Difference between Keyword and Identifier in C - GeeksforGeeks (2024)

Check whether the given string is a valid identifier

Given a string str, the task is to check if the string is a valid identifier or not. In order to qualify as a valid identifier, the string must satisfy the following conditions: It must start with an either underscore(_) or any of the characters from the ranges ['a', 'z'] and ['A', 'Z'].There must not be any white space in the string.And, all the s

Difference between Data Driven Testing and Keyword Driven Testing

1. Data-Driven Testing :Data-driven testing or DDT is also named Parameterized testing. DDT is a process of testing software that is used to test the computer Software by applying some conditions like verified inputs. For testing the software various methods are used and every methodology differs from the other for maintaining accuracy. DDT focuses

Difference between Difference Engine and Analytical Engine

Introduction: The development of computing technology has a rich history, with many inventions and innovations leading to the creation of the modern computer. Two such machines, the Difference Engine and Analytical Engine, were created by the English mathematician and inventor Charles Babbage in the 19th century. While these machines share some sim

Difference between Voltage Drop and Potential Difference

Voltage Drop is defined as the decrease in the electric potential along the path of current that is flowing in an electric circuit. Voltage drop can be assigned at each point in the electric circuit that is proportional to the electrical elevation. The amount of energy delivered per second to any component in the circuit is equal to the voltage dro

Difference Between Electric Potential and Potential Difference

The flow of electric charges is known as electricity, and it is responsible for producing electric current. An important word associated with electricity is electric potential. A potential difference is required to create the flow of electrons and hence, produce electricity. Before understanding the difference between electric potential and potenti

Difference and Similarities between PHP and C

PHP is a server-side scripting language designed specifically for web development. It can be easily embedded in HTML files and HTML codes can also be written in a PHP file. The thing that differentiates PHP from a client-side language like HTML is, PHP codes are executed on the server whereas HTML codes are directly rendered on the browser. C is a

Similarities and Difference between Java and C++

Nowadays Java and C++ programming languages are vastly used in competitive coding. Due to some awesome features, these two programming languages are widely used in industries as well as comepetitive programming . C++ is a widely popular language among coders for its efficiency, high speed, and dynamic memory utilization. Java is widely used in the

Difference between Time Tracking and Time and Attendance Software

Time tracking and time and attendance software are tools that help businesses track the time that employees spend on tasks and their attendance records. These tools can help businesses automate their time tracking processes, reduce errors and inaccuracies, and ensure that employees are paid accurately for the time they work. Time tracking software

Difference Between Single and Double Quotes in Shell Script and Linux

Single quotes and double quotes are both functional in Linux while working with shell scripts or executing commands directly in the terminal but there is a difference between the way the bash shell interprets them. Single quotes: Enclosing characters in single quotation marks (') holds onto the literal value of each character within the quotes. In

Difference Between Monophyletic and vs Paraphyletic and vs Polyphyletic

In phylogeny, a taxon is a collection of organisms. Defining taxa makes it simpler to classify and identify creatures while also helping us to understand how they relate to one another. Based on these traits, taxa are developed. While some taxa are made up of unrelated creatures, others contain related species. Taxa classify descendants and ancesto

Difference Between Grin And Smile And Smirk

Difference Between Grin And Smile And Smirk: Emotions are expressed by facial expressions. Facial expressions are considered an as important aspect of non-verbal communication. Facial expressions consist of various different body moments such as moving lips upward or downward, movement of raising the eyebrows, and giving the wide smile while descri

Difference Between Store‑and‑Forward Switching and Cut‑Through Switching

Switching is a technique to transmit data between networks using switches that connect multiple LANs. Switches forward data packets based on MAC addresses, efficiently using bandwidth and reducing collisions. The three main types are: Circuit Switching: Dedicated path for the entire connection, used in traditional telephony.Message Switching: Entir

Difference between Stop and Wait protocol and Sliding Window protocol

Both the Stop and Wait protocol and the Sliding Window protocol are the techniques to the solution of flow control handling. The main difference between the Stop-and-wait protocol and the Sliding window protocol is that in the Stop-and-Wait Protocol, the sender sends one frame and waits for acknowledgment from the receiver whereas in the sliding wi

Difference between Black Box and White and Grey Box Testing

1. Black Box Testing : Black box testing is a type of software testing in which the functionality of the software is not known. The testing is done without the internal knowledge of the products. It is also called Functional testing. Black-box testing focuses on software’s external attributes and behavior. This type of testing looks at an applicati

Difference between ++*p, *p++ and *++p

Predict the output of following C programs. C/C++ Code // PROGRAM 1 #include <stdio.h> int main(void) { int arr[] = {10, 20}; int *p = arr; ++*p; printf("arr[0] = %d, arr[1] = %d, *p = %d", arr[0], arr[1], *p); return 0; } C/C++ Code // PROGRAM 2 #include <stdio.h> int main(void) { int arr[] = {10, 20}; int *p = arr; *p++; pri

Difference between sh and bash

bash and sh are two different shells of the Unix operating system. bash is sh, but with more features and better syntax. Bash is “Bourne Again SHell”, and is an improvement of the sh (original Bourne shell). Shell scripting is scripting in any shell, whereas Bash scripting is scripting specifically for Bash. sh is a shell command-line interpreter o

Difference Between DOS and Windows

DOS: DOS stands for Disk Operating System, which is an operating system that was popular till 1995 in the IBM PCs. It is a single-tasking OS i.e., it can perform one task at a time. It is based on a command-line interface where we have to provide instruction to the computer in commands form. It runs from hard disks,floppy disk or any other storage

What's difference between MMU and MPU?

Literally speaking, MMU is 'Memory Management Unit' while MPU is 'Memory Protection Unit'. Both of these are specialized hardware that is used by CPU for memory handling. MMU is used for many functions primarily Virtual Memory (i.e. translation of virtual address to physical address) and memory protection. But MPU is used for memory protection only

What’s difference between “array” and “&array” for “int array[5]” ?

If someone has defined an array such as “int array[5]”, what’s the meaning of “array” or “&array”? Are they both same or are they different? You might be tempted to think that they both would point to the very first element of the array i.e. they both will have same address. Let us find out! To check this, the very first thing that comes to min

Difference between Ping and Traceroute

In computer networks, data is sent in small blocks known as packets. Each packet is transmitted individually and may also follow a different route to reach the destination. Once all these packets of the original message reach the destination, they are re-assembled to form the original message. But, sometimes, it may happen that the webserver is dow

Difference between strlen() and sizeof() for string in C

sizeof() Sizeof operator is a compile time unary operator which can be used to compute the size of its operand. The result of sizeof is of unsigned integral type which is usually denoted by size_t.sizeof can be applied to any data-type, including primitive types such as integer and floating-point types, pointer types, or compound datatypes such as

Difference Between Apache Kafka and Apache Flume

Apache Kafka: It is an open-source stream-processing software platform written in Java and Scala. It is made by LinkedIn which is given to the Apache Software Foundation. Apache Kafka aims to provide a high throughput, unified, low-latency platform for handling the real-time data feeds. Kafka generally used TCP based protocol which optimized for ef

Difference Between Constants and Variables in C

The constants and variables in C are both used to store data. So it is essential to know the difference between the variables and constants in C so that we can decide which one to use based on the situation. In this article, we will discuss the basic difference between a constant and a variable in C language. Variables in C A variable in simple ter

Difference between RFID and Barcode

1. Radio-Frequency Identification (RFID) : It is an acronym for “radio-frequency identification” and refers to science whereby digital data encoded in RFID tags or smart labels are captured with aid of a reader by radio waves. In RFID data from a tag or label are captured via a gadget that stores data in a database. RFID, however, has quite a few b

Difference Between Correlational and Experimental-Research

Non-experimental research methods like correlational research are used to look at correlations between two or more variables. Positive or negative correlations suggest that as one measure rises, the other either rises or falls. To study the cause-and-effect relationship between various variables, experimental research manages one or more of them. R

Difference between Tree Topology and Bus Topology

1. Tree Topology: Tree topology is a type of network topology in which the nodes are arranged in the design of a tree. In tree topology, branching cable starts from the node at the head top known as the root node. The branching cable having no loops connect the root with all other nodes in hierarchical manner for communication. Tree topology is mor

Difference Between Length and Capacity in Java

Length and capacity are two different things in Java. Length basically increases when characters are appended to the string whereas the capacity increases when the current capacity is exceeded by a new length. length () method is a part of the Java String class. It is used to find the length of the string. It basically counts the number of characte

Difference between CloudMe and Wuala

1. CloudMe : CloudMe is a file storage service which is provided by CloudMe AB. It provides file synchronization, cloud storage and client software. It was founded by Daniel Arthursson in 2011. Initially it was named iCloud but later Apple acquired that name. It offers 3 GB free storage space. It provides limited storage space for premium accounts.

Difference between Agile and Kanban

1. Agile : Agile software development is a newer approach of software development. It is based on continuous iterative development approach throughout SDLC (Software Development Life Cycle) so that continuous changes are made according to immediate feedback/requirements and at last it results a good and effective software product which gives more s

Difference between grep and fgrep command

The grep filter searches a file for a particular pattern of characters and displays all lines that contain that pattern. The fgrep filter searches for fixed-character strings in a file or files. Syntax of grep command: grep [options] pattern [files] Syntax of fgrep command: fgrep [options] pattern [files] The main difference between both commands i