Interview Questions Answers in Database Management, MQSeries, Engineering AllOther, SQL PLSQL, C, Oracle General, Core Java, Data Science, C Sharp, Databases AllOther, SQL Server, JavaScript

What is a Queue?

Answer

A linear data structure that executes operations in FIFO order is called a queue.
Rather than a stack in a queue, the elements that have been added the least recently are eliminated first.

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Question { 7840 }

what is LINUX?

Answer

Linux is an open-source operating system kernel that forms the basis for various Linux distributions.

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Question { Ericsson, 11420 }

what is sql.

Answer

SQL (Structured Query Language) is a language used to interact with relational databases. It allows users to query, insert, update, and delete data.

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Question { 6257 }

what is a stack

Answer

A linear data structure that executes operations in Last In First Out (LIFO) order is referred to as a stack.
Only the topmost element in a stack can be accessed, followed by the bottom element.

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Question { IBM, 11227 }

What is the difference between SQL and PLSQL

Answer

• SQL (Structured Query Language):
o Used to interact with databases (e.g., querying, inserting, updating data).
o Declarative in nature.
• PL/SQL (Procedural Language/SQL):
o Procedural extension of SQL in Oracle.
o Supports loops, conditions, and error handling.
o Used for creating functions, triggers, and stored procedures.

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Question { 2053 }

What is PL/SQL ?

Answer

PL/SQL refers to Procedural Language/Structured Query Language. It is a programming language extension of SQL that allows you to write procedural code, such as loops, conditional statements, exception handling, and SQL statements. PL/SQL is mainly used for developing database applications and stored procedures within Oracle Database.

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Question { Amazon, 1538 }

What is the difference between delete and delete[]

Answer

• delete: Frees memory allocated for a single object.
• delete[]: Frees memory allocated for an array of objects.

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Question { 932 }

What are generators in Python?

Answer

Generators in Python are a special type of function that return an iterator and allow you to iterate through a sequence of values lazily, meaning they produce values one at a time and only when requested. Instead of using return, generators use the yield keyword to return values. This makes generators memory-efficient, especially for large datasets, as they generate values on the fly rather than storing the entire sequence in memory.

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Question { Cognizant, 1678 }

what is a structure in c#

Answer

A structure is a user-defined data type that groups variables of different types under one name.

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Question { 1768 }

What is a Database?

Answer

A database is an organized collection of data that allows for easy access, retrieval, and management. It is used to store, manage, and process data efficiently.

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Question { HPCL, 1830 }

Explain different types of Normalization.

Answer

• 1NF (First Normal Form) – Eliminates duplicate columns, ensures atomicity.
• 2NF (Second Normal Form) – Removes partial dependencies.
• 3NF (Third Normal Form) – Removes transitive dependencies.
• BCNF (Boyce-Codd Normal Form) – Ensures every determinant is a candidate key.

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Question { 1639 }

What is the use of history object?

Answer

From the current page or another page, you can navigate back and forward to previous pages using a browser's history object. History objects can be used in three different ways.

The previous page is loaded using history.back().
The next page is loaded using history.forward().

heritage.go(number) - For forward motion, the number might be positive; for backward motion, it can be negative. The specified page number loads.

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Question { 1710 }

Difference between Client side JavaScript and Server side JavaScript?

Answer

Client-side The fundamental language and predefined objects needed to operate JavaScript in a browser are included in JavaScript. The HTML pages directly embed the client-side JavaScript. This script is interpreted at runtime by the browser.

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Question { 1909 }

What is JavaScript?

Answer

JavaScript is a language for writing scripts. The Java language is not the same as this. The language is cross-platform, lightweight, and object-based. Client-side validation makes extensive use of it. The web browser's JavaScript code must be translated by the JavaScript Translator, which is built within the browser.

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Question { 1909 }

What is JavaScript?

Answer

JavaScript is a lightweight, interpreted, and dynamic programming language used for creating interactive web pages. It is primarily used for front-end development but can

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