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Articles on Trending Technologies
Technical articles with clear explanations and examples
Errors in C/C++
In C/C++, an error occurs due to an invalid operation performed by the user. The error normally stops the program execution until it is fixed. So, the error should be removed before compilation and execution. Types of Error in C/C++ Following is the list of errors occur in C/C++ programming: Syntax Error Run-Time Error Linker Error Logical Error Semantic Error In this article, we will see the implementation of error in C/C++ programs. Syntax Error The syntax error ...
Read MoreIterate through elements of Java LinkedHashSet
LinkedHashSet is a part of Java's Collection Framework. It is a type of Set that keeps the order of elements the same as they were added. It uses a combination of a hash table and a linked list to store elements.Our task is to traverse/iterate through the elements of a LinkedHashSet in Java. Let's look at some scenarios to understand the problem better: Scenario 1 Input: {1, 2, 3, 4, 5} Output: 1 2 3 4 5 Explanation: The LinkedHashSet contains the elements 1, 2, 3, 4, and 5. When we iterate through it, we get the elements in the ...
Read MoreCheck if a Java HashSet Collection contains another Collection
HashSet is a class in Java that implements the Set interface. It is used for storing unique elements. Our task is to check if a HashSet contains another collection in Java. Let's look at some scenarios to understand the problem better: Scenario 1 Input: {1, 2, 3, 4, 5} Collection to check: {2, 3} Output: true Explanation: The HashSet contains all the elements of the collection {2, 3}. Scenario 2 Input: {1, 2, 3, 4, 5} Collection to check: {6, 7} Output: false Explanation: The HashSet does not contain all the elements of the collection {6, 7}. Checking ...
Read MoreArea of a square from diagonal length in C++
A diagonal of a polygon is the line joining two vertices that are not adjacent to each other. The formula for calculating the area of a square with diagonal length is a2 = d2 / 2, where a and d are the side and diagonal length of the square, respectively. The visual representation of the derivation of the formula is given below: Here are some example scenarios to calculate the area of a square from the diagonal length using the above formula: Scenario 1 Input: d = 10 Output: 50 Explanation: Using the formula: area = ...
Read MoreArea of a triangle inside a parallelogram in C++
The area of a triangle is given as (base * height) / 2, and the area of a parallelogram is base * height. For calculating the area of the triangle inside the parallelogram, we divide the area of the parallelogram by 2, i.e., (base * height) / 2, where the base and the height of the parallelogram are given. Here are some example scenarios to calculate the area of a triangle inside a parallelogram using the above formula: Scenario 1 Input: base = 10, height = 8 Output: 40 Explanation: Using the formula: Area ...
Read MoreArithmetic Mean in c++?
An arithmetic mean is the average of all the given numbers, which is calculated by summing all the numbers and dividing this calculated sum by the total number of elements. The formula for calculating the arithmetic mean is: $$ \bar{x} = \frac{1}{n} \sum_{i=1}^{n} x_i = \frac{x_1 + x_2 + x_3 + \cdots + x_n}{n} $$ Here, we are given an array of integers and our task is to calculate the arithmetic mean of these numbers using the above formula: Scenario 1 Input: num = 2, 7, 4, ...
Read MoreArray Transformation in C++
Array transformation is a popular coding question asked in technical assessments and interviews. In this article, we will discuss the problem of array transformation with example testcases, the algorithm to solve it, and provide a C/C++ implementation. Array Transformation Based on Local Maxima and Minima In this problem, you are given an array of integers arr[] of size N. Every day the array undergoes a transformation which can be defined as follows: The first and last elements of the array are not transformed. For every other element arr[i] in the array, where 0 < i < N-1, ...
Read MoreCheck if a particular key exists in Java LinkedHashMap
LinkedHashMap is a data structure in Java that is part of the Java Collections Framework. It is very similar to HashMap.It stores key-value pairs, where each key is unique, and it allows null values, but allows only one null key. The main difference is that the LinkedHashMap returns the elements in the order they were inserted. This is because it maintains a linked list with entries in the map, which helps it to retain the insertion order of the elements. Our task is to check if a particular key exists in a LinkedHashMap in Java. Scenario 1 Following is a ...
Read MoreAdd Bold Tag in String in C++
A string is a sequence of characters, like words, numbers, or sentences, enclosed in double quotes ("). The given task is to add a closed pair of HTML bold tags around a string using C++.Let us understand this with an example: Input: abc Output: abc Add Bold Tag in String in C++ To add bold tags to a string in C++, we use string concatenation. This is the process of joining two or more strings together to form a new string. In C++, this can be done using the '+' operator. To wrap a string with bold ...
Read MoreAdd two numbers using ++ operator in C++.
Adding two numbers is a basic arithmetic operation, where we simply combine their values to get the total. The given task is to add two numbers using the "++" operator in C++. Let's understand this with an example: Scenario 1 // Adding two numbers using '+' operator Input: a = 7, b = 3 Output: 10 Explanation: a + b => 7 + 3 = 10 Scenario 2 // Adding two numbers using '++' operator Input: a = 7, b = 3 Output: 10 Explanation: a + b => 7 + 1 + ...
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