TPAC Packaging India Interview Questions and Answers

C++ is a high-level programming language used for developing system software, application software, device drivers, and video games.

• C++ is an extension of the C programming language.

• It supports object-oriented programming concepts like classes, inheritance, and polymorphism.

• C++ is used in developing operating systems, browsers, databases, and more.

• Examples of popular software written in C++ include Adobe Photoshop, Microsoft Office, and MySQL.

• C++ is known for its performance ...read more

Call by value and call by reference are two ways of passing arguments to a function in programming.

• Call by value passes a copy of the value to the function.

• Call by reference passes the memory address of the value to the function.

• Changes made to the parameter inside the function affect the original value in call by reference.

• In call by value, changes made to the parameter inside the function do not affect the original value.

Virtual function is a function in base class that is overridden in derived class.

• Virtual functions allow polymorphism in C++.

• They are declared in base class with 'virtual' keyword.

• They are overridden in derived class with 'override' keyword.

• They are called based on the object type at runtime.

SQL query features include SELECT, FROM, WHERE, GROUP BY, ORDER BY, JOIN, and more.

• SELECT: used to select specific columns from a table

• FROM: used to specify the table to retrieve data from

• WHERE: used to filter data based on a condition

• GROUP BY: used to group data based on a column

• ORDER BY: used to sort data based on a column

• JOIN: used to combine data from multiple tables

• Other features include subqueries, aggregate functions, and more

Abstract class is a class that can have both abstract and non-abstract methods, while interface only has abstract methods.

• Abstract class can have constructors, while interface cannot

• A class can implement multiple interfaces, but can only inherit from one abstract class

• Abstract class can have instance variables, while interface cannot

• Abstract class is used when there is a need for a common base class for multiple related classes, while interface is used when there is a need fo...read more

Creating a drop-down in Angular

• Use the element in HTMLUse *ngFor directive to loop through optionsBind the selected value to a variable using [(ngModel)]Use *ngIf directive to conditionally show/hide the drop-down

OOPs is a programming paradigm that focuses on objects and their interactions. SOLID is a set of principles for designing maintainable software.

• OOPs stands for Object-Oriented Programming, which is a programming paradigm that organizes code around objects and their interactions.

• SOLID is an acronym for five principles: Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.

• The Single Responsibility Principle states that a class...read more

Stored procedures are precompiled SQL statements stored in a database, while joins are used to combine rows from different tables.

• Stored procedures are used to improve performance, security, and code reusability.

• Joins are used to retrieve data from multiple tables based on a related column between them.

• There are different types of joins: inner join, left join, right join, and full outer join.

• Example of a stored procedure: CREATE PROCEDURE GetEmployees AS SELECT * FROM Employe...read more