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posted on 16 Apr 2021
I applied via Approached by Company and was interviewed before Aug 2021. There was 1 interview round.
Abstract class can have implementation while interface cannot. Classes can implement multiple interfaces but only one abstract class.
Abstract class can have constructors while interface cannot.
Abstract class can have non-abstract methods while interface cannot.
Interfaces are used for full abstraction while abstract classes are used for partial abstraction.
Example: Abstract class - Animal with method eat() and subclass ...
I applied via Naukri.com and was interviewed in Jan 2021. There were 3 interview rounds.
I applied via Company Website and was interviewed in Dec 2020. There was 1 interview round.
posted on 13 Aug 2021
Serialize a tree data structure
Use pre-order traversal to serialize the tree
Store null values as a special character
Use a delimiter to separate nodes
Example: 1,2,null,null,3,4,null,null,5,null,null
Deserialize by splitting the string and using a queue
I applied via Recruitment Consulltant and was interviewed before Oct 2021. There were 4 interview rounds.
I applied via Campus Placement and was interviewed before Dec 2021. There were 2 interview rounds.
Basic Aptitude like Quantitative , English and Logical Reasoning. Coding round had 4 questions - 2 SQL problems and 2 codes
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