L2 Engineer
40+ L2 Engineer Interview Questions and Answers
Q1. 4. What is difference between radiography testing (RT) and ultrasonic testing (UT)
Radiography testing (RT) and ultrasonic testing (UT) are both non-destructive testing methods used to detect flaws in materials.
Radiography testing uses X-rays or gamma rays to create an image of the internal structure of an object, while ultrasonic testing uses high-frequency sound waves.
RT is typically used for thicker materials and can detect both surface and subsurface defects, while UT is more commonly used for thinner materials and can only detect surface defects.
RT pro...read more
Q2. What are the design patterns that you know about
Design patterns are reusable solutions to common software problems.
Creational patterns: Singleton, Factory, Abstract Factory, Builder
Structural patterns: Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy
Behavioral patterns: Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor
L2 Engineer Interview Questions and Answers for Freshers
Q3. 7. What is essential variables and non-essential variables ?
Essential variables are crucial for the functioning of a system, while non-essential variables are not necessary but may provide additional information.
Essential variables are required for the system to operate correctly.
Non-essential variables are not necessary for the system's basic functionality.
Essential variables are typically directly related to the core purpose of the system.
Non-essential variables may provide supplementary data or enhance the system's performance.
For ...read more
Q4. Write sample classes spring boot … entity service and controller layers with proper annotations
Sample classes for Spring Boot entity, service, and controller layers with annotations
Create entity classes with @Entity and @Id annotations
Create service classes with @Service annotation and inject repository classes with @Autowired annotation
Create controller classes with @RestController and @RequestMapping annotations
Use @GetMapping, @PostMapping, @PutMapping, and @DeleteMapping annotations for HTTP methods
Use @RequestBody and @PathVariable annotations for request paramete...read more
Q5. 2. Do you know about MRB (Manufacturing record book)?
Yes, MRB (Manufacturing Record Book) is a document that contains detailed information about the manufacturing process.
MRB is a comprehensive record of all activities related to manufacturing, including design, production, testing, and quality control.
It serves as a reference for future production runs and helps ensure consistency and quality.
MRB typically includes information such as engineering drawings, specifications, inspection reports, test results, and certifications.
It...read more
Q6. Internal implementation of hash map and use comparator
Hash map is an internal data structure that maps keys to values. Comparator is used to compare objects for sorting.
Hash map uses a hash function to map keys to indices in an array
Comparator is used to compare objects for sorting in collections like TreeSet or TreeMap
Example of hash map implementation in Java: HashMap
Example of using a comparator in Java: Collections.sort(list, comparator)
Share interview questions and help millions of jobseekers 🌟
Q7. Can you explain a concept from your studies in chemical process engineering and how it applies to real-world applications?
One concept from my studies in chemical process engineering is mass transfer, which involves the movement of materials from one phase to another.
Mass transfer is crucial in industries such as pharmaceuticals, food processing, and environmental engineering.
Examples include the extraction of essential oils from plants using steam distillation, the separation of components in a chemical reaction using a distillation column, and the removal of pollutants from wastewater through a...read more
Q8. Where do you used the concepts of OOPs in your project, please explain with examples?
OOPs concepts are used in my project for creating reusable and modular code.
I use inheritance to create a base class for common functionalities and then derive specific classes from it.
Encapsulation is used to hide the internal implementation details of a class and only expose necessary methods and properties.
Polymorphism allows me to use a single interface to represent different data types or objects.
Abstraction helps in defining the structure of classes without specifying t...read more
L2 Engineer Jobs
Q9. 5. Is RT can replace with UT examination ?
No, RT cannot replace UT examination.
RT (Radiographic Testing) and UT (Ultrasonic Testing) are two different non-destructive testing methods used in engineering.
RT uses X-rays or gamma rays to inspect the internal structure of an object, while UT uses sound waves to detect flaws or measure thickness.
Each method has its own advantages and limitations, and they are often used in combination to ensure comprehensive inspection.
For example, RT is effective for detecting internal d...read more
Q10. How do you slect which type of bearing is required for your machine drive?
The type of bearing required for a machine drive is selected based on factors such as load, speed, lubrication, and operating conditions.
Consider the load and speed requirements of the machine drive
Choose between ball bearings, roller bearings, or plain bearings based on the application
Take into account the lubrication method and maintenance requirements
Consider the operating conditions such as temperature, vibration, and alignment
Q11. Did you managed a CI/CD pipeline in your project?If yes, then what challenges did you faced?
Yes, I managed a CI/CD pipeline in my project.
Setting up automated testing was a challenge due to compatibility issues.
Integrating different tools and technologies caused some delays.
Ensuring smooth deployment across multiple environments required careful planning.
Q12. 6. What is WPS & PQR?
WPS stands for Welding Procedure Specification and PQR stands for Procedure Qualification Record.
WPS is a document that provides detailed instructions on how to perform a specific welding procedure.
It includes information on welding parameters, materials, pre-weld and post-weld treatments, etc.
PQR is a record that documents the actual results of a welding procedure qualification test.
It includes details of the test, such as the welding process used, materials, test results, e...read more
Q13. What are major and minor breakdown attended and described the solutions
Major breakdowns include server crashes, while minor breakdowns may involve software glitches.
Major breakdown: Server crash - Solution: Restart server and investigate root cause
Minor breakdown: Software glitch - Solution: Update software or restart application
Major breakdown: Network failure - Solution: Check network connections and troubleshoot
Minor breakdown: Printer jam - Solution: Clear jammed paper and reset printer
Q14. How do you prioritize safety in chemical process design and operation?
Safety in chemical process design and operation is prioritized through thorough risk assessments, implementing safety protocols, providing proper training, and continuous monitoring.
Conducting thorough risk assessments to identify potential hazards and risks in the chemical process
Implementing safety protocols and procedures to mitigate risks and prevent accidents
Providing proper training to all personnel involved in the process to ensure they are aware of safety measures and...read more
Q15. How can you manage the line output during the line down
During a line down situation, managing line output involves troubleshooting, identifying the root cause, implementing solutions, and communicating with stakeholders.
Quickly troubleshoot to identify the root cause of the line down
Implement temporary solutions to restore line output if possible
Communicate with relevant teams and stakeholders to keep them informed
Work on permanent solutions to prevent future line down situations
Document the incident and steps taken for future re...read more
Q16. Which software are used in the the fttx design
Software used in FTTx design
AutoCAD for creating network diagrams
Geographic Information System (GIS) for mapping
Optical Network Design and Planning (ONDAP) for fiber optic network planning
FiberPlanIT for designing and optimizing FTTx networks
Google Earth for visualizing network routes
Bentley Fiber for designing and documenting fiber networks
Q17. Why current flow direction is opposite to the electron flow
The direction of current flow is opposite to the direction of electron flow due to historical convention.
The concept of current flow was developed before the discovery of electrons.
Benjamin Franklin proposed the convention of positive charge carriers, which led to the opposite direction of current flow.
In reality, electrons are negatively charged and flow from the negative terminal to the positive terminal of a power source.
However, the convention of current flow from positiv...read more
Q18. 3. Do you know about QAP/ITP?
Yes, QAP/ITP stands for Quality Assurance Plan/Inspection and Test Plan.
QAP/ITP is a document that outlines the quality assurance and inspection procedures for a project or product.
It includes details about the tests to be conducted, acceptance criteria, and responsibilities of different stakeholders.
QAP/ITP ensures that the project or product meets the required quality standards and specifications.
For example, in construction projects, a QAP/ITP may specify the tests to be p...read more
Q19. 1. How can you handle wastege of material in site 2. Concrete tempreture test
To handle waste material on site, proper planning, monitoring, and training of staff are essential. Concrete temperature tests are conducted to ensure the quality and strength of the concrete.
Implement a waste management plan to track and minimize material wastage on site
Train staff on proper handling and storage of materials to prevent wastage
Regularly monitor material usage and wastage to identify areas for improvement
Reuse or recycle materials whenever possible to reduce w...read more
Q20. What is STP and its working, Routing protocols like OSPF, BGP. Knowledge of TCP/UDP
STP is a network protocol that prevents loops in Ethernet networks. OSPF and BGP are routing protocols used to exchange routing information.
STP (Spanning Tree Protocol) is used to prevent loops in Ethernet networks by creating a loop-free logical topology.
STP works by electing a root bridge and calculating the shortest path to the root bridge for each network segment.
OSPF (Open Shortest Path First) is an interior gateway protocol used for routing within an autonomous system.
O...read more
Q21. Can we delete the primary key?
No, primary keys should not be deleted as they uniquely identify each record in a database.
Primary keys are essential for maintaining data integrity and ensuring uniqueness of records.
Deleting a primary key can lead to data inconsistencies and errors in the database.
If a primary key needs to be changed, it is better to update it rather than delete it.
Q22. How many Test Case you used to automate?
I have automated approximately 500 test cases.
I have automated test cases for critical functionalities to ensure robustness.
I have automated regression test cases to save time and effort during testing.
I have automated boundary test cases to ensure the system handles extreme scenarios.
I have automated negative test cases to validate error handling.
I have automated performance test cases to assess system response under load.
Example: Automated login test cases, data validation ...read more
Q23. Difference and least count of various measuring instrument
Difference and least count of measuring instruments
Difference: Range of values that can be measured by the instrument
Least count: Smallest change in the quantity being measured that can be detected by the instrument
Examples: Vernier caliper - Difference: 0-150mm, Least count: 0.02mm; Micrometer screw gauge - Difference: 0-25mm, Least count: 0.01mm
Q24. Mapping for areas like temperature controlled rooms
Mapping temperature controlled rooms involves creating a visual representation of temperature distribution within the space.
Use sensors to collect temperature data at various points in the room
Create a map or diagram showing temperature gradients and hot/cold spots
Implement HVAC systems to regulate temperature based on mapping results
Q25. You do you check teh quality of mesh in FEM
Quality of mesh in FEM is checked by examining element shapes, aspect ratios, and convergence of results.
Check element shapes to ensure they are not distorted or skewed
Evaluate aspect ratios to ensure they are within acceptable limits
Verify convergence of results by refining the mesh and comparing results
Q26. Difference between Windows 7 & 10
Windows 7 and 10 are different versions of the Windows operating system.
Windows 10 has a more modern and user-friendly interface compared to Windows 7.
Windows 10 has better performance and improved security features.
Windows 10 has a virtual assistant called Cortana, which is not available in Windows 7.
Windows 10 supports newer hardware and technologies that Windows 7 may not.
Windows 10 receives regular updates and support from Microsoft, while Windows 7 has reached its end of...read more
Q27. What are the differnet mosfet terminals
The different terminals of a MOSFET are the gate, source, and drain.
The gate terminal controls the flow of current between the source and drain.
The source terminal is where the current enters the MOSFET.
The drain terminal is where the current exits the MOSFET.
The gate-source voltage determines the conductivity of the channel between the source and drain.
Examples of MOSFETs include enhancement-mode and depletion-mode MOSFETs.
Q28. What is leakage current in cmos
Leakage current in CMOS refers to the small amount of current that flows through the transistors when they are in the off state.
Leakage current occurs due to the imperfect insulation between the source and drain terminals of the transistors.
It is an undesirable phenomenon as it leads to power dissipation and can affect the performance and reliability of CMOS circuits.
Leakage current can be categorized into subthreshold leakage, gate leakage, and junction leakage.
Subthreshold ...read more
Q29. Difference between drop and delete?
Drop means to remove a database object, while delete means to remove data from a table.
Drop is used to remove an entire database object like a table, view, or database itself.
Delete is used to remove specific rows of data from a table.
Drop operation is irreversible and can lead to loss of data, while delete operation can be rolled back if within a transaction.
Example: DROP TABLE employees; DELETE FROM employees WHERE age > 50;
Q30. Erection sequence of boiler and esp
The erection sequence of a boiler and ESP involves several steps to ensure proper installation and functioning.
The foundation for the boiler and ESP must be prepared and laid out.
The boiler and ESP components are then assembled and installed on the foundation.
The piping and ductwork are connected to the boiler and ESP.
The electrical and control systems are installed and connected.
The boiler and ESP are tested and commissioned to ensure proper functioning.
The final step involv...read more
Q31. Difference between interface and abstract
Interface defines a contract while abstract class provides partial implementation.
Interface only contains method signatures while abstract class can have both abstract and non-abstract methods.
A class can implement multiple interfaces but can only inherit from one abstract class.
Interfaces are used for achieving multiple inheritance while abstract classes are used for code reusability.
An interface cannot have a constructor while an abstract class can have one.
An interface can...read more
Q32. What are triggers?
Triggers are special stored procedures in databases that are automatically executed or fired when certain events occur.
Triggers are used to maintain data integrity by enforcing business rules or automating actions.
They can be set to execute before or after an INSERT, UPDATE, or DELETE operation on a table.
Examples of triggers include auditing changes to a table, updating a related table when a record is inserted, or enforcing constraints.
Q33. Types of pneumatics n hydralics systems
Pneumatics and hydraulics systems are used in engineering for power transmission and control.
Pneumatics systems use compressed air to transmit power, commonly used in industries for automation and control.
Hydraulics systems use pressurized liquid (usually oil) to transmit power, commonly used in heavy machinery like excavators and hydraulic presses.
Pneumatics systems are generally faster but less powerful than hydraulics systems.
Hydraulics systems are more precise and can han...read more
Q34. Experience in telecom industry.
I have 5 years of experience in the telecom industry.
Worked as a network engineer for a major telecom company
Managed and maintained network infrastructure
Implemented new technologies such as 5G and VoLTE
Troubleshot and resolved network issues
Collaborated with cross-functional teams to ensure smooth operations
Q35. Design Book Management System
A Book Management System to organize and track books in a library or personal collection.
Create a database to store book information such as title, author, genre, and availability status.
Implement a user interface for users to search, borrow, return, and add new books.
Include features like book recommendations, reviews, and notifications for due dates.
Utilize barcode scanning or ISBN lookup for easy book entry and tracking.
Q36. Diff between MTTR and MTBF?
MTTR is the average time to repair a failed system, while MTBF is the average time between failures.
MTTR measures downtime and repair time, while MTBF measures reliability and uptime.
MTTR is a measure of maintainability, while MTBF is a measure of reliability.
MTTR is calculated as total downtime divided by number of failures, while MTBF is calculated as total uptime divided by number of failures.
For example, if a system has an MTBF of 1000 hours and an MTTR of 2 hours, it mea...read more
Q37. Different between IPV4 and IPV6
IPv4 uses 32-bit addresses while IPv6 uses 128-bit addresses.
IPv4 addresses are written in decimal format (e.g. 192.168.1.1) while IPv6 addresses are written in hexadecimal format (e.g. 2001:0db8:85a3:0000:0000:8a2e:0370:7334).
IPv4 supports around 4.3 billion unique addresses, while IPv6 supports an astronomical number of unique addresses (2^128).
IPv4 uses ARP (Address Resolution Protocol) for mapping IP addresses to MAC addresses, while IPv6 uses NDP (Neighbor Discovery Prot...read more
Q38. What is a mpls
MPLS stands for Multiprotocol Label Switching, a technique used in telecommunications networks to direct data packets along predefined paths.
MPLS is a protocol used to speed up and shape network traffic.
It operates at layer 2.5 of the OSI model, between traditional layer 2 (Data Link Layer) and layer 3 (Network Layer).
MPLS uses labels to make forwarding decisions, allowing for faster and more efficient routing.
It is commonly used by service providers to offer quality of servi...read more
Q39. What is about ip
IP stands for Internet Protocol, a set of rules governing the format of data sent over the internet.
IP addresses are unique identifiers assigned to devices connected to a network.
There are two versions of IP - IPv4 and IPv6.
IP packets contain information such as source and destination addresses, as well as data payload.
IP routing is the process of forwarding packets from one network to another.
Subnetting allows for the division of IP networks into smaller subnetworks.
Q40. What is osi layers
OSI layers refer to the seven layers in the OSI model that define the functions of a network protocol stack.
The OSI (Open Systems Interconnection) model is a conceptual framework used to understand how different networking protocols interact.
There are seven layers in the OSI model, each with its own specific functions and responsibilities.
The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer communicates with the layers abo...read more
Q41. What is an inductor
An inductor is a passive electronic component that stores energy in a magnetic field when current flows through it.
Inductors are typically made of a coil of wire wound around a core material.
They are used in electronic circuits to control the flow of current and store energy.
Inductors can be found in various applications such as power supplies, filters, and oscillators.
They are measured in units called henries (H).
Inductors oppose changes in current and can cause delays or ph...read more
Q42. What is ohms law
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance.
Ohm's law is expressed as V = IR, where V is the voltage, I is the current, and R is the resistance.
It helps in understanding the relationship between voltage, current, and resistance in an electrical circuit.
For example, if the voltage across a resistor is increased, the current flowing through it will also incre...read more
Q43. Manual testing of test
Manual testing of test involves executing test cases without the use of automation tools.
Manual testing is done by human testers without the use of automation tools.
Test cases are executed step by step to ensure the software functions as expected.
Manual testing is time-consuming but can uncover user experience issues that automated tests may miss.
Q44. Speed and feed formula
Speed and feed formula is used in machining to determine the optimal cutting parameters for a specific material and tool.
Speed and feed formula calculates the spindle speed (RPM) and feed rate (IPM) for a given material and tool combination.
The formula takes into account factors such as material type, tool diameter, and desired surface finish.
For example, the formula for calculating spindle speed is: RPM = (CS x 4) / D, where CS is cutting speed and D is tool diameter.
Q45. Temperature mapping for areas
Temperature mapping involves monitoring and recording temperatures in different areas to ensure proper temperature control.
Use temperature sensors to collect data
Create a map of the area with temperature readings
Analyze the data to identify any temperature variations
Implement measures to regulate temperature if needed
Q46. LINQ in C#?
LINQ (Language Integrated Query) is a feature in C# that allows for querying data from different data sources using a SQL-like syntax.
LINQ allows for querying data from collections, databases, XML, and more.
It provides a set of standard query operators like Where, Select, OrderBy, GroupBy, etc.
LINQ queries are written in a declarative syntax, making code more readable and maintainable.
Example: var result = from num in numbers where num % 2 == 0 select num;
Q47. Hvac system full details
An HVAC system is a heating, ventilation, and air conditioning system that controls the temperature, humidity, and air quality in a building.
Consists of a furnace or boiler for heating
Includes a central air conditioner for cooling
Utilizes ductwork to distribute air throughout the building
May have a thermostat to control temperature settings
Can include air filters for improving indoor air quality
Q48. Threads using java8
Java 8 introduced new features for working with threads, such as CompletableFuture and parallel streams.
Java 8 introduced CompletableFuture class for asynchronous programming.
Parallel streams in Java 8 allow for easy parallelization of operations on collections.
New methods like `join()` and `thenApply()` were added to the Thread class in Java 8.
Q49. Interest in output
Interest in output refers to the level of curiosity and enthusiasm a person has towards the end result or outcome of a project or task.
Interest in output can drive motivation and productivity in completing tasks.
It involves being invested in the final outcome and taking pride in the results.
Individuals with high interest in output are more likely to pay attention to details and strive for excellence.
Example: A software engineer who is passionate about creating user-friendly i...read more
Interview experiences of popular companies
Calculate your in-hand salary
Confused about how your in-hand salary is calculated? Enter your annual salary (CTC) and get your in-hand salary
Reviews
Interviews
Salaries
Users/Month