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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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posted on 31 Oct 2023
I applied via LinkedIn and was interviewed in Oct 2023. There were 2 interview rounds.
posted on 8 Feb 2024
I applied via Recruitment Consulltant and was interviewed before Feb 2023. There were 2 interview rounds.
posted on 17 Mar 2024
I applied via Naukri.com and was interviewed before Mar 2023. There were 2 interview rounds.
posted on 25 Apr 2024
I applied via LinkedIn and was interviewed before Apr 2023. There was 1 interview round.
Find lowest and highest number in an array efficiently
Use a loop to iterate through the array and keep track of the lowest and highest numbers
Initialize variables for lowest and highest numbers with the first element of the array
Compare each element with the current lowest and highest numbers and update accordingly
I applied via Referral and was interviewed before Sep 2020. There were 3 interview rounds.
I applied via Referral and was interviewed before Oct 2021. There were 3 interview rounds.
Siemens plc models include S7-1200, S7-1500, S7-300, S7-400, and LOGO!
S7-1200
S7-1500
S7-300
S7-400
LOGO!
SPC stands for Statistical Process Control, a method used to monitor and control processes to ensure they are operating efficiently and within specifications.
SPC involves collecting and analyzing data to identify variations in a process
It helps in detecting and correcting issues before they result in defects
Common tools used in SPC include control charts, histograms, and Pareto charts
To configure a dp dp coupler, set the parameters for communication protocol, baud rate, address, and data format.
Set the communication protocol to match the devices being connected.
Configure the baud rate to ensure proper data transmission speed.
Assign a unique address to the dp dp coupler for identification.
Choose the appropriate data format for the connected devices.
Test the configuration to ensure proper communicati
I applied via Job Portal
I applied via Job Portal and was interviewed in Mar 2022. There were 4 interview rounds.
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