200+ Assistant System Engineer Trainee Interview Questions and Answers

OOPS (Object-Oriented Programming System) features include encapsulation, inheritance, polymorphism, and abstraction.

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

• Inheritance: Ability to create a new class by inheriting attributes and methods from an existing class.

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

• Abstraction: Hiding the complex implementation details and showing only th...read more

I have presented a paper on Artificial Intelligence at a national conference.

• Presented a paper on AI at a national conference organized by IEEE.

• Discussed the impact of AI on the future of work and society.

• Received positive feedback from the audience and panelists.

• Networked with professionals in the field and gained insights into current research.

• Published the paper in the conference proceedings.

Swapping numbers without using a third variable.

• Add the two numbers to be swapped

• Assign the sum to the first variable

• Subtract the second variable from the sum and assign it to the second variable

• Subtract the second variable from the first variable and assign it to the first variable

The prototype of C language is int main()

• The prototype specifies the return type and parameters of a function

• int main() is the prototype for the main function in C

• The parentheses are required even if there are no parameters

• Other functions can have different prototypes depending on their return type and parameters

I am proficient in Java, Python, and C++.

• Proficient in Java, Python, and C++

• Experience with object-oriented programming

• Familiarity with data structures and algorithms

• Knowledge of web development frameworks such as Django and Spring

Call by reference passes the address of the variable as an argument, while call by value passes the value of the variable.

• Call by reference allows the function to modify the actual value of the variable passed as an argument.

• Call by value only allows the function to work with a copy of the variable's value.

• Example: In call by reference, changes made to the parameter inside the function will reflect outside the function. In call by value, changes made to the parameter inside t...read more

Collections in Java are classes and interfaces that group multiple objects into a single unit.

• Collections provide a way to manage and manipulate groups of objects.

• They are used to store, retrieve, and manipulate data in a structured way.

• Examples of collections include ArrayList, LinkedList, HashSet, and TreeMap.

• Collections can be used to sort, search, filter, and modify data.

• They are an important part of Java programming and are used extensively in real-world applications.

Functional programming focuses on functions and immutability, while object oriented programming focuses on objects and classes.

• Functional programming uses pure functions that do not have side effects

• Object oriented programming uses objects that encapsulate data and behavior

• In functional programming, data is immutable and functions are first-class citizens

• In object oriented programming, objects interact with each other through methods and inheritance

• Example: Functional program...read more

OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.

• There are four main types of OOPs: Abstraction, Encapsulation, Inheritance, and Polymorphism.

• Abstraction is the process of hiding complex implementation details and showing only the necessary information to the user.

• Encapsulation is the process of binding data and functions that manipulate that data together in a single unit.

• Inheritance is the process of creating new clas...read more

Data types are classifications of data items that indicate the kind of values they contain.

• Primitive data types: int, float, double, char, boolean

• Non-primitive data types: arrays, strings, classes, interfaces

• Examples: int age = 25, float price = 10.5, char grade = 'A', boolean isTrue = true, String name = 'John', int[] numbers = {1, 2, 3}

Pointers are variables that store memory addresses of other variables in a program.

• Pointers allow for dynamic memory allocation and manipulation.

• They are used to pass data between functions efficiently.

• Pointers can be used to create complex data structures like linked lists and trees.

• Example: int *ptr; // declares a pointer to an integer variable

• Example: ptr = # // assigns the address of num to ptr

• Example: *ptr = 10; // assigns the value 10 to the variable pointed to by ptr

Yes, Python is a case sensitive language.

• Variable names 'myVar' and 'myvar' are different in Python.

• Keywords like 'if', 'else', 'while' are case sensitive.

• Function names and module names are also case sensitive.

Switch values of two variables without using a third variable

• Use XOR operator

• Addition and subtraction can also be used

• Pointers can be used to swap values

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 Cow. All these child classes can have their own implementation of the method 'makeSound', which is defined in the parent class.

• Polymorphism makes code more flexible and reusab...read more

Program to find the greatest number among three numbers

• Declare three variables to store the three numbers

• Compare the first two numbers and store the greater one in a temporary variable

• Compare the temporary variable with the third number and store the greatest one in another variable

• Print the greatest number

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

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

• It defines the attributes and methods that an object of that class will have.

• Objects are instances of a class.

• Classes can inherit properties and methods from other classes.

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

The operating system in my laptop is Windows 10.

• My laptop runs on Windows 10 operating system.

• Windows 10 is a popular operating system developed by Microsoft.

• It has a user-friendly interface and supports a wide range of software applications.

• Some of the key features of Windows 10 include Cortana, Microsoft Edge, and virtual desktops.

A program to count the number of deleted characters in a given name.

• Create a variable to store the count of deleted characters.

• Loop through each character in the name.

• If the character is not present in the name, increment the count variable.

• Return the count variable.

A list is mutable and can be changed, while a tuple is immutable and cannot be changed.

• List is defined using square brackets [], while tuple is defined using parentheses ().

• Elements in a list can be modified, added, or removed, while elements in a tuple cannot be changed once defined.

• Lists are typically used for collections of items that may need to be modified, while tuples are used for fixed collections of items.

• Example: list - [1, 2, 3], tuple - (4, 5, 6)

Encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.

• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for data hiding, which prevents direct access to an object's attributes.

• Encapsulation also helps in achieving data abstraction, where only necessary details are exposed to the outside world.

• Example: In a class representing a car, the variables like speed and ...read more

Code for cube of number, prime number, sorting, DBMS related, SQL

• Cube of a number: num*num*num

• Prime number: check if num is divisible by any number from 2 to num-1

• Sorting: use built-in sorting functions or implement bubble sort, merge sort, quick sort, etc.

• DBMS related: learn about database design, normalization, SQL queries, etc.

• SQL: use SQL commands to create, modify, and query databases

Abstraction is the process of hiding complex details and showing only essential features of an object or system.

• Abstraction helps in managing complexity by breaking down a system into smaller, more manageable parts.

• It allows us to focus on the important aspects of a system while ignoring the irrelevant details.

• Abstraction is used in programming to create classes and objects that represent real-world entities.

• For example, a car object can have properties like make, model, and ...read more

One sorting technique is Bubble Sort in Python.

• Initialize a flag to track if any swaps are made in a pass

• Repeat until no swaps are made: Compare adjacent elements and swap if necessary

• Example: def bubble_sort(arr): for i in range(len(arr)): for j in range(0, len(arr)-i-1): if arr[j] > arr[j+1]: arr[j], arr[j+1] = arr[j+1], arr[j]

SQL query to fetch data from two tables

• Use JOIN keyword to combine data from two tables

• Specify the columns you want to retrieve in the SELECT statement

• Use ON clause to specify the relationship between the tables

Program to print Fibonacci series in Python

• Initialize variables for first two numbers in the series (0 and 1)

• Use a loop to calculate and print the next number by adding the previous two numbers

• Continue the loop until the desired number of terms is reached

Traversing a linked list involves iterating through each node starting from the head node.

• Start at the head node

• Iterate through each node by following the 'next' pointer

• Stop when reaching the end of the list (next pointer is null)

Program to calculate Simple Interest

• Take input of principal amount, rate of interest and time period

• Calculate simple interest using formula: (P * R * T) / 100

• Display the calculated simple interest

I know multiple programming languages including Java, Python, and C++.

• Proficient in Java with experience in developing web applications using Spring framework

• Familiar with Python for data analysis and machine learning

• Experience in C++ for competitive programming and algorithm development

Rajesh Gopinathan is the CEO of TCS.

• Rajesh Gopinathan took over as CEO of TCS in 2017.

• He has been with TCS since 2001 and has held various leadership roles.

• Under his leadership, TCS has continued to grow and expand globally.

Python is called an interpreted language because it executes code line by line at runtime.

• Python code is not compiled into machine code before execution, instead it is translated into intermediate code which is then interpreted by the Python interpreter.

• This allows for easier debugging and dynamic typing, as code can be executed and tested immediately without the need for compilation.

• Interpreted languages like Python are generally slower than compiled languages, as the code i...read more

Program to reverse a string

• Use a loop to iterate through the characters of the string

• Create a new string and append each character in reverse order

• Return the reversed string

Python is a high-level, interpreted programming language known for its simplicity and readability.

• Python is dynamically typed and supports multiple programming paradigms.

• It has a large standard library and a vast collection of third-party modules.

• Python is widely used in web development, scientific computing, data analysis, and artificial intelligence.

• Some popular frameworks and libraries in Python include Django, Flask, NumPy, and TensorFlow.

OOPS stands for Object-Oriented Programming System

• OOPS is a programming paradigm that focuses on objects and their interactions

• It allows for encapsulation, inheritance, and polymorphism

• Encapsulation refers to the bundling of data and methods within a single unit

• Inheritance allows for the creation of new classes based on existing ones

• Polymorphism allows for the use of a single interface to represent multiple types of objects

DDL, DML, and DCL are SQL commands used to manipulate databases.

• DDL (Data Definition Language) commands are used to create, modify, and delete database objects such as tables, indexes, and views.

• DML (Data Manipulation Language) commands are used to insert, update, and delete data in a database.

• DCL (Data Control Language) commands are used to control access to the database, such as granting or revoking permissions.

• Examples of DDL commands include CREATE TABLE, ALTER TABLE, and...read more

Pointers are variables that store memory addresses. They can be used to manipulate data and improve program efficiency.

• There are four types of pointers: null pointers, void pointers, function pointers, and pointer to pointers.

• Example: int *ptr; // declares a pointer to an integer

• Example: int **ptr; // declares a pointer to a pointer to an integer

Passion for technology and interest in IT led to transition from Mechanical to IT field.

• Discovered passion for technology and IT during college courses

• Realized interest in coding and software development

• Opportunity to work on IT projects during internships

• Belief in the growth and opportunities in the IT industry

The 'this' keyword in Python refers to the current instance of the class.

• Used to refer to the current instance of the class

• Can be used to access variables and methods of the current instance

• Used inside a method of a class

• Example: self.variable_name or self.method_name()

DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.

• DBMS is used to manage large amounts of data efficiently.

• It provides a way to store, retrieve and manipulate data in a structured manner.

• It ensures data integrity and security.

• Examples of DBMS include MySQL, Oracle, SQL Server, and PostgreSQL.

OOPS concepts refer to Object-Oriented Programming concepts which include Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

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

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

Preprocessors are directives that are executed before the compilation of the program.

• Preprocessors start with a # symbol.

• They are used to include header files, define constants, and perform conditional compilation.

• Examples of preprocessor directives are #include, #define, #ifdef, #ifndef, #endif.

• Preprocessors are executed before the actual compilation of the program.

• They are used to modify the source code before it is compiled.

A map is a visual representation of an area, showing physical features, roads, and other details.

• A map can be used for navigation and orientation.

• It can show geographical features such as mountains, rivers, and lakes.

• Maps can also display man-made features such as roads, buildings, and landmarks.

• Different types of maps include topographic, political, and weather maps.

• Maps can be created using various tools such as GPS, satellite imagery, and cartography software.

Multiple Inheritance is a feature in object-oriented programming where a class can inherit properties and behavior from multiple parent classes.

• A class can inherit from more than one class using multiple inheritance.

• It can lead to the diamond problem where two parent classes have a common method or attribute.

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

• It can be useful in creating complex class hierarchies and reusing code.

• Example: A class 'Athlete' can...read more

Java is a statically typed language with a strong emphasis on object-oriented programming, while Python is dynamically typed and focuses on simplicity and readability.

• Java is statically typed, while Python is dynamically typed

• Java is strongly typed, while Python is weakly typed

• Java is compiled to bytecode and runs on a virtual machine, while Python is interpreted

• Java has a strong emphasis on object-oriented programming, while Python supports multiple programming paradigms

• Java...read more

Ceiling fans are dual phase to improve efficiency and reduce energy consumption.

• Dual phase fans have two sets of windings for better control of speed and direction

• They provide smoother operation and reduce noise levels

• Dual phase fans are more energy efficient compared to single phase fans

• Examples of dual phase ceiling fans include those with remote control and variable speed settings

Difference between C and C++, Projects, and OOPs concepts

• C is a procedural language while C++ is an object-oriented language

• C++ supports features like inheritance, polymorphism, and encapsulation

• Projects: developed a calculator using C++, a file management system using C

• OOPs concepts: Abstraction, Encapsulation, Inheritance, Polymorphism

SDLC stands for Software Development Life Cycle, which is a process used by software developers to design, develop, and test high-quality software.

• SDLC is a structured process that consists of several phases including planning, analysis, design, implementation, testing, and maintenance.

• Each phase in the SDLC has its own set of activities and deliverables that must be completed before moving on to the next phase.

• Examples of SDLC models include Waterfall, Agile, and DevOps, eac...read more

A diode is an electronic component that allows current to flow in one direction and blocks it in the opposite direction.

• A diode has two terminals: an anode and a cathode.

• When the voltage across the diode is positive, it conducts current.

• When the voltage across the diode is negative, it blocks current.

• Diodes are commonly used in rectifier circuits to convert AC to DC.

• A simple C program to control a diode can be written using GPIO pins on a microcontroller.

REST APIs work on the HTTP protocol.

• REST APIs use HTTP methods like GET, POST, PUT, DELETE.

• They rely on URLs to access resources.

• Responses are typically in JSON or XML format.

• Example: GET request to 'https://api.example.com/users' to retrieve user data.