30+ Nexus Telecom Interview Questions and Answers

Troubleshooting various technical issues in a support role

• For a process hanging, check the system logs and identify the process causing the issue. Use tools like strace or lsof to identify the root cause.

• For slow system performance, check CPU, memory, and disk usage. Use tools like top, iostat, and vmstat to identify the bottleneck.

• For network latency issues, use tools like ping, traceroute, and tcpdump to identify the source of the latency.

• For cluster failover issues, check ...read more

To create a new user without useradd or add user command, use the usermod command.

• Use the usermod command with the -u option to create a new user

• Specify the username and user ID as arguments

• Example: usermod -u 1001 newuser

• Create a home directory for the new user manually

Yes, group name can be changed. The procedure involves accessing the group settings and editing the name.

• Access the group settings

• Click on the group name

• Edit the name

• Save changes

The root user name can be changed by modifying the /etc/passwd file.

• Open the /etc/passwd file in a text editor

• Locate the line that starts with 'root'

• Change the username in the first field to the desired name

• Save and close the file

• Restart the system or use the 'su' command to switch to the new username

Program to print all Prime Numbers up to the input number using Prime Sieve Algorithm.

• Create a boolean array of size n+1 and initialize all values as true.

• Loop through the array starting from 2 and mark all multiples of each prime number as false.

• Print all the numbers that are still marked as true in the array.

During customer escalations, I focus on active listening, empathy, and finding a solution that meets the customer's needs.

• Listen actively to the customer's concerns and acknowledge their frustration

• Empathize with the customer's situation and show that you understand their perspective

• Collaborate with the customer to find a solution that meets their needs and addresses their concerns

• Communicate clearly and transparently with the customer throughout the escalation process

• Follow ...read more

No, two different users cannot have the same UID.

• UID (User ID) is a unique identifier assigned to each user in a system.

• Having two different users with the same UID can cause conflicts and security issues.

• UIDs are typically assigned sequentially and are unique within a system.

• For example, in Linux systems, UID 0 is reserved for the root user and cannot be assigned to any other user.

Node.js uses an event-driven, non-blocking I/O model for concurrency handling.

• Node.js uses an event loop to handle concurrency.

• It allows multiple requests to be processed simultaneously.

• Callbacks are used to handle I/O operations asynchronously.

• Node.js also supports worker threads for CPU-intensive tasks.

• Concurrency can be improved by optimizing code and using caching.

To set a user expiry date, you can use a combination of user management tools and scripting languages.

• Use user management tools like Active Directory or LDAP to set an expiry date for a user account.

• In Active Directory, you can set the 'Account Expires' attribute for a user to specify the expiry date.

• In LDAP, you can set the 'shadowExpire' attribute to specify the expiry date.

• You can also use scripting languages like PowerShell or Python to automate the process of setting use...read more

I was stuck in a situation where a customer was unhappy with our product, but using my CSM skills, I was able to turn the situation around and deliver a successful outcome.

• Identified the root cause of the customer's dissatisfaction

• Engaged in active listening to understand the customer's concerns

• Developed a personalized action plan to address the issues

• Provided ongoing support and follow-up to ensure customer satisfaction

• Utilized data analytics to track progress and measure su...read more

I overcame a roadblock on product performance by collaborating with the technical team to identify and resolve the issue, ensuring a positive customer experience.

• Identified the specific issue impacting product performance

• Collaborated with the technical team to troubleshoot and find a solution

• Communicated transparently with the customer about the issue and resolution

• Implemented necessary changes to prevent similar roadblocks in the future

SAN stands for Storage Area Network, a specialized high-speed network that connects servers to storage devices.

• SAN allows multiple servers to access shared storage resources like disk arrays or tape libraries.

• It provides block-level access to storage, allowing for efficient data transfer.

• SANs are typically used in enterprise environments for centralized storage management.

• Examples of SAN technologies include Fibre Channel and iSCSI.

Automation framework is a set of guidelines and rules for creating and maintaining automated tests. Pytest is a testing framework for Python.

• Automation framework provides a structure for organizing test cases, test data, and test scripts.

• Pytest is a popular testing framework that supports test automation, fixtures, and parameterization.

• Pytest execution involves running test cases, reporting test results, and generating test reports.

• Pytest can be integrated with other tools su...read more

It is difficult to provide an exact number of iPhone users in Hyderabad without access to specific data.

• There is no official data available on the exact number of iPhone users in Hyderabad.

• One way to estimate the number of iPhone users in Hyderabad is to look at the market share of Apple in India and apply it to the population of Hyderabad.

• Another approach could be to conduct a survey or study specifically targeting iPhone users in Hyderabad.

To change home directory for new users, modify the useradd command with the -d flag.

• Use the useradd command with the -d flag followed by the desired home directory path

• For example: useradd -d /new/home/directory username

• Verify the changes by checking the /etc/passwd file or using the id command

Scenarios and troubleshooting skills are evaluated by presenting hypothetical situations and assessing the candidate's ability to identify and resolve technical issues.

• Demonstrate logical thinking and problem-solving skills

• Show ability to analyze and diagnose technical problems

• Explain steps taken to troubleshoot and resolve issues

• Provide examples of past experiences in troubleshooting technical issues

Linux is an open-source operating system kernel that manages hardware resources and provides services for user programs.

• Linux is a Unix-like operating system kernel developed by Linus Torvalds in 1991.

• It boots by loading the bootloader (such as GRUB) which then loads the kernel into memory.

• The kernel initializes the system, mounts the root filesystem, and starts the init process.

• The init process then starts other system services and user programs.

• Linux can boot from different...read more

To boot a system, you need to power it on and load the operating system into memory.

• Power on the computer by pressing the power button

• The BIOS/UEFI firmware initializes hardware components

• The bootloader is loaded to start the operating system

• The operating system kernel is loaded into memory

• The system is now ready for use

To create and extend a LVM, use tools like lvcreate, lvextend, and resize2fs.

• Use lvcreate command to create a new logical volume

• Use lvextend command to extend an existing logical volume

• Use resize2fs command to resize the file system on the logical volume

• Ensure you have enough free space in the volume group before extending

Sorting algorithm is a process of arranging data in a particular order.

• Choose a sorting algorithm based on the data size and type

• Implement the chosen algorithm in the programming language of choice

• Test the algorithm with sample data to ensure correctness

• Analyze the time and space complexity of the algorithm

• Optimize the algorithm if necessary

Yes, issues faced while booting up include slow startup, error messages, and hardware failures.

• Slow startup can be caused by too many startup programs or a failing hard drive.

• Error messages may indicate software conflicts or corrupted system files.

• Hardware failures such as a faulty RAM or motherboard can prevent the system from booting up properly.

To create a partition, you can use disk management tools in operating systems like Windows or disk utility in macOS.

• In Windows, you can create a partition by opening Disk Management, right-clicking on the unallocated space, and selecting 'New Simple Volume'. Follow the wizard to set up the partition.

• In macOS, you can use Disk Utility to create a partition by selecting the drive, clicking on the 'Partition' tab, and then clicking the '+' button to add a new partition. Adjust t...read more

AI Ops focuses on managing and deploying artificial intelligence models, while ML Ops focuses on managing and deploying machine learning models.

• AI Ops involves managing and deploying artificial intelligence models, which may include deep learning, natural language processing, and computer vision.

• ML Ops involves managing and deploying machine learning models, which typically involve statistical algorithms and data analysis.

• AI Ops often requires more computational resources and...read more

A job shop is a type of manufacturing process where small batches of a variety of products are produced in a specific order.

• Job shops are characterized by their flexibility and ability to handle custom orders.

• They typically have a wide range of equipment and skilled workers to handle different types of products.

• Each job in a job shop is unique and requires specific instructions and setups.

• Examples of job shops include custom furniture makers, print shops, and machine shops.

Pandas can read various file formats including CSV, Excel, JSON, HTML, and SQL.

• Use pandas.read_csv() to read CSV files

• Use pandas.read_excel() to read Excel files

• Use pandas.read_json() to read JSON files

• Use pandas.read_html() to read HTML tables

• Use pandas.read_sql() to read SQL tables

• Specify the file path or URL as the argument

• Additional parameters can be used to customize the reading process

Process management is the act of planning, monitoring, and controlling the processes within an organization to achieve its goals.

• It involves identifying and defining processes

• Assigning responsibilities and resources to each process

• Monitoring and measuring the performance of each process

• Identifying areas for improvement and making necessary changes

• Examples include project management, supply chain management, and quality management

Lambda functions are anonymous functions that can be used to perform a single task or operation.

• Lambda functions are defined using the lambda keyword.

• They can take any number of arguments but can only have one expression.

• Lambda functions are often used as arguments for higher-order functions.

• Example: lambda x: x**2 defines a lambda function that squares its input.

• Example: sorted(my_list, key=lambda x: x[1]) sorts a list of tuples based on the second element of each tuple.

The boot process is the sequence of events that occur when a computer is turned on, leading to the operating system being loaded and ready for use.

• Power is turned on, triggering the BIOS to perform a Power-On Self Test (POST)

• BIOS checks hardware components and locates the boot device

• Boot loader is loaded from the boot device into memory

• Boot loader loads the operating system kernel into memory and hands over control to it

• Operating system initializes hardware, loads necessary d...read more