IT Glossary
Key Terms To Know In The IT Industry
Quantum-safe Cryptography
Another term for quantum-resistant algorithms, emphasizing cryptographic approaches that aim to secure communication against the capabilities of both current and future quantum computers.
You will find this term commonly used in Cybersecurity/Quantum Computing
Quarantine
In cybersecurity, this refers to isolating suspicious files or software to prevent them from causing harm to the system, allowing users to examine them without risk.
You will find this term commonly used in Cybersecurity
Quartz
A job scheduling library that can be integrated into a wide variety of Java applications to perform tasks at scheduled times.
You will find this term commonly used in Software Development
Quasi-Experiment
A research design that attempts to establish a cause-and-effect relationship but does not rely on random assignment. In IT, it can be used to study the effects of new technologies or practices in environments where control is limited.
You will find this term commonly used in Research Methodology
Quasi-Experiment in Software Testing
A research design that approximates the control features of true experiments but does not involve random assignment to treatment or control. It is used in software testing to evaluate the effects of changes or new features under real-world conditions.
You will find this term commonly used in Software Testing
Quasi-Identifier
In data privacy, a quasi-identifier is a piece of information that is not itself unique or identifying, but when combined with other quasi-identifiers, can potentially identify an individual.
You will find this term commonly used in Data Privacy
Quasi-Random Sequence
A sequence of numbers that appear random but are generated by a deterministic process. Quasi-random sequences are used in various computational simulations and algorithms to approximate and solve complex problems.
You will find this term commonly used in Algorithms
Quasi-Static Channel
A communication channel whose properties change slowly compared to the rate of data transmission, allowing the channel's characteristics to be considered constant over short periods. It's relevant in wireless communications and networking.
You will find this term commonly used in Telecommunications
Quasi-Static Process
A process that occurs slowly enough for the system to remain in equilibrium throughout. In IT, it may refer to slow or incremental updates or changes that do not significantly disrupt system operations.
You will find this term commonly used in Systems Engineering
Quasi-Synchronous Communication
A communication method where data transmission is coordinated in time but does not require a strict synchronization mechanism. This method can be used in systems where precise timing control is difficult but some level of coordination is necessary.
You will find this term commonly used in Telecommunications
Quaternary Search
An algorithm that is a variation of binary search. Instead of dividing the search interval into two parts, quaternary search divides it into four parts, potentially reducing the number of steps needed to find the target value.
You will find this term commonly used in Algorithms
Quaternion
In computer graphics and robotics, quaternions are used for calculations involving three-dimensional rotations, offering advantages over other methods like Euler angles or matrices by avoiding issues like gimbal lock.
You will find this term commonly used in Computer Graphics
Qubit
The basic unit of quantum information in quantum computing, representing a two-state (or qubit) quantum system. Unlike classical bits, qubits can exist in multiple states simultaneously due to superposition.
You will find this term commonly used in Quantum Computing
Qubit Coherence Time
The duration over which a qubit maintains its quantum state before decohering, affecting the reliability and performance of quantum computations. Extending qubit coherence time is a major challenge in quantum computing development.
You will find this term commonly used in Quantum Computing
Qubit Entanglement
A quantum computing phenomenon where qubits become interconnected such that the state of one (no matter how far apart they are) can instantaneously affect the state of another. This property is key to many quantum computing algorithms.
You will find this term commonly used in Quantum Computing
Query
A request for data or information from a database, often written in a specialized language like SQL (Structured Query Language).
You will find this term commonly used in Databases
Query Expansion
A process used in information retrieval to improve search query results by automatically expanding the search query with additional words or phrases related to the original query, aiming to increase recall.
You will find this term commonly used in Information Retrieval
Query Flood Attack
A type of Denial-of-Service (DoS) attack where an attacker overwhelms a database or a server with a high volume of queries, causing it to slow down or crash, thereby denying service to legitimate users.
You will find this term commonly used in Cybersecurity
Query Interface
The component of a database management system or search engine that allows users to make requests for information. The interface can vary from graphical user interfaces (GUIs) for simplicity to command-line interfaces (CLIs) for more complex queries.
You will find this term commonly used in Databases/User Interface
Query Language
A query language is a computer language used to request and manipulate data stored in databases, enabling users to retrieve, insert, update, or delete information based on predefined criteria and commands.
You will find this term commonly used in Data Management, Database Management
Query Language Interface
The part of a database management system that allows users to interact with the database using queries written in a specific query language, such as SQL. This interface facilitates the retrieval, insertion, and manipulation of data.
You will find this term commonly used in Databases
Query Language Standards
Standards that define the syntax and semantics of query languages used in databases and information systems, such as SQL (Structured Query Language) for relational databases, ensuring interoperability and consistency across different systems and platforms.
You will find this term commonly used in Databases
Query Optimization
The process of enhancing the efficiency of queries in databases to reduce their execution time and resource consumption. It involves choosing the most efficient way to execute a query by analyzing various query plans.
You will find this term commonly used in Databases
Query Optimization Algorithm
Algorithms used in database management systems to find the most efficient way to execute a query. These algorithms consider various execution strategies and choose the one that minimizes resource usage and processing time.
You will find this term commonly used in Databases
Query Optimization Strategies
Techniques used to improve the efficiency of database queries. These strategies involve analyzing query execution plans, indexing, partitioning data, and adjusting queries to reduce processing time and resource consumption.
You will find this term commonly used in Databases
Query Optimization Techniques
Strategies and methods used to improve the performance of database queries, involving analyzing and choosing the most efficient way to execute a query based on the specific structure of the database and the data it contains.
You will find this term commonly used in Databases
Query Optimization Techniques in Databases
Methods used in database management to enhance the efficiency of query processing, involving index creation, query restructuring, and the use of algorithms to select the most efficient query execution plan.
You will find this term commonly used in Databases
Query Performance Tuning
The process of adjusting queries to optimize performance, including restructuring queries, adjusting database indexes, and configuring database management system settings to reduce response times and resource consumption.
You will find this term commonly used in Databases
Query Plan
In databases, a query plan is an ordered set of steps generated by the database management system to retrieve data based on a query. It outlines how tables are accessed, joined, and what operations are performed on the data.
You will find this term commonly used in Databases
Query Plan Analysis
The examination of the steps and resources involved in the execution of a SQL query by a database management system, aimed at identifying inefficiencies and potential optimizations to improve performance.
You will find this term commonly used in Databases
Query Plan Cache
A feature in some database management systems that stores the execution plan for recently executed queries. By reusing these plans for identical or similar queries, the database can reduce the time and resources needed to execute repeated queries.
You will find this term commonly used in Databases
Query Plan Visualization
A tool or feature in database management systems that graphically displays the steps the database engine will take to execute a query. This aids in understanding and optimizing complex queries.
You will find this term commonly used in Databases/Software Development
Query Rewriting
The process of transforming a given query into a different but semantically equivalent query, often to improve performance or utilize materialized views. This can be an important part of query optimization in databases.
You will find this term commonly used in Databases
Query String
A part of a URL that contains data to be passed to web applications. It typically includes field/value pairs after the "?" in the URL, used for passing data between client and server.
You will find this term commonly used in Web Development
Query String Encoding
A method used in web development to encode information in a URL within a query string. This is often necessary to ensure that special characters in the query string are properly interpreted by web servers and browsers.
You will find this term commonly used in Web Development
Query String Parameter
Part of the URL that assigns values to specified parameters. A query string starts with a "?" and is followed by pairs of parameter names and values connected by "&". It's often used in web development to pass state information between pages.
You will find this term commonly used in Web Development
Query String Parsing
The process of analyzing and extracting information from query strings in URLs, often used in web development to retrieve parameters and values passed through URLs for processing and navigation purposes.
You will find this term commonly used in Web Development
Query Throttling
A technique used to limit query executions in a database system to prevent overloading the system. This can help manage system performance and ensure that resources are evenly distributed among users and applications.
You will find this term commonly used in Databases
Query-by-Voice
A technology that allows users to perform searches or execute commands on a computer or mobile device using voice recognition. It's becoming increasingly popular in search engines, virtual assistants, and mobile apps for hands-free interaction.
You will find this term commonly used in Human-Computer Interaction
Queue
A linear data structure that follows the First In, First Out (FIFO) principle. A good example is a line of requests waiting to be processed by a computer program.
You will find this term commonly used in Data Structures
Queue Interface
In programming, specifically in the Java language, the Queue interface is part of the Java Collections Framework. It represents a collection designed for holding elements prior to processing, adhering to a FIFO (First In, First Out) principle.
You will find this term commonly used in Software Development
Queue Length
In computing, the number of items (such as processes, tasks, or packets) waiting in a queue to be processed. High queue lengths can indicate congestion or high demand for resources, affecting system performance.
You will find this term commonly used in Computer Science
Queue Length Prediction
Techniques used to forecast the length of queues in computing and networking environments, aiding in resource allocation, system scaling, and performance optimization.
You will find this term commonly used in Computer Science/Networking
Queue Management Algorithm
Algorithms designed to manage data packets in networking devices based on priority, ensuring efficient processing and transmission. These algorithms play a crucial role in managing network traffic and implementing QoS policies.
You will find this term commonly used in Networking
Queue Management System (QMS)
A system designed to manage and reduce queues, or waiting lines, through process optimization and by providing real-time data on queue lengths and wait times, commonly used in customer service, healthcare, and IT support.
You will find this term commonly used in Operations Management
Queue Management Systems (QMS) in IT
Systems used to manage and optimize queues in IT environments, such as in help desk operations, server processing tasks, or network traffic management, to improve efficiency and reduce waiting times.
You will find this term commonly used in IT Service Management
Queueing Networks
Models that represent systems in which jobs pass through a network of service stations, each of which can queue and process jobs in various ways. These models are used to analyze and predict system performance in various IT and operational environments.
You will find this term commonly used in Operations Research
Queueing Theory
The mathematical study of waiting lines, or queues. In IT, it's applied to analyze and predict queue lengths and waiting times in network traffic, computer systems, call centers, etc., to improve service efficiency.
You will find this term commonly used in Operations Research
Quick Access Memory (QAM)
A hypothetical or conceptual type of memory that offers extremely fast data access speeds, potentially useful in high-performance computing applications or systems requiring rapid data retrieval and processing capabilities.
You will find this term commonly used in Computer Architecture
Quick Access Toolbar
A customizable toolbar that contains a set of commands that are independent of the tab on the ribbon that is currently displayed. It provides easy access to commonly used commands.
You will find this term commonly used in Software/User Interface
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