The structure of a compiler is organized into multiple phases, each responsible for transforming source code step by step into machine code. [A.] At a broad level, compilers consist of several phases – (a.) Lexical Analysis Phase (b.) Syntax Analysis Phase (c.) Semantic Analysis Phase (d.) Intermediate Code Generation (e.) Read more…
History Early Beginnings (1940s–1950s) The history of compilers started in the late 1940s with early ideas for automatic programming. In 1949–1951, Heinz Rutishauser proposed Superplan, a high-level language with an automatic translator, refined by Friedrich L. Bauer and Klaus Samelson. Grace Hopper coined the term “compiler” in 1952 for her Read more…
Introduction When designing digital systems, especially for the first time, such as calculators, computers, and communication devices, we often start with complex Boolean expressions that involve several variables and gates. These expressions can be simplified using specific techniques later, allowing the same logical function to be performed using fewer gates Read more…
History The concept of flip-flops dates back to the early days of electronics. The idea behind bistable circuits (flip-flop) dates back to early 20th-century electronics. The first practical bistable multivibrator flip-flop circuit was invented by William Eccles and F. W. Jordan in 1918, and it was called the Eccles–Jordan trigger Read more…
Definition Visual display of information means presenting data in graphical or visual form so that it is easy to understand and analyze. Characteristics Visual displays such as text, tables, graphs, bars, lines, and areas help present data clearly. Tableau provides various chart types like bar charts, line charts, pie charts, Read more…
Tableau provides a user-friendly drag-and-drop interface designed for data visualization and analysis. Below is a breakdown of its key components. Tableau’s intuitive UI makes it easy to analyze data using Sheets, Dashboards, and Stories. The Menu, Toolbar, and Data Window help manage data and create impactful visualizations. Understanding data types Read more…
Tableau Basic Filters Filters in Tableau are used to restrict or limit data based on user-defined conditions displayed in a visualization. Basic filters in Tableau help users control and refine the data displayed in visualizations. They are essential for effective data analysis and dashboard creation. A filter removes unwanted data Read more…
Types of Built-In Functions Tableau provides several types of built-in functions that are used to manipulate and analyze data in calculated fields. Tableau functions help in data transformation, calculation, and analysis. These functions are categorized into:- Number Functions (Math operations) String Functions (Text manipulation) Date Functions (Date calculations) Logical Functions Read more…
Firewalls are critical for securing Linux systems by controlling incoming and outgoing network traffic based on predefined rules. A firewall is a security system that monitors and controls network traffic. Linux firewalls operate at the kernel level using Netfilter, a packet-filtering framework. Firewalls perform filtering i.e., It blocks or allows Read more…