Programming Languages and Software Engineering

The inner printf('What this prints') prints the string and returns the character count (15). The outer printf with %d format specifier prints this return value, giving output '15'.

The maximum command line argument length is system-dependent. In the context of this question's reference system, the limit is 200 characters including spaces between arguments.

Trace the operations: x=20, y=35. First, 'x = y++ + x++' uses original values (35+20=55), then post-increments happen (y→36, x→56). Second, 'y = ++y + ++x' pre-increments first (y→37, x→57), then adds (37+57=94). Final output is x=57, y=94.

The Gang of Four (Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides) wrote the seminal 'Design Patterns: Elements of Reusable Object-Oriented Software' (1994), which established 23 classic design patterns and profoundly influenced modern OOP practices.

Assembly language does not have built-in type checking or type safety features. Since the hardware only sees raw bytes and registers, type safety cannot be enforced by the language itself, making 'devout prayer' a humorous but accurate choice.

Smalltalk, developed at Xerox PARC in the 1970s, featured the first just-in-time (JIT) compiler in 1983 (Peter Deutsch and Allan Schiffman). Java's JIT came much later (1990s), as did C#'s.

Forth, created by Chuck Moore in 1970, generates threaded code as its primary execution model. Threaded code is a technique where code consists of addresses of subroutines, making Forth distinct among languages for this characteristic.

Extreme Programming (XP) practices include pair programming, test-driven development, refactoring often, continuous integration, and frequent customer communication. 'Debugging is for wimps' contradicts XP's emphasis on testing and quality - it's clearly NOT a tenet of XP.

Java and JavaScript are entirely distinct languages with different designs, use cases, and execution environments. The name similarity was purely a marketing decision by Netscape to capitalize on the popularity of Java at the time.

Ruby is considered 'purely' object-oriented because it has no primitive types - everything, including integers, booleans, and nil, are objects. Java and C++ distinguish between objects and primitives (int, char, bool, etc.), making them less 'pure' in OOP terms.

Input validation is essential regardless of environment. Firewalls don't prevent application-level exploits, taint mode can be bypassed, and trusting any input source creates vulnerabilities. 'Never' is the only safe answer - any unvalidated input is a potential attack vector.

Comments improve code maintainability by explaining intent, complex logic, and design decisions. Options A (global variables), B (short names), and D (pointer arithmetic) are widely recognized as anti-patterns that hurt reusability and maintainability.

Guido van Rossum invented Python, Niklaus Wirth created Pascal, and Bjarne Stroustrup developed C++. Andrew S. Tanenbaum is a computer scientist known for creating MINIX (a Unix-like OS) and writing textbooks, but did not invent a programming language.

Coined by Fred Brooks in his book, "The Mythical Man-Month" refers to the fallacy that software project progress is perfectly scalable by adding more people, famously summarized as 'Brooks's Law': adding manpower to a late software project makes it later.

Hungarian Notation was invented by Charles Simonyi, a Hungarian-born Microsoft programmer. The naming convention encodes type information in variable prefixes (like 'lpsz' for 'long pointer to string zero-terminated'). The name directly honors Simonyi's Hungarian heritage.