Samsung Interview Questions and Answers

Answering questions on OS, DBMS, and Python for Graduate Engineer Trainee (GET) interview.

• OS stands for Operating System, it manages computer hardware and software resources.

• DBMS stands for Database Management System, it is used to manage and organize data in a database.

• Python is a high-level programming language used for web development, data analysis, and artificial intelligence.

• Primary key is a unique identifier for each record in a database table.

• Basics of OS include proc...read more

Swapping two numbers without using a third variable.

• Use arithmetic operations to swap the numbers

• Addition and subtraction can be used

• XOR operation can also be used

Different types of OS and their uses. Difference between Python and C++.

• Operating systems include Windows, macOS, Linux, iOS, Android, etc.

• Windows is commonly used for personal computers, while Linux is popular for servers.

• Python is an interpreted language, while C++ is a compiled language.

• Python is easier to learn and write code quickly, while C++ is faster and more efficient.

• Python is commonly used for web development, data analysis, and artificial intelligence, while C++ i...read more

Primary key uniquely identifies a record in a table, while foreign key refers to a field in another table.

• Primary key is used to enforce data integrity and ensure uniqueness of records.

• Foreign key is used to establish a relationship between two tables.

• A table can have only one primary key, but multiple foreign keys.

• Example: In a database of students and courses, the student ID can be the primary key in the student table and a foreign key in the course table.

The pillars of OOPS are encapsulation, inheritance, and polymorphism.

• Encapsulation: It is the process of hiding the internal details of an object and providing a public interface for interacting with it.

• Inheritance: It allows a class to inherit properties and behaviors from another class, enabling code reuse and creating a hierarchical relationship.

• Polymorphism: It allows objects of different classes to be treated as objects of a common superclass, providing flexibility and e...read more

Inline functions are functions defined with the 'inline' keyword, which instructs the compiler to insert the function's code directly where it is called.

• Inline functions are typically used for small, frequently called functions to reduce the overhead of function calls.

• They can improve performance by eliminating the function call overhead.

• Inline functions are expanded by the compiler at the place where they are called, rather than being executed as a separate function.

• Example:...read more

Pointers in C++ are variables that store memory addresses of other variables or functions.

• Pointers are declared using an asterisk (*) before the variable name.

• Pointers can be used to access and manipulate the value stored at a particular memory address.

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

A dangling pointer is a pointer that points to a memory location that has been deallocated, leading to undefined behavior if accessed.

• Dangling pointers can occur when memory is freed but the pointer is not set to NULL.

• Accessing a dangling pointer can result in crashes or unexpected behavior.

• Example: int *ptr = new int; delete ptr; // ptr is now a dangling pointer