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10+ St. Marys Convent School Interview Questions and Answers

Updated 16 Mar 2024
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Q1. OOPs features, what is a carriage return, the syntax for making a 2D matrix, what is nested loop incase of the switch statement

Ans.

Questions on OOPs features, carriage return, 2D matrix syntax, and nested loops in switch statement.

  • OOPs features include encapsulation, inheritance, and polymorphism.

  • A carriage return is a character that moves the cursor to the beginning of the next line.

  • The syntax for making a 2D matrix is: int matrix[][] = new int[rows][columns];

  • A nested loop in a switch statement is used to handle multiple cases with the same code block.

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Q2. What is the difference between Abstraction and Interface?

Ans.

Abstraction is hiding implementation details while Interface is a contract for implementing classes.

  • Abstraction is achieved through abstract classes and methods.

  • Interface defines a set of methods that a class must implement.

  • Abstraction focuses on hiding complexity and providing a simpler interface.

  • Interface focuses on defining a standard for communication between classes.

  • Abstraction is a way to achieve modularity and maintainability.

  • Interface is a way to achieve polymorphism ...read more

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Q3. What is perform? Mention its different types.

Ans.

Perform refers to carrying out a task or activity. Its types include job performance, academic performance, and athletic performance.

  • Perform refers to the execution of a task or activity.

  • Job performance refers to how well an employee performs their job duties.

  • Academic performance refers to a student's success in their studies.

  • Athletic performance refers to an athlete's ability to perform in their sport.

  • Other types of performance include musical performance, theatrical perform...read more

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Q4. What is the difference between a table and a view?

Ans.

A table is a physical storage structure while a view is a virtual table created from a query.

  • A table stores data in a structured manner while a view is a virtual table created from a query.

  • A table can have indexes and constraints while a view cannot.

  • A table can be updated, inserted or deleted while a view cannot be directly modified.

  • A view can be used to simplify complex queries or restrict access to certain columns of a table.

  • Example: A table named 'employees' can have a vie...read more

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Q5. What are the layers of the OSI model?

Ans.

The OSI model has 7 layers that define how data is transmitted over a network.

  • The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

  • Each layer has a specific function and communicates with the layers above and below it.

  • For example, the Physical layer deals with the physical transmission of data, while the Application layer deals with user interfaces and applications.

  • The OSI model is a conceptual model and is used to help understand ho...read more

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Q6. What do you know about DXC?

Ans.

DXC is a global IT services company that provides end-to-end solutions for clients in various industries.

  • DXC was formed in 2017 through the merger of CSC and the Enterprise Services business of Hewlett Packard Enterprise.

  • They offer services in areas such as cloud computing, cybersecurity, analytics, and digital transformation.

  • DXC has clients in industries such as healthcare, finance, manufacturing, and government.

  • They have a global workforce of over 130,000 employees.

  • DXC is h...read more

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Q7. What is Polymorphism?

Ans.

Polymorphism is the ability of an object to take on many forms.

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

  • It is achieved through method overriding and method overloading.

  • Example: A shape class can have different subclasses like circle, square, and triangle, each with their own implementation of the draw method.

  • Example: A method can take in different types of objects as parameters, and the appropriate method will be called ba...read more

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Q8. What is SQL Error 911?

Ans.

SQL Error 911 is a database connection error that occurs when the maximum number of concurrent connections has been reached.

  • Occurs when the maximum number of concurrent connections has been reached

  • Can be resolved by increasing the maximum number of connections allowed

  • May also be caused by insufficient memory or disk space

  • Commonly seen in IBM DB2 databases

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Q9. Which database you have used for practical in SQL subject

Ans.

I have used MySQL for practical in SQL subject.

  • MySQL is a popular open-source relational database management system.

  • I have practiced creating tables, querying data, and performing various operations in MySQL.

  • I have also worked with MySQL Workbench for database design and management.

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Q10. What is the lastest technology that you have learnt

Ans.

The latest technology I have learned is artificial intelligence (AI).

  • AI is a branch of computer science that focuses on creating intelligent machines capable of performing tasks that typically require human intelligence.

  • Some examples of AI applications include virtual assistants like Siri and Alexa, self-driving cars, and recommendation systems.

  • I have learned about different AI techniques such as machine learning, natural language processing, and computer vision.

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Q11. What is OS? And paging techniques

Ans.

OS stands for Operating System. Paging is a memory management technique used by OS to store and retrieve data from secondary storage.

  • OS is a software that manages computer hardware resources and provides common services for computer programs.

  • Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory.

  • Paging allows the operating system to use virtual memory, which is larger than physical memory.

  • Examples of paging techniques includ...read more

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Q12. What are four pillars of oops

Ans.

Four pillars of OOPs are Abstraction, Encapsulation, Inheritance, and Polymorphism.

  • Abstraction: Hiding implementation details and showing only necessary information.

  • Encapsulation: Binding data and functions together and restricting access to data.

  • Inheritance: Creating new classes from existing ones, inheriting properties and methods.

  • Polymorphism: Ability of objects to take on multiple forms or behaviors.

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Q13. What is data structure and linked list

Ans.

Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently. A linked list is a linear data structure where elements are stored in nodes and each node points to the next node in the sequence.

  • Data structure organizes and stores data efficiently

  • Linked list is a linear data structure with nodes pointing to next node

  • Example: Singly linked list, doubly linked list

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Q14. How to implement a project in sap

Ans.

To implement a project in SAP, you need to follow a structured approach involving planning, configuration, testing, and deployment.

  • Define project scope and objectives

  • Gather requirements from stakeholders

  • Configure SAP system based on requirements

  • Test the system to ensure functionality and performance

  • Train end users on using the new system

  • Deploy the project and monitor for any issues

  • Provide ongoing support and maintenance

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Q15. what is java, oops, dsa, etc

Ans.

Java is a popular programming language, OOPs stands for Object-Oriented Programming, DSA refers to Data Structures and Algorithms.

  • Java is a high-level, class-based, object-oriented programming language known for its portability and versatility.

  • OOPs is a programming paradigm based on the concept of 'objects', which can contain data in the form of fields and code in the form of procedures.

  • DSA involves the study of data structures (like arrays, linked lists, trees) and algorithm...read more

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Q16. What is data encapsulation

Ans.

Data encapsulation is the process of hiding implementation details and exposing only necessary information.

  • It is a fundamental concept in object-oriented programming.

  • It helps in achieving data abstraction and information hiding.

  • It allows for better control over data and prevents unauthorized access.

  • Example: A class in Java that has private variables and public methods to access them.

  • Example: A capsule that contains medicine and only allows access through a small opening.

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Q17. what are abstract classes

Ans.

Abstract classes are classes that cannot be instantiated and are meant to be subclassed.

  • Abstract classes may contain abstract methods that must be implemented by subclasses.

  • Abstract classes can have both abstract and concrete methods.

  • An example of an abstract class in Java is 'Shape', with abstract methods like 'calculateArea' and concrete methods like 'draw'.

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Q18. what is an interface

Ans.

An interface is a point of interaction between components, devices, or systems.

  • An interface defines the methods that a class must implement

  • Interfaces allow for multiple inheritance in programming languages like Java

  • Interfaces are used to enforce a contract between different parts of a system

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