10+ IT fresher Interview Questions and Answers

I have knowledge of programming languages such as Java, Python, and C++. I am also familiar with web development technologies like HTML, CSS, and JavaScript.

• Proficient in Java, Python, and C++ programming languages

• Familiar with web development technologies like HTML, CSS, and JavaScript

• Knowledge of database management systems like MySQL and Oracle

• Experience with version control systems like Git

• Understanding of software development methodologies like Agile and Waterfall

Inheritance is a mechanism in OOP where a new class is derived from an existing class. Upcasting changes the use of member functions and data members for a child and parent class.

• Inheritance allows a child class to inherit properties and methods from a parent class.

• Upcasting is the process of converting a child class object to a parent class object.

• Upcasting allows a child class object to be treated as a parent class object.

• Upcasting restricts the use of child class-specific ...read more

OOPs is a programming paradigm based on the concept of objects. DBMS is a software system to manage databases, while RDBMS is a type of DBMS that uses a relational model.

• OOPs stands for Object-Oriented Programming System

• Java is an OOPs language

• DBMS is a software system to manage databases

• RDBMS is a type of DBMS that uses a relational model

• DBMS is used for small-scale applications, while RDBMS is used for large-scale applications

• Java supports RDBMS through JDBC API

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

• Java - used for building enterprise-level applications

• Python - known for its simplicity and versatility

• C++ - used for system programming and game development

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

• Java is an object-oriented programming language that follows the OOPS concept.

• OOPS focuses on encapsulation, inheritance, and polymorphism.

• Encapsulation is the process of hiding data and methods within a class.

• Inheritance allows a class to inherit properties and methods from its parent class.

• Polymorphism allows objects to take on multiple forms or behaviors.

• Example...read more

A null pointer is a pointer that does not point to any memory location.

• A null pointer is represented by the value 0 or NULL.

• Dereferencing a null pointer results in a segmentation fault.

• Null pointers are commonly used to indicate the end of a linked list or array.

• Null pointers can be assigned to any pointer type.

A pointer is a variable that stores the memory address of another variable.

• Pointers allow direct manipulation of memory.

• They are used to access and modify data indirectly.

• Pointers are commonly used in dynamic memory allocation.

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

The command is used to display the current working directory in a command line interface.

• The command is 'pwd'

• It stands for 'print working directory'

• It is commonly used in Unix-based systems

• It helps users identify their current location in the file system

Structures are user-defined data types that allow storing multiple data types under a single name.

• Structures are used to group related data together.

• They can contain variables of different data types.

• Structures can also contain functions.

• Structures are defined using the 'struct' keyword.

• Example: struct student { char name[20]; int age; float marks; };

• Structures can be passed as arguments to functions.

• They can also be used to create linked lists and other data structures.

A nested structure is a structure within another structure in programming.

• It allows for more complex data structures to be created

• It can be used in various programming languages such as C++, Java, and Python

• An example of a nested structure is a struct within a struct in C++

Classes are templates for creating objects that have similar properties and methods.

• Classes are used in object-oriented programming.

• They define the properties and methods that objects of that class will have.

• Objects are instances of a class.

• Classes can inherit properties and methods from other classes.

• Examples of classes include 'Person', 'Car', and 'Animal'.

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Common commands include SELECT, INSERT, UPDATE, and DELETE

• SQL is used in various industries such as finance, healthcare, and e-commerce