to access data and applications from any device with an internet connection.

• The basic deployment models of cloud computing are public, private, hybrid, and community clouds.

• Public clouds are owned and operated by third-party cloud service providers, offering resources like storage and virtual machines to the public.

• Pri...read more

Logistic regression assumes linear relationship between independent and dependent variables.

• May not perform well with non-linear data

• May overfit or underfit the data

• May be sensitive to outliers

• May require large sample size for stable results

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

• Layer 1 - Physical layer: Deals with physical connections and transmission of raw data. Example: Ethernet

• Layer 2 - Data link layer: Manages data transfer between devices on the same network. Example: MAC addresses

• Layer 3 - Network layer: Handles routing and forwarding of data packets. Example: IP addresses

• Layer 4 - Transport layer: Ens...read more

2G, 3G, 4G, and 5G are different generations of mobile network technology.

• 2G refers to second-generation mobile networks that primarily provided voice and text messaging services.

• 3G introduced faster data transfer speeds, enabling internet browsing, video calling, and multimedia services.

• 4G further improved data speeds, offering high-quality video streaming, online gaming, and advanced mobile applications.

• 5G is the fifth generation of mobile network technology, designed to pr...read more

OSI model devices are specific to each layer of the model, facilitating communication between devices.

• Layer 1 (Physical): hubs, repeaters, cables

• Layer 2 (Data Link): switches, bridges

• Layer 3 (Network): routers, layer 3 switches

• Layer 4 (Transport): gateways, firewalls

• Layer 5 (Session): not applicable

• Layer 6 (Presentation): encryption/decryption devices

• Layer 7 (Application): servers, workstations

4G parameters in KPI are key performance indicators that measure the performance of a 4G network.

• 4G parameters in KPI include metrics such as signal strength, signal quality, throughput, latency, and handover success rate.

• These parameters help assess the overall performance and quality of a 4G network.

• For example, signal strength is measured in dBm and indicates the power level of the received signal.

• Throughput measures the data transfer rate in Mbps, indicating the network's...read more

GSM and CDMA are two different technologies used in mobile communication.

• GSM uses SIM cards while CDMA does not.

• GSM allows for easy switching of phones while CDMA does not.

• GSM has better international roaming capabilities than CDMA.

• CDMA has better call quality and network capacity than GSM.

• GSM is more widely used globally while CDMA is mostly used in the US and parts of Asia.

You can schedule a job regularly using cron jobs in Linux.

• Use the crontab command to edit the cron table

• Specify the schedule using the appropriate syntax (minute, hour, day of month, month, day of week)

• For example, to schedule a job to run every day at 3am, you would add the following line to the cron table: 0 3 * * * /path/to/command

Hard links and soft links are two types of links used in Unix-like operating systems to create shortcuts to files.

• Hard links are direct pointers to the inode of a file, while soft links are indirect pointers to the file name.

• Hard links cannot link directories or files on different filesystems, while soft links can.

• If the original file is deleted, hard links will still point to the data, while soft links will be broken.

• Example: 'ln file1 file2' creates a hard link, 'ln -s file...read more

The microprocessor 8085 has a total of 40 output pins.

• The microprocessor 8085 is an 8-bit microprocessor.

• It has a total of 40 pins, which are used for various purposes.

• These pins include address bus pins, data bus pins, control pins, and power supply pins.

• Some of the output pins are used for sending signals to external devices or peripherals.

• Examples of output pins in the microprocessor 8085 include the RD (Read) pin and the WR (Write) pin.

BGP is a routing protocol used to exchange routing information between different networks on the internet.

• BGP stands for Border Gateway Protocol.

• It is used to connect different autonomous systems (AS) on the internet.

• BGP is a path-vector protocol, which means it selects the best path for data to travel based on a number of factors such as shortest path, least number of hops, etc.

• BGP is used by internet service providers (ISPs) to exchange routing information with each other.

• B...read more

To check IP route through CMD, use the 'route print' command.

• Open Command Prompt

• Type 'route print' and press Enter

• The IP route table will be displayed

• You can filter the results using various parameters like destination IP, interface, etc.

AAA and AAAA queries are DNS queries used to retrieve IPv4 and IPv6 addresses respectively.

• AAA query is used to retrieve IPv4 address of a domain name.

• AAAA query is used to retrieve IPv6 address of a domain name.

• AAA and AAAA queries are part of DNS (Domain Name System) protocol.

• AAA and AAAA records are stored in DNS servers.

• Example: AAA query for google.com will return 172.217.166.142.

• Example: AAAA query for google.com will return 2a00:1450:4001:81a::200e.

ITIL fundamentals are a set of best practices for IT service management.

• ITIL stands for Information Technology Infrastructure Library

• It includes processes for service strategy, design, transition, operation, and continual improvement

• ITIL helps organizations align their IT services with business needs and improve efficiency

• Examples of ITIL processes include incident management, problem management, and change management

VOLTE stands for Voice over LTE. It is a technology that allows voice calls to be made over a 4G LTE network.

• VOLTE uses IP packets to transmit voice calls over the LTE network

• It provides better call quality and faster call setup times compared to traditional 2G/3G networks

• VOLTE also allows for simultaneous voice and data usage on the same network

• Examples of VOLTE-enabled devices include iPhone 6 and above, Samsung Galaxy S6 and above, and Google Pixel

• VOLTE requires both the d...read more

Routers are networking devices that forward data packets between computer networks.

• Routers connect multiple networks together and determine the best path for data to travel.

• They use routing tables to make decisions about where to send data packets.

• Routers can also provide security by blocking unwanted traffic and filtering incoming data.

• Examples of routers include home routers, enterprise routers, and core routers used by internet service providers.

A deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource.

• Occurs in multitasking environments where processes compete for limited resources

• Can be resolved using techniques like deadlock prevention, deadlock avoidance, and deadlock detection

• Example: Process A holds Resource X and waits for Resource Y, while Process B holds Resource Y and waits for Resource X

Jenkins is an open-source automation server used for continuous integration and continuous delivery (CI/CD) pipelines.

• Jenkins helps automate the building, testing, and deployment of software projects.

• It allows for easy integration with various tools and technologies such as Git, Docker, and Maven.

• Jenkins provides a web-based user interface for easy configuration and monitoring of jobs.

• It supports plugins to extend its functionality and customize workflows.

• Jenkins helps in imp...read more

The location for deploying a machine should be decided based on factors like latency, data sovereignty, cost, and regulatory compliance.

• Consider latency - Choose a location closer to end users to reduce latency.

• Data sovereignty - Ensure compliance with data protection laws by deploying in a location that meets regulatory requirements.

• Cost - Evaluate the cost of deployment in different locations, including infrastructure and operational expenses.

• Regulatory compliance - Conside...read more

Switches are networking devices that connect devices together and enable communication between them.

• Switches forward data packets between devices on a network

• They use MAC addresses to identify devices and determine where to send data

• Switches can improve network performance by reducing network congestion

• They can also enhance network security by isolating traffic between devices

• Examples of switches include Ethernet switches, LAN switches, and data center switches

We use a centralized document management system to handle complex situations and ensure smooth transition during location changes.

• We have a dedicated team responsible for managing and updating all documentation.

• We use a cloud-based document management system to ensure easy access and collaboration.

• During complex situations, we prioritize communication and documentation to ensure everyone is on the same page.

• When there is a location change, we ensure all documentation is updat...read more

Modulation is the process of varying a carrier signal in order to transmit information.

• Amplitude Modulation (AM) - varying the amplitude of the carrier signal

• Frequency Modulation (FM) - varying the frequency of the carrier signal

• Phase Modulation (PM) - varying the phase of the carrier signal

• Quadrature Amplitude Modulation (QAM) - combining amplitude and phase modulation

• Pulse Amplitude Modulation (PAM) - varying the amplitude of discrete pulses

• Pulse Width Modulation (PWM) - va...read more

To remove elements from a list, use the remove() method or list comprehension.

• Use the remove() method to remove a specific element from the list.

• Use list comprehension to remove multiple elements based on a condition.

• Example: myList.remove('element') or myList = [x for x in myList if x != 'element']

There are multiple transaction codes used in Supply Chain. Some common ones are ME21N, ME22N, ME23N, ME51N, ME52N, and ME53N.

• ME21N - Create Purchase Order

• ME22N - Change Purchase Order

• ME23N - Display Purchase Order

• ME51N - Create Purchase Requisition

• ME52N - Change Purchase Requisition

• ME53N - Display Purchase Requisition