30+ TCS Developer Interview Questions and Answers

To setup a network in a lab, you need equipment and a plan.

• Determine the network topology and design

• Choose appropriate networking equipment such as routers, switches, and cables

• Configure network settings such as IP addresses and subnet masks

• Test the network to ensure connectivity and functionality

• Consider security measures such as firewalls and access control

• Examples of equipment: Cisco routers, Juniper switches, Cat6 Ethernet cables

Functions return a value while stored procedures do not.

• Functions can be used in SQL statements while stored procedures cannot.

• Functions can be called from within stored procedures.

• Functions can be used in views while stored procedures cannot.

• Functions can have input parameters while stored procedures can have both input and output parameters.

OPPS stands for Object-Oriented Programming Principles. It includes concepts like encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling of data and methods into a single unit (class) to hide implementation details.

• Inheritance: Ability of a class to inherit properties and methods from another class.

• Polymorphism: Ability to use a single interface to represent different types of objects.

• Abstraction: Simplifying complex systems by breaking them down in...read more

The bot is ready to run when it has completed all necessary initialization processes.

• Check if all required dependencies have been installed

• Ensure all necessary configurations have been set up

• Verify that the bot can connect to any required APIs or databases

• Test the bot's functionality to ensure it is working as expected

Code to find the difference between two dates.

• Use a date library like moment.js or date-fns

• Subtract the earlier date from the later date to get the difference

• Convert the difference to the desired format (days, hours, etc.)

Composition is a strong relationship where the child object cannot exist without the parent object. Aggregation is a weak relationship where the child object can exist independently.

• Composition is a 'has-a' relationship, where the parent object owns the child object.

• Aggregation is a 'has-a' relationship, where the child object is a part of the parent object.

• In composition, the child object's lifetime is managed by the parent object.

• In aggregation, the child object's lifetime ...read more

M scripting is a programming language used for data manipulation and analysis. Based workspace is a feature in M scripting for managing data and variables.

• M scripting is a programming language used in Power Query for data transformation and manipulation.

• Based workspace in M scripting allows users to manage data and variables in a structured manner.

• Examples of M scripting functions include Table.AddColumn, Table.TransformColumns, and List.Transform.

Code to transpose a matrix

• Iterate through rows and columns of the matrix

• Swap the elements at (i,j) and (j,i) positions

• Return the transposed matrix

The 4 pillars of C++ are Abstraction, Encapsulation, Inheritance, and Polymorphism.

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

• Encapsulation: Binding data and functions together to prevent external interference.

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

• Polymorphism: Using a single interface to represent multiple types of objects.

There are four types of joining in SQL: Inner Join, Left Join, Right Join, and Full Join.

• Inner Join returns only the matching rows from both tables.

• Left Join returns all the rows from the left table and matching rows from the right table.

• Right Join returns all the rows from the right table and matching rows from the left table.

• Full Join returns all the rows from both tables, with NULL values in the columns where there is no match.

• Examples: Inner Join - SELECT * FROM table1 IN...read more

Stages are the different phases of a process in nProcess Studio, a software development tool for creating business applications.

• nProcess Studio is a software development tool used for creating business applications

• Stages are the different phases of a process in nProcess Studio

• Each stage represents a step in the process and can have its own set of rules and actions

• Examples of stages include 'Data Entry', 'Validation', and 'Approval'

• Stages can be customized to fit the specific ...read more

A query string is a part of a URL that contains data to be passed to a web server.

• It starts with a question mark (?) and is followed by key-value pairs separated by ampersands (&).

• It is commonly used to filter or sort data on a web page.

• Example: www.example.com/search?q=apple&category=fruit

• To use it, simply append the query string to the end of the URL.

To swap values of two variables without a third variable, use arithmetic operations.

• Use addition and subtraction to swap values

• Example: a = 5, b = 10. a = a + b (a = 15), b = a - b (b = 5), a = a - b (a = 10)

response.redirect is a method used in web development to redirect the user to a different URL.

• response.redirect is used to redirect the user to a different URL

• It is commonly used in web applications to redirect users after a successful login or when accessing restricted pages

• The method can be used with different programming languages and frameworks, such as ASP.NET, PHP, and Node.js

• The redirected URL can be specified as an absolute or relative path

A unique key is a field or combination of fields in a database table that uniquely identifies each record.

• A unique key ensures that no two records in a table have the same values for the specified field(s).

• It can be a single field or a combination of fields.

• It is used to enforce data integrity and prevent duplicate records.

• Examples include primary keys, candidate keys, and alternate keys.

ASP.NET life cycle is the series of events that occur during the processing of a request.

• ASP.NET life cycle includes stages like initialization, page rendering, and disposal.

• During initialization, the page and its controls are created and initialized.

• During page rendering, the page is processed and HTML is generated.

• During disposal, resources used by the page are released.

• Events like Page_Load and Page_PreRender occur during the life cycle.

• Understanding the life cycle is impo...read more

View state is a hidden state of the page that stores values of controls and other page-specific data.

• View state is used to maintain the state of server-side controls between postbacks.

• It is stored in a hidden field on the page and is encrypted for security purposes.

• View state can be disabled to improve performance, but this may cause issues with control state.

• Example: A user fills out a form, but then navigates away from the page. When they return, their form data is still th...read more

A constraint is a limitation or restriction on something.

• Constraints can be applied in various fields such as software development, engineering, and project management.

• In software development, constraints can include limitations on memory usage, processing speed, and storage capacity.

• In engineering, constraints can include limitations on materials, dimensions, and weight.

• In project management, constraints can include limitations on time, budget, and resources.

• Examples of cons...read more

The cond parameter is a conditional parameter used in programming to evaluate a series of conditions and return a value based on the first condition that is true.

• Cond parameter is commonly used in programming languages like Lisp and Clojure.

• It takes a series of pairs where the first element is a condition and the second element is the value to return if the condition is true.

• Example: (cond ((= x 0) 'zero) ((= x 1) 'one) (true 'other))

Exception handling is the process of responding to unexpected events or errors in a program.

• Exception handling allows developers to gracefully handle errors and prevent crashes in a program.

• It involves using try, catch, and finally blocks to handle exceptions.

• Examples include catching a divide by zero error or a file not found exception.

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

• Polymorphism 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 parent class Animal can have child classes like Dog, Cat, and Bird. Each child class can have its own implementation of the method 'makeSound'.

• Polymorphism makes code more flexible and reusable.

Null indicator is a flag used to indicate whether a value is null or not in database systems.

• Null indicator is used in database systems to handle null values efficiently.

• It is typically a single bit flag associated with a data field.

• A null indicator value of 0 indicates that the corresponding value is not null, while a value of 1 indicates it is null.

OOPs concept 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.

• OOPs stands for Object-Oriented Programming

• Key concepts include encapsulation, inheritance, and polymorphism

• Example: Inheritance - a class 'Animal' can be inherited by classes like 'Dog' and 'Cat'

Session is a way to store and retrieve user data between HTTP requests.

• Session is a temporary storage of user data on the server side.

• It is identified by a unique session ID which is stored in a cookie or URL parameter.

• Session data can be used to maintain user state, such as login status or shopping cart contents.

Object-oriented programming paradigm focusing on objects and classes for code organization and reusability.

• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

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

• Abstraction: hiding the complex implementation details and showing only the necessary features

Procedures are a set of instructions or steps to be followed in order to complete a task or achieve a goal.

• Procedures help in organizing tasks and ensuring consistency in execution.

• They can be written in a formal document or informally communicated.

• Examples include cooking recipes, assembly instructions, and software development processes.

Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones.

• Create an array to store the Fibonacci sequence

• Use a loop to calculate each number in the sequence by adding the previous two numbers

• Start with 0 and 1 as the first two numbers in the sequence

OOPs is a programming paradigm that uses objects to represent real-world entities and encapsulates data and behavior.

• OOPs stands for Object-Oriented Programming.

• It focuses on the concept of objects, which have properties and methods.

• Encapsulation, inheritance, and polymorphism are the three main pillars of OOPs.

• Encapsulation refers to the practice of hiding data and methods within an object.

• Inheritance allows objects to inherit properties and methods from other objects.

• Polymo...read more

Code to generate Fibonacci sequence

• Use a loop to generate Fibonacci numbers

• Start with 0 and 1 as the first two numbers

• Add the previous two numbers to get the next number

• Repeat until desired number of Fibonacci numbers are generated