Interview Questions Answers in Core Java, Linux General, Linux Commands, Database Management, JDBC, SQL PLSQL, SQL Server, Data Structures, Unix Commands, OOPS, C++ General, ASP.NET, C, Electronics Communications

Question { 6672 }

What are command line arguments?

Answer

Command-line arguments are inputs passed to the program at runtime via argc and argv in the main function.

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Question { Accenture, 6036 }

What is Normalization?

Answer

Normalization is the process of structuring a database to minimize redundancy and improve efficiency. It involves organizing data into tables and defining relationships between them.

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Question { 11215 }

What is a stored procedure ?

Answer

A stored procedure is a precompiled block of PL/SQL code stored in the database, which can be executed to perform a specific task.
Syntax Example:
CREATE OR REPLACE PROCEDURE IncreaseSalary(emp_id NUMBER, increment NUMBER) AS
BEGIN
UPDATE employees
SET salary = salary + increment
WHERE id = emp_id;
END;
To execute:
EXEC IncreaseSalary(101, 500);

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Question { 11215 }

What is a stored procedure ?

Answer

A stored procedure is a precompiled collection of SQL statements stored in the database. It improves performance and security by reducing query execution time.
Example:
CREATE PROCEDURE GetUsers()
AS
BEGIN
SELECT * FROM Users;
END;

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Question { 8120 }

What are primary keys and foreign keys?

Answer

• Primary Key: A unique identifier for a table’s record (e.g., id in a table).
• Foreign Key: A column in a table that refers to the primary key of another table, establishing a relationship between tables.

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Question { Keane India Ltd, 23351 }

What is a data structure?

Answer

A data structure is a type of storage format that specifies how information is arranged, saved, and worked with.
Trees, graphs, and arrays are a few well-known data structures.

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Question { 9039 }

what is shell?

Answer

The program which serves as an interface between the user and the system called a shell. It is the layer of programming that understands and executes the commands a user enters. In some systems, it’s also called a command interpreter.

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Question { IBM, 13317 }

What is a linked list?

Answer

Similar to an array, a linked list is a linear data structure where the components aren't always kept together.
In essence, it is a series of nodes that form a chain-like structure by pointing in the direction of the next node.

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Question { Christ University, 86863 }

What is the difference between = and == in C?

Answer

 =: Assignment operator (e.g., x = 10).
 ==: Equality comparison operator (e.g., if (x == 10)).

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Question { 20100 }

what is an array

Answer

A collection of items kept at consecutive memory regions is frequently referred to as an array.
The items that are kept are all of the same kind.
It arranges data in a way that makes it simple to search for or sort similar values.

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Question { IBS, 10392 }

What is the difference between <%#%> and <%=%>?

Answer

While === examines both equality and data type—that is, a value must be of the same type—the == operator merely checks equality.

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Question { Tech Mahindra, 15347 }

what is c?

Answer

C is a general-purpose, procedural programming language that supports structured programming. It is widely used for system software and application development.

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Question { Tech Mahindra, 15347 }

what is c?

Answer

C++ is a general-purpose, high-level programming language used for system and application development. Developed by Bjarne Stroustrup at Bell Labs in 1983, it builds upon the C language while introducing object-oriented features. It supports multiple paradigms, including procedural, functional, and generic programming. This is one of the most commonly asked C++ interview questions.

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Question { 7971 }

what is the difference between c and c++

Answer

• C: Procedural programming language, no support for OOP, limited standard library.
• C++: Supports OOP, templates, and STL; more modern syntax and features.

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Question { 4430 }

what is a function prototype?

Answer

A function prototype declares the function's name, return type, and parameters without providing the actual implementation.

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