Meesho Software Development Engineer 1 Interview Questions and Answers

2 standard DSA question for 1 hour time

1 hr coding text on hackerearth

Q1. Cannot disclose
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Q1. Cannot disclose
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Q1. LRU Cache - how to tackle
Ans. 
LRU Cache is a data structure that maintains a list of items in order of most recently used to least recently used.
• Implement using a doubly linked list and a hashmap for efficient operations

• When an item is accessed, move it to the front of the list

• When the cache is full, remove the least recently used item from the end of the list
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Q2. LRU Cache implementation based on a real time system. How would the main work which will be called etc etc
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Easy level to Medium level

2 Easy questions of DSA

Q1. One DSA question
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Q2. Normal discussion about tech stack
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Q1. Tell about yourself
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Q2. Why do you want to join digit?
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Easy to medium questions, Questions on DSA and Node.js.

Q1. Valid parenthesis
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Q2. Three sum problem
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Q1. Machine coding on Order Management System
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Q2. Java related advance questions
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Q1. Healthy discussion on designing a system
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Q2. Managerial questions
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Q1. Scenario based questions like How did you handle a situation where your colleague was unresponsive on something
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Q2. Scenario based questions like What were the positive and constructive feedbacks you got from your manager
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Q1. The question was about Nodejs
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Q2. The question was to build a linked list in Nodejs
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Q1. The first question was related to DSA
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Q2. The question was related to SQL
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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
Ans. 
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
Ans. 
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
Ans. 
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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