FarEye Sde1 Interview Questions and Answers

Assignment to develop a prototype

Q1. Face to face questions
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Q2. Java Question Technical & coding
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Q3. Mongodb & Mysql Question
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Will be given Requirement to write code for Restraunt. Based on that have write code for delivering orders by delivery boys.

Q1. OOPS Concepts, Java Basics, Collections, MultiThreading
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Q1. Shortest path sum with negative integers allowed in matrix. Path starts from top left to bottom right.
Ans. 
Use dynamic programming to find the shortest path sum with negative integers allowed in a matrix.
• Implement dynamic programming to store the minimum sum at each cell

• Consider negative integers when calculating the sum of the path

• Start from the top left cell and iterate through the matrix to find the shortest path sum
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Q1. Write spring code
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Spring code is used for building Java applications with ease and efficiency.
• Use @ComponentScan annotation to automatically detect and register Spring beans

• Use @Autowired annotation for dependency injection

• Use @RequestMapping annotation to map HTTP requests to specific handler methods
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Q2. Design pattern questions asked
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Q1. Angular18 updates`
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Q2. Angular Ivy features
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Q3. Dif between var, let, const
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var is function scoped, let is block scoped, const is block scoped and cannot be reassigned.
• var is function scoped, let is block scoped, const is block scoped and cannot be reassigned

• var can be redeclared and updated, let can be updated but not redeclared, const cannot be redeclared or updated

• Example: var x = 10; let y = 20; const z = 30;
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Q4. What is Closure
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Closure is a function that captures the variables from its surrounding scope, even after the surrounding function has finished executing.
• Closure allows a function to access and manipulate variables from its outer scope.

• It maintains a reference to its outer scope, even after the outer function has returned.

• Closure is commonly used in event handlers and callbacks.
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Q5. Dependency injection
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Q6. Rxjs operators used
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Rxjs operators are used for handling asynchronous operations in reactive programming.
• Map operator: transforms the items emitted by an Observable

• Filter operator: emits only those items from an Observable that pass a specified condition

• Merge operator: combines multiple Observables into one by merging their emissions

• SwitchMap operator: switches to a new Observable each time it is emitted

• DebounceTime operator: emits a valu...read more
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Q7. Change detection strategy in Angular
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Change detection strategy in Angular is a mechanism used to detect changes in the application state and update the view accordingly.
• Angular uses Zone.js for change detection by default

• Change detection can be triggered manually using ChangeDetectorRef

• Optimizing change detection using OnPush strategy
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Q1. Trapping rain drops
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Q2. Next highest number
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To find the next highest number, sort the numbers in ascending order and find the number immediately greater than the given number.
• Sort the numbers in ascending order

• Find the number immediately greater than the given number

• Return the next highest number
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Q1. Projects discussion
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Q2. Lld design question
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Q1. Tree question dsa
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Q2. Fibonacci sequence question
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Q1. How to optimize build in Angular?
Ans. 
Optimizing build in Angular involves reducing bundle size, enabling lazy loading, using AOT compilation, and leveraging tree shaking.
• Reduce bundle size by removing unused code and optimizing imports

• Enable lazy loading to load modules on demand instead of all at once

• Use Ahead-of-Time (AOT) compilation to pre-compile templates and reduce runtime overhead

• Leverage tree shaking to eliminate dead code and reduce bundle size
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