Functions and Variables in C Programming

 Variables can be passed to a C function as arguments, and the function can access these variables as function parameters. After processing information, the function can return a value to the main C program. The question here is, can a function return its local variable to the main program? There are different possibilities; here is one of these. Can you guess the output of the code given below? Comment the reason why you think the output you are providing is the right one.

Created by: Nancy N

29-Apr-2025

C keyword or not?

 Which of the following is NOT a C programming language keyword?

a) auto

b) external

c) sizeof

d) volatile

Created by Nancy N

@18:24 27-Apr-2025

What is a Self-Refrential structure?

 Self-referential structures are used in C and C++ programming. A self-referential structure is a structure that contains a pointer to itself, or you can say a pointer to a variable of the same type. A self-referential structure can have one or more pointer variables pointing to the same type. 

Example of simple structure:

Example of self-referential structure:

Here, nptr is a pointer variable of type struct person, and nptr is a variable in the same datatype struct person. 

In a later post, we will see how the self-referential structures are useful.

Created by Nancy K A N

@00:59 26-Apr-2025

Interesting facts about JAVA - 3

 const is a Java reserved word with no assigned semantics to it. So, you cannot create an identifier with the name const. It is not a keyword, so it cannot be used in a Java program. It is just a prohibited word. A word that has no meaning in Java but is forbidden for any kind of use. Funny, isn't it?

If you declare to as a local variable:

On compilation, you get an error:

If you declare it as an instance variable:

On compilation, you get the following error:

By: Nancy K A N

@9:48 25-Apr-2025

REST - 1

 Which protocol will you use in a REST service?

a) SOAP

b) JMS

c) HTTP

d) SMTP

e) FTP

Design Patterns - 1

 There are three types of Gang of Four (GoF) Design patterns

1. Creational

2. Structural

3. Behavioral

Can you find which of these is a creational design pattern?

a) Facade

b) Strategy

c) Factory

d) Observer

Created and posted by Nancy N.

@15:40 pm GMT

Object Oriented Programming Languages

 Which of the following is/are not an Object Oriented Programming (OOP) language(s)?

a) JavaScript

b) C++

c) COBOL

d) C