TCS QA Analyst Interview Questions and Answers

Q1. All technical related to that position which you want to apply.
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Q1. Deep questions on coding as well as technical like scenario based questions.
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Q1. What are the Python data structures and about oops
Ans. 
Python data structures include lists, tuples, sets, and dictionaries. OOPs is a programming paradigm.
• Python data structures are used to store and organize data in a program

• Lists are ordered and mutable, tuples are ordered and immutable, sets are unordered and unique, and dictionaries are unordered key-value pairs

• OOPs is a programming paradigm that focuses on creating objects that have properties and methods

• In Python, c...read more
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Q2. What is pickling and unpickling
Ans. 
Pickling is the process of converting a Python object into a byte stream, while unpickling is the reverse process.
• Pickling is used to store Python objects in a file or transfer them over a network.

• Unpickling is used to retrieve the original Python object from the stored byte stream.

• The pickle module in Python is used for pickling and unpickling.

• Example: Pickling a list - pickle.dump([1, 2, 3], open('data.pkl', 'wb'))

• Ex...read more
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Q3. Types of locators in selenium
Ans. 
Locators in Selenium are used to identify web elements on a web page. There are several types of locators available.
• Types of locators in Selenium include ID, Name, Class Name, Tag Name, Link Text, Partial Link Text, CSS Selector, and XPath.

• ID and Name locators are the most commonly used and are unique to each element.

• Class Name and Tag Name locators are used to identify multiple elements with the same class or tag name...read more
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Q4. Types of path and which one is used
Ans. 
There are two types of paths - relative and absolute. Both are used depending on the context.
• Relative paths are used to navigate within the current directory or subdirectories.

• Absolute paths are used to navigate to a specific location in the file system.

• Examples of relative paths: './file.txt', '../folder/file.txt'

• Examples of absolute paths: '/home/user/file.txt', 'C:/Users/user/Documents/file.txt'
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Q1. Write a Program for reversing a string without using inbuilt methods
Ans. 
Program to reverse a string without using inbuilt methods
• Create an empty string to store the reversed string

• Loop through the original string from the end to the beginning

• Add each character to the empty string

• Return the reversed string
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Q2. Program for create list from given dictionary
Ans. 
A program to create a list from a given dictionary.
• Iterate through the dictionary and append each key-value pair to a list.

• Use list comprehension to create a list from the dictionary.

• Sort the list based on keys or values if required.
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Q3. What is decorator with an example
Ans. 
Decorator is a design pattern that allows behavior to be added to an individual object, either statically or dynamically.
• Decorator pattern involves a set of decorator classes that are used to wrap concrete components.

• Decorators provide a flexible alternative to subclassing for extending functionality.

• An example of decorator pattern is adding toppings to a pizza. Each topping is a decorator that wraps the pizza object.

• A...read more
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Q4. What is lambda, map, filter, local and global variables, list comprehension, range and xrange
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Q5. How to perform crud operations in python
Ans. 
CRUD operations in Python can be performed using various libraries and frameworks.
• Use SQLalchemy ORM for database operations

• Use Flask or Django for building web applications

• Use pandas library for data manipulation

• Use file handling functions for file operations
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Q6. Difference of deep copy and shallow copy
Ans. 
Deep copy creates a new object with the same values as the original, while shallow copy creates a new object with references to the original's values.
• Deep copy duplicates all nested objects and their values, while shallow copy only duplicates the top-level object.

• Deep copy is more memory-intensive and time-consuming than shallow copy.

• Example of deep copy: copying a list of dictionaries using deepcopy() in Python.

• Exampl...read more
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Q7. Explain Django Architecture
Ans. 
Django follows Model-View-Controller (MVC) architectural pattern.
• Django has a high-level architecture that follows the Model-View-Controller (MVC) architectural pattern.

• The Model layer represents the database schema and business logic.

• The View layer handles the presentation logic and renders the templates.

• The Controller layer acts as an intermediary between the Model and View layers.

• Django also includes a URL routing s...read more
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Q1. Basic question on data structure
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It was an aptitude and email writing

Q1. 1. Regarding your project , 2. Regarding some of the basic coding with preferred language
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Q1. Regarding the company they would be asking
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Q1. Regarding the company and the package
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