10+ TCS Junior Engineer Interview Questions and Answers

Yes, percentage in technical subjects is checked for Junior Engineer position.

• Technical subjects are a crucial part of the Junior Engineer role.

• The percentage in technical subjects is checked to assess the candidate's knowledge and understanding of the subject.

• The weightage given to technical subjects may vary depending on the company and job profile.

• Candidates should focus on scoring well in technical subjects to increase their chances of getting selected.

• For example, if the...read more

Inheritance in Java allows a class to inherit properties and methods from another class.

• A subclass can inherit from a superclass using the 'extends' keyword

• The subclass can access the public and protected members of the superclass

• The 'super' keyword is used to call the constructor or method of the superclass

• Inheritance promotes code reuse and allows for polymorphism

• Example: class Dog extends Animal { ... }

Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.

• Array is a fixed-size collection of elements of the same data type, while ArrayList is a dynamic-size collection that can grow or shrink as needed.

• Arrays can store primitive data types and objects, while ArrayList can only store objects.

• Arrays require a specified size at the time of creation, while ArrayList can dynamically resize itself.

• Arrays use square brackets [] for declaration,...read more

JavaScript is a programming language used for web development. Angular is a JavaScript framework for building web applications.

• JavaScript is a client-side scripting language used for creating interactive web pages.

• Angular is a JavaScript framework developed by Google for building dynamic web applications.

• Angular uses TypeScript, a superset of JavaScript, for building applications.

• Angular provides features like two-way data binding, dependency injection, and reusable component...read more

C++ is a high-level programming language used for developing software and applications. iOS is a mobile operating system developed by Apple.

• C++ is an object-oriented language

• iOS is used for developing applications for Apple devices

• C++ is used for developing operating systems, browsers, games, and more

• iOS is known for its user-friendly interface and security features

Spring Boot is a Java-based framework used to create stand-alone, production-grade Spring-based Applications.

• Spring Boot simplifies the process of developing and deploying Spring applications.

• It provides a set of pre-configured tools and conventions to get started quickly.

• Spring Boot eliminates the need for manual configuration and boilerplate code.

• It includes embedded servers like Tomcat, Jetty, or Undertow for easy deployment.

• Spring Boot allows for easy integration with oth...read more

HTML is a markup language used for creating web pages. HTTPS is a secure version of HTTP for secure communication over the internet.

• HTML stands for HyperText Markup Language

• It is used to create the structure and content of web pages

• HTML uses tags to define elements such as headings, paragraphs, images, links, etc.

• HTTPS stands for HyperText Transfer Protocol Secure

• It is a secure version of HTTP that encrypts data sent between a website and a user's browser

• HTTPS is used to ensu...read more

C programming is a high-level language used for system programming, embedded systems, and game development.

• C is a compiled language

• It has a rich set of operators and built-in functions

• C is used for developing operating systems, device drivers, and firmware

• Examples of C-based software include Linux, MySQL, and Adobe Photoshop

• C is known for its efficiency and speed

Oops concepts refer to Object-Oriented Programming concepts which include inheritance, polymorphism, encapsulation, and abstraction.

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

• Polymorphism: Allows objects to be treated as instances of their parent class.

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

• Abstraction: Hides the complex implementation details and only shows the necessary features to the outs...read more

A constructor is a special type of method in a class that is automatically called when an object of that class is created.

• Constructors have the same name as the class they belong to

• Constructors do not have a return type

• Constructors can be used to initialize the object's state or perform any necessary setup

• Example: public class Car { public Car() { // constructor code here } }

HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap is part of the Java Collections framework.

• It uses hashing to store key-value pairs in an array.

• Example: HashMap map = new HashMap<>(); map.put("key1", 1); int value = map.get("key1");

SQL query is a command used to retrieve, insert, update, or delete data from a database.

• SQL query is used to interact with databases by performing operations like selecting, inserting, updating, or deleting data.

• Examples of SQL queries include SELECT * FROM table_name, INSERT INTO table_name VALUES (value1, value2), UPDATE table_name SET column_name = value WHERE condition, DELETE FROM table_name WHERE condition.

throw is a keyword used to explicitly throw an exception in Java, while throws is used in method signature to declare the exceptions that can be thrown by the method.

• throw is used to throw an exception explicitly in Java code

• throws is used in method signature to declare the exceptions that can be thrown by the method

• Example: throw new Exception();

• Example: public void method() throws Exception {};