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I applied via Recruitment Consulltant and was interviewed before Apr 2023. There were 4 interview rounds.
Notification Observer Design Pattern is used to establish a one-to-many relationship between objects.
Create a subject class that maintains a list of observers and notifies them of any state changes.
Observers register themselves with the subject to receive notifications.
Use protocols and delegates in iOS to implement the observer pattern.
Example: NotificationCenter in iOS uses the observer pattern to broadcast notificat
I applied via Company Website and was interviewed before Jul 2022. There were 6 interview rounds.
This round contains live coding round on any online editor.
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I applied via Naukri.com and was interviewed in Aug 2021. There were 3 interview rounds.
Singleton is a design pattern that restricts the instantiation of a class to one object and provides a global point of access.
Singleton ensures that only one instance of a class is created and provides a way to access it globally.
It is thread-safe because the instance is created only once and accessed through a synchronized method or block.
Singleton can be implemented using different approaches such as eager initializa...
Object class is the base class of all classes in C#.
Object class provides basic functionalities like ToString(), GetHashCode(), and Equals() to all classes.
All classes in C# implicitly inherit from Object class.
Object class is defined in System namespace.
Example: class MyClass : Object { }
Access modifiers in C# control the visibility and accessibility of class members.
Public: accessible from anywhere
Private: accessible only within the class
Protected: accessible within the class and derived classes
Internal: accessible within the same assembly
Protected Internal: accessible within the same assembly and derived classes
Example: public int age; private string name;
Example: protected void DoSomething(); intern
Default access modifiers are public, protected, and private.
Public: accessible from anywhere
Protected: accessible within the class and its subclasses
Private: accessible only within the class
I applied via LinkedIn and was interviewed before Feb 2023. There was 1 interview round.
Components of a service include functionality, reliability, availability, and performance.
Functionality: The service should perform the intended tasks and meet the requirements.
Reliability: The service should consistently deliver the expected results.
Availability: The service should be accessible and operational when needed.
Performance: The service should perform efficiently and meet performance expectations.
The lifecycle of a web API refers to the stages it goes through from development to retirement.
The lifecycle typically includes stages like planning, development, testing, deployment, and retirement.
During planning, the requirements and design of the API are defined.
Development involves writing the code and implementing the functionality.
Testing ensures the API works as expected and meets the requirements.
Deployment in...
I applied via Company Website and was interviewed before May 2023. There were 2 interview rounds.
I appeared for an interview in Aug 2021.
Round duration - 60 minutes
Round difficulty - Medium
Technical Interview round with questions on C#, Design patterns, OOPS etc.
A base class is a class that is used as a starting point for creating other classes. It can be inherited by other classes.
Base class provides common attributes and methods that can be inherited by other classes
Derived classes can extend or override the functionality of the base class
Example: Animal can be a base class with attributes like name and methods like eat, sleep
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
Used to restrict the instantiation of a class to one object
Commonly used in logging, caching, thread pools, database connections
Implemented by creating a static instance of the class and a private constructor to prevent external instantiation
Access modifiers in C# control the visibility and accessibility of classes, methods, and other members.
Public - accessible from any other class or assembly
Private - accessible only within the same class
Protected - accessible within the same class or derived classes
Internal - accessible within the same assembly
Protected Internal - accessible within the same assembly or derived classes
The default access modifier in C# is 'private'.
Default access modifier is applied if no access modifier is specified for a class member
It restricts the access to the member within the same class
Example: private int myVariable = 10;
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Implement boolean canConstruct(String targetString, String[] dict) which returns true if we can construct the targetString by concatenating the words given in the dictionary
Implement a key value store for storing and retrieving data efficiently.
Use a hash table or a balanced tree data structure to store key-value pairs.
Implement functions for inserting, updating, deleting, and retrieving key-value pairs.
Consider implementing features like transactions, concurrency control, and data persistence.
Example: Implement a simple key value store using a hash table in Python.
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
I appeared for an interview before Jul 2023.
45 min round. Similar to Leetcode medium level question.
45 min coding round, 2 question asked
Design a system for proximity service
Utilize geolocation data to track user locations
Implement algorithms to calculate proximity between users
Use real-time updates to notify users of nearby contacts
posted on 19 Dec 2023
I applied via LinkedIn and was interviewed in Nov 2023. There were 2 interview rounds.
Create subarrays with sum = 0 from given array of integers.
Iterate through the array and keep track of the running sum.
Store the running sum in a hashmap and check if the current sum - any previous sum equals 0.
If yes, then the subarray between those two indices has a sum of 0.
The left view of a binary tree is the set of nodes visible when the tree is viewed from the left side.
Traverse the tree in a level order manner and keep track of the first node at each level.
Use a queue to store nodes at each level and update the left view nodes accordingly.
Example: For a binary tree with root node 1, left child 2, and right child 3, the left view would be [1, 2].
Some of the top questions asked at the Grab Greco Senior Software Engineer interview -
based on 2 interviews
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