CESC Software Engineer Interview Questions and Answers

Q1. What is the 164 notification
Ans. 
The 164 notification is a notification sent by a system to alert users of a specific event or action.
• The 164 notification typically includes important information or updates that users need to be aware of.

• It can be triggered by various events such as system errors, completed tasks, or new messages.

• Users may receive the 164 notification through email, text message, or within the system itself.
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Q2. What is the use of winch machine
Ans. 
A winch machine is used for lifting or pulling heavy objects using a motor-driven cable or rope.
• Used in construction for lifting heavy materials

• Commonly used in off-road vehicles for recovery purposes

• Found on boats for raising and lowering anchors

• Can be used in forestry for dragging logs
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Gate 2017 test for appti. bsnsn

Q1. What is your r strength
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Q2. How do you read newspapers
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Basic math and quantitative aptitude related questions

Q1. Tell me about thecompany
Ans. 
The company is a leading technology firm specializing in software development and engineering solutions.
• Founded in 2005 by a group of software engineers

• Provides services in web development, mobile app development, and cloud computing

• Clients include Fortune 500 companies such as Google and Microsoft
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Q2. How will you solve a critical problem coming to you as a engineer
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Online Aptitude test with GK, quant and domain knowledge

Q1. Explain how transformer functions
Ans. 
A transformer functions by transferring electrical energy between two or more circuits through electromagnetic induction.
• Transformers consist of two coils of wire, known as the primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy between the two cir...read more
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Q2. Why core company?
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Q1. Common way of demolition
Ans. 
Common way of demolition is through controlled implosion.
• Controlled implosion is a method where explosives are strategically placed to bring down a structure in a controlled manner.

• Another common method is mechanical demolition using equipment like wrecking balls, excavators, or bulldozers.

• Selective demolition involves dismantling specific parts of a structure while leaving the rest intact.

• Deconstruction is a sustainab...read more
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Q2. Vibration time of concrete
Ans. 
Vibration time of concrete is the duration for which concrete is vibrated to remove air bubbles and ensure proper compaction.
• Vibration time varies based on factors like mix design, slump, size of pour, and type of vibrator used.

• Typically, vibration time ranges from 10-30 seconds per foot of concrete thickness.

• Over-vibration can lead to segregation of aggregates, while under-vibration can result in honeycombing.

• Proper v...read more
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Q1. What is node js?
Ans. 
Node.js is a runtime environment that allows you to run JavaScript code outside of a web browser.
• Node.js is built on Chrome's V8 JavaScript engine.

• It uses an event-driven, non-blocking I/O model.

• Node.js is commonly used for building server-side applications.

• It has a large ecosystem of open-source libraries and frameworks like Express.js.
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Q2. What is event loop?
Ans. 
Event loop is a mechanism that allows a program to efficiently handle multiple events or tasks concurrently.
• Event loop is commonly used in asynchronous programming to manage tasks that may take varying amounts of time to complete.

• It continuously checks for events or tasks in a queue and executes them one by one.

• Event loop helps prevent blocking of the main thread by allowing non-blocking execution of tasks.

• Popular exam...read more
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Q3. Difference between callback and promise?
Ans. 
Callback is a function passed as an argument to another function to be executed later, while a promise is an object representing the eventual completion or failure of an asynchronous operation.
• Callback is used in traditional asynchronous programming, while promises are used in modern asynchronous programming.

• Callbacks can lead to callback hell or pyramid of doom, while promises provide better readability and error hand...read more
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Q4. What is middlewares in node js?
Ans. 
Middlewares in Node.js are functions that have access to the request and response objects, and can modify or terminate the request-response cycle.
• Middlewares are functions that are executed in the middle of the request-response cycle.

• They can perform tasks like parsing request data, logging, authentication, etc.

• Middlewares can be added using app.use() method in Express framework.

• Example: app.use(bodyParser.json()) to p
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Q5. What is event emitter?
Ans. 
Event emitter is a pattern used to handle and respond to events in software development.
• Event emitter is a design pattern commonly used in Node.js for handling events.

• It allows objects to subscribe to events and be notified when those events occur.

• Event emitter is often used for asynchronous programming and decoupling components.

• Example: EventEmitter class in Node.js can be used to create custom events and handle them.
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