SHL Chemical AGM Interview Questions and Answers

Python interpreter is a program that executes Python code.

• It reads Python code and converts it into machine-readable code

• It executes the code line by line

• It also provides a command-line interface for interactive programming

• Examples: CPython, Jython, IronPython

Python was developed by Guido van Rossum in the late 1980s.

• Guido van Rossum started working on Python in December 1989.

• Python's design philosophy emphasizes code readability and ease of use.

• Python is an interpreted, high-level, general-purpose programming language.

• Python's popularity has been steadily increasing over the years.

• Python is open-source and has a large community of developers contributing to its development

PEP8 is a style guide for Python code.

• PEP8 provides guidelines for formatting, naming, and organizing Python code.

• It covers topics such as indentation, line length, variable naming, and function and class definitions.

• Adhering to PEP8 can improve code readability and maintainability.

• Tools such as Flake8 and PyLint can be used to check code against PEP8 standards.

Python has several built-in data types including integers, floats, strings, booleans, lists, tuples, and dictionaries.

• Integers are whole numbers without decimals

• Floats are numbers with decimals

• Strings are sequences of characters

• Booleans are either True or False

• Lists are ordered collections of items

• Tuples are ordered, immutable collections of items

• Dictionaries are unordered collections of key-value pairs

A class is a blueprint for creating objects that have similar properties and behaviors.

• A class is a user-defined data type that encapsulates data and functions.

• It provides a way to organize and structure code.

• Objects are instances of a class.

• Classes can inherit properties and behaviors from other classes.

• Example: A class 'Car' can have properties like 'color', 'model', and behaviors like 'start', 'stop'.

An object is an instance of a class that encapsulates data and behavior.

• Objects are created from classes

• They have attributes (data) and methods (behavior)

• Objects can interact with each other through method calls

• Examples include a car object with attributes like make, model, and color, and methods like start and stop

• Another example is a person object with attributes like name and age, and methods like walk and talk

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows code reuse and promotes code organization.

• The existing class is called the parent or superclass, and the new class is called the child or subclass.

• The child class inherits all the properties and methods of the parent class and can also add its own unique properties and ...read more

Multiple inheritance is the ability of a class to inherit properties and behavior from multiple parent classes.

• It allows a class to inherit from more than one parent class.

• It can lead to the diamond problem where a class inherits from two classes that have a common base class.

• Languages like C++ support multiple inheritance while others like Java do not.

• Example: A class can inherit properties from both a 'Vehicle' class...read more

Data abstraction is the process of hiding implementation details and showing only the necessary information to the user.

• Abstraction is achieved through abstract classes and interfaces

• It helps in reducing complexity and increasing efficiency

• Example: A car dashboard shows only necessary information like speed, fuel level, etc. and hides the internal workings of the car

• Abstraction is one of the four fundamental concepts o

An object is an instance of a class that encapsulates data and behavior.

• Objects have attributes (data) and methods (behavior).

• Objects can interact with each other through method calls.

• Objects can be created from classes.

• Examples of objects include a car, a person, or a bank account.

Multi threading is the ability of a program to perform multiple tasks concurrently.

• It allows for better utilization of CPU resources

• It can improve program performance and responsiveness

• Examples include web servers handling multiple requests simultaneously

• It requires careful management of shared resources to avoid race conditions

Yes, we can create multiple objects in programming.

• Objects are instances of a class.

• We can create multiple objects of the same class.

• Each object has its own set of instance variables and methods.

• Objects can interact with each other through their methods.

• Example: creating multiple instances of a 'Person' class for different people.

Encapsulation types are data, procedural and combination.

• Data encapsulation hides data from outside world and provides access through methods.

• Procedural encapsulation hides implementation details of a procedure.

• Combination encapsulation is a mix of data and procedural encapsulation.

• Examples include private variables in a class, access modifiers in Java, etc.

Inner join returns only matching rows from both tables while outer join returns all rows from one table and matching rows from the other.

• Inner join is used to combine data from two tables based on a common column.

• Outer join is used to combine data from two tables where one table may not have matching rows in the other.

• There are three types of outer join: left outer join, right outer join, and full outer join.

• Left outer...read more

An abstract class is a class that cannot be instantiated and is used as a base class for other classes.

• An abstract class can have abstract and non-abstract methods.

• Abstract methods have no implementation and must be implemented by the derived class.

• An abstract class can have constructors and fields.

• An abstract class can be used to define a common interface for a group of related classes.

• Example: Animal is an abstract c...read more

Normalization is a process of organizing data in a database to reduce redundancy and dependency.

• Normalization is used to eliminate data redundancy and dependency.

• 3NF (Third Normal Form) eliminates transitive dependencies while BCNF (Boyce-Codd Normal Form) eliminates partial dependencies.

• 3NF is a subset of BCNF.

• Normalization helps in improving data consistency and integrity.

• Normalization can also improve database perfo

I am a software developer with experience in various programming languages and a passion for creating innovative solutions.

• Proficient in Java, C++, and Python

• Experience with web development using HTML, CSS, and JavaScript

• Familiarity with agile development methodologies

• Strong problem-solving and analytical skills

• Excellent communication and teamwork abilities

Array is a collection of elements of same data type. Linked list is a data structure where each element points to the next one.

• Arrays have fixed size, linked lists can grow dynamically

• Accessing elements in an array is faster than in a linked list

• Inserting or deleting elements in a linked list is faster than in an array

• Arrays are stored in contiguous memory locations, linked lists are not

• Arrays are used for random acces

The OSI model is a conceptual model that describes the communication functions of a telecommunication or computing system.

• The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

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

• The Physical layer deals with the physical transmission of data, while the Application layer deals with u...read more

The OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.

• The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

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

• The Physical layer deals with the physical transmission of data, while the Applicati...read more