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Basic OS, DBMS, Networking questions and aptitude
Easy medium Strings and Arrays related questions
Bug cycle is the process of identifying, reporting, tracking, and resolving software defects.
Bug is identified by testers during testing phase
Bug is reported to the development team
Development team reproduces the bug
Bug is assigned to a developer for fixing
Developer fixes the bug and sends it back to the testing team
Testing team verifies the fix and closes the bug
SDLC cycle is a process followed by software development teams to design, develop, test, and deploy high-quality software.
SDLC stands for Software Development Life Cycle
It consists of several phases such as planning, analysis, design, implementation, testing, and maintenance
Each phase has its own set of activities and deliverables
The goal of SDLC is to ensure that the software meets the customer's requirements and is o...
Wabtec interview questions for popular designations
Hashmap is a data structure that stores key-value pairs and uses hashing to map keys to their corresponding values.
Hashmap uses an array to store the key-value pairs
A hash function is used to map the key to an index in the array
Collisions can occur when two keys map to the same index, which can be resolved using techniques like chaining or open addressing
Hashmap provides constant time complexity for insertion, deletion
The @Autowired annotation is the most useful annotation used in Spring Boot and Spring JPA.
The @Autowired annotation is used for automatic dependency injection.
It eliminates the need for manual wiring of beans.
It can be used with constructors, fields, and methods.
Example: @Autowired private UserRepository userRepository;
Singleton and Factory patterns are creational patterns used in Java to create objects.
Singleton pattern ensures that only one instance of a class is created and provides a global point of access to it.
Factory pattern provides an interface for creating objects, but allows subclasses to decide which class to instantiate.
Singleton pattern can be implemented using private constructor, static method and static variable.
Fact...
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I applied via Company Website and was interviewed before Apr 2022. There were 4 interview rounds.
I applied via Walk-in and was interviewed in Jan 2022. There were 2 interview rounds.
I applied via Recruitment Consulltant and was interviewed before Apr 2022. There were 2 interview rounds.
I applied via Recruitment Consulltant and was interviewed in Sep 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed in Nov 2020. There were 4 interview rounds.
An alternator is a device that converts mechanical energy into electrical energy through electromagnetic induction.
Alternator works on the principle of Faraday's law of electromagnetic induction
It consists of a rotor, stator, and diode rectifier
The rotor rotates inside the stator, which contains a set of stationary coils
As the rotor spins, it creates a magnetic field that induces an alternating current (AC) in the stat...
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