ZKTeco Biometrics Interview Questions, Process, and Tips

Q1. Explain Oops concepts?
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OOPs concepts refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail
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Q2. How we can handle exception in springboot?
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Exceptions in Spring Boot can be handled using @ExceptionHandler annotation, @ControllerAdvice annotation, and custom exception classes.
• Use @ExceptionHandler annotation to handle exceptions at the controller level.

• Use @ControllerAdvice annotation to handle exceptions globally across all controllers.

• Create custom exception classes by extending RuntimeException or Exception classes and use them to handle specific excepti...read more
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Q1. Explain Spring MVC?
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Spring MVC is a framework for building web applications in Java, based on the Model-View-Controller design pattern.
• Spring MVC provides a way to structure your web application using a Model-View-Controller architecture.

• It allows for easy integration with other Spring frameworks like Spring Boot and Spring Security.

• Controllers handle incoming requests, process them, and return a response.

• Views are responsible for renderi...read more
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Q1. Asked about your Ctc , why you are looking for change?
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Q1. Oops concept ,Interface ,wrapper class,
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Q2. Coding Round
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String related questions

Just 10 simple question

Q1. Nothing they just check you communication and based on resume can ask 1 or 2 questions.
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Q1. Here they can ask Linux
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Q1. Ip configure and its importance
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IP configuration is the process of setting up network settings for a device, such as assigning an IP address, subnet mask, and default gateway.
• IP configuration is essential for devices to communicate on a network.

• It involves assigning a unique IP address to each device to ensure proper communication.

• Subnet mask helps determine which part of the IP address is the network portion and which part is the host portion.

• Defaul...read more
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Q2. Code used in linux
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Linux uses various programming languages for coding, including C, C++, Python, Perl, and Shell scripting.
• C is commonly used for system programming in Linux

• C++ is used for developing applications and drivers

• Python is popular for scripting and automation tasks

• Perl is used for text processing and system administration

• Shell scripting (Bash) is used for writing scripts to automate tasks
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