JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year WEB PROGRAMMING Previous Question Paper (September - 2021 - R18)

Arithmetic operators are used to perform mathematical calculations on numerical values. These include addition (+), subtraction (-), multiplication (*), division (/), modulus (%), and exponentiation (**). For example, if a = 10 and b = 3, then a + b results in 13, a * b results in 30, and a % b results in 1.

String operators are used to manipulate text data. The primary string operator is concatenation (+), which joins two or more strings together. In some languages, the assignment operator (+=) is also used to append a string to an existing variable. For example, if string1 = "Hello" and string2 = "World", then string1 + " " + string2 results in "Hello World".

Scripting languages are designed for integrating and communicating with other software components. Their key characteristics include:

• Interpreted Execution: Unlike compiled languages, code is executed line-by-line by an interpreter, which facilitates rapid development and debugging.
• Dynamic Typing: Variables do not require explicit type declarations; types are determined at runtime, allowing for greater flexibility.
• Ease of Use: They typically feature a simpler syntax and high-level abstractions, making them accessible for quick automation and web development tasks.
• Platform Independence: Most scripting languages are cross-platform, meaning they can run on different operating systems provided the appropriate interpreter is installed.
• Embedded Capability: They are frequently embedded within larger host applications to provide custom functionality or to automate repetitive tasks.
• Automatic Memory Management: They often include built-in garbage collection, reducing the burden on the programmer to manually manage memory allocation.