Siemens Interview Questions, Process, and Tips

Test is about 1 hr and it contains 40 mcqs(both aptitude and coding)

Q1. Level order traversal of binary tree
Ans. 
Level order traversal of binary tree visits nodes level by level, from left to right.
• Use a queue to keep track of nodes at each level

• Start by pushing the root node into the queue

• While the queue is not empty, dequeue a node, visit it, and enqueue its children
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Q2. Question related to OOPS concepts
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Q1. What is circuit breakers
Ans. 
Circuit breakers are electrical switches designed to protect electrical circuits from damage caused by overload or short circuit.
• Circuit breakers automatically stop the flow of electricity when a fault is detected.

• They can be reset manually after tripping.

• Common types include thermal-magnetic, magnetic, and thermal circuit breakers.

• Examples include miniature circuit breakers (MCBs) and molded case circuit breakers (MCC
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Q2. What is difference contractor or relay
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Contractor is a device used to make or break an electrical circuit, while relay is an electromagnetic switch that opens or closes circuits.
• Contractor is typically used for high power applications, while relay is used for low power applications.

• Contractor is usually larger in size and can handle higher currents, while relay is smaller and handles lower currents.

• Contractors are commonly used in industrial settings for co...read more
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Q3. What is difference neutral or earthing
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Neutral is a current-carrying conductor that completes the circuit, while earthing is a safety measure to prevent electric shock.
• Neutral wire carries current back to the source in a circuit

• Earthing provides a path for fault currents to flow safely to the ground

• Neutral wire is typically connected to the center tap of a transformer

• Earthing is done by connecting metal parts of electrical equipment to the earth
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Q4. What is star or delta
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Star and delta are two types of connections used in electrical circuits.
• Star connection is a type of electrical connection where all the components are connected at a common point, forming a star shape.

• Delta connection is a type of electrical connection where the components are connected in a triangular shape, resembling the Greek letter delta.

• Star connection is commonly used in three-phase AC circuits, while delta con...read more
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Q5. What is use contractor
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A contractor is a person or company hired to perform work on a specific project or job.
• Contractors are hired to complete tasks that the hiring company may not have the expertise or resources to do themselves.

• Contractors can be hired for various projects such as construction, electrical work, plumbing, etc.

• Contractors are typically paid for their services based on a contract or agreement outlining the scope of work, tim
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Q1. Are you aware about process industry ?
Ans. 
Yes, process industry refers to industries that produce goods through a series of steps or processes.
• Process industry involves manufacturing products through a series of steps or processes.

• Examples include chemical plants, oil refineries, food processing plants, and pharmaceutical companies.

• Efficiency and optimization are key factors in process industry to ensure quality and cost-effectiveness.
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Q2. Tell me about design principles
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Design principles are fundamental concepts used to guide the software design process.
• Design principles help ensure that software is scalable, maintainable, and efficient.

• Examples of design principles include SOLID principles, DRY (Don't Repeat Yourself), KISS (Keep It Simple, Stupid), and YAGNI (You Aren't Gonna Need It).
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Q1. What is difference between Dependency Inversion & Dependency Injection ?
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Dependency Inversion is a design principle where high-level modules do not depend on low-level modules, but both depend on abstractions. Dependency Injection is a design pattern where the objects are passed their dependencies rather than creating them internally.
• Dependency Inversion: High-level modules depend on abstractions, not on low-level modules. Promotes decoupling and flexibility.

• Dependency Injection: Objects ar...read more
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Q2. How do you push the data from server to client
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Data can be pushed from server to client using technologies like WebSockets, Server-Sent Events, or HTTP long polling.
• Use WebSockets for real-time bidirectional communication between server and client.

• Server-Sent Events allow server to push data to client over a single, long-lived connection.

• HTTP long polling involves the client making repeated HTTP requests to the server, which holds the response until new data is ava
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Q1. Whast is Lan ?
Ans. 
LAN stands for Local Area Network. It is a network that connects computers and devices in a limited area such as a home, office, or school.
• LAN is used to share resources like printers, files, and internet connections within a limited area.

• LAN typically operates within a single building or a group of nearby buildings.

• Ethernet cables, Wi-Fi, and switches are commonly used in LAN setups.

• Examples of LAN include home networ
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Q2. OSI layers and some questions related to HSRP
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Q3. Wifi devices , routing and switching questions
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Q1. Simple intro questions
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