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10+ Kiswok Industries Interview Questions and Answers

Updated 6 Jun 2024

Q1. What is solid principle and describe the use Liskov principles

Ans.

SOLID principles are design principles for software development. Liskov principle ensures substitutability of objects.

  • SOLID principles are a set of five design principles that help in creating maintainable and scalable software.

  • Liskov principle, named after Barbara Liskov, states that objects of a superclass should be replaceable with objects of its subclasses without affecting the correctness of the program.

  • It ensures that the behavior of the superclass is preserved in its s...read more

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Q2. How do you use dependecy injection? What are advantages?

Ans.

Dependency injection is a design pattern used to remove hard-coded dependencies and make code more modular and testable.

  • Dependency injection is achieved by passing dependencies to a class or method through its constructor or method parameters.

  • Advantages include increased modularity, easier testing, and reduced coupling between components.

  • Examples of dependency injection frameworks include Spring and Guice for Java, and Angular for JavaScript.

  • Dependency injection can also be d...read more

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Q3. What is view? How to optimize SP?

Ans.

View is a virtual table that displays data from one or more tables. SP optimization can be done by reducing the number of joins and using proper indexing.

  • View is a read-only table that is created by a query

  • It can be used to simplify complex queries

  • SP optimization can be done by reducing the number of joins

  • Using proper indexing can also improve performance

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Q4. Explain Complete Framework used in your organisation

Ans.

Our organization uses a comprehensive framework that includes multiple technologies and tools for software development.

  • Our framework includes front-end technologies like React and Angular for building user interfaces.

  • For back-end development, we use Node.js and Spring Boot to create robust server-side applications.

  • We also utilize databases such as MySQL and MongoDB for data storage and retrieval.

  • Continuous integration and deployment are managed through tools like Jenkins and ...read more

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Q5. What is constructor and different types.

Ans.

Constructor is a special method used to initialize objects. There are default, parameterized and copy constructors.

  • Default constructor is used to create an object with default values.

  • Parameterized constructor is used to create an object with user-defined values.

  • Copy constructor is used to create a new object as a copy of an existing object.

  • Constructors can be overloaded to have multiple constructors with different parameters.

  • Constructors do not have a return type and have the...read more

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Q6. What are different types of storage environments

Ans.

Different types of storage environments include cloud storage, on-premises storage, and hybrid storage solutions.

  • Cloud storage: Data is stored on remote servers accessed over the internet, providing scalability and flexibility. Example: Amazon S3, Google Cloud Storage

  • On-premises storage: Data is stored locally on physical servers within an organization's premises, offering control and security. Example: NAS devices, SAN storage

  • Hybrid storage solutions: Combination of cloud an...read more

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Q7. Write a program to merge two arrays.

Ans.

Program to merge two arrays of strings.

  • Create a new array with size equal to sum of sizes of both arrays.

  • Copy elements of first array to new array.

  • Copy elements of second array to new array starting from the end of first array.

  • Return the new array.

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Q8. Explain inheritance, polymorphism with example

Ans.

Inheritance is a way to create a new class from an existing class. Polymorphism allows objects of different classes to be treated as if they were of the same class.

  • Inheritance allows a subclass to inherit properties and methods from a superclass.

  • Polymorphism allows objects of different classes to be treated as if they were of the same class.

  • Example of inheritance: class Car extends Vehicle. Car inherits properties and methods from Vehicle.

  • Example of polymorphism: class Animal...read more

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Q9. What is raid and explain raid levels

Ans.

RAID stands for Redundant Array of Independent Disks. It is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both.

  • RAID 0: Striping without parity, offers increased performance but no fault tolerance.

  • RAID 1: Mirroring, offers fault tolerance by duplicating data on two or more drives.

  • RAID 5: Striping with distributed parity, offers a bala...read more

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Q10. Typecasting and downcasting in java.

Ans.

Typecasting is converting one data type to another. Downcasting is casting a superclass to a subclass.

  • Typecasting is done using (datatype) variable syntax.

  • Downcasting requires explicit casting using subclass type.

  • Typecasting can result in loss of data or precision.

  • Downcasting can result in ClassCastException if the object is not an instance of the subclass.

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Q11. Whatis abstract methods

Ans.

Abstract methods are methods that are declared in a class but do not have an implementation.

  • Abstract methods are used to define a common interface for a group of subclasses.

  • They are declared using the 'abstract' keyword and do not have a body.

  • Subclasses must provide an implementation for all abstract methods.

  • Abstract classes can have both abstract and non-abstract methods.

  • Abstract methods cannot be instantiated and can only be used through inheritance.

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Q12. What is c? What is c++?

Ans.

C and C++ are programming languages used for system and application software development.

  • C is a procedural programming language developed by Dennis Ritchie in 1972.

  • C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

  • C is used for developing system software, device drivers, and embedded systems.

  • C++ is used for developing application software, games, and operating systems.

  • C++ is an extension of C with additional features like classes, inheritan...read more

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