Woven’s online coding challenges directly assess your programming language skills in the context of job-related problem-solving situations. These questions are geared towards front-end and full-stack developer positions. In javascript, variable names should not start with numerals (0-9). Instead, they must begin with a letter or underscore character. Also, variables in javascript problem solving questions  have different scopes.

Strings

Strings are used in programming to represent text that can be interpreted by a computer. They are often used to convey information from the programmer to the computer, or vice versa. They are also useful in human-readable files, such as configuration files.

In javascript, a string is an array of characters enclosed in quotes. Whenever a code program uses a string literal, it creates a new instance of the String class. The String class has methods that appear to modify strings, but they cannot be modified. The string is immutable, and the only way to change it is to replace it with another string.

A common coding interview question involves finding the longest common prefix of two strings. This is a tricky problem to solve because it requires comparing the length of each string to its original length. In addition, it can be difficult to find an optimal solution to this problem using recursion. Instead, it is better to use an iterative approach.

Arrays

Arrays are a useful data structure in computer programming. They allow programmers to store large amounts of similar data in a single variable, making it easier for them to sort and search the data. Moreover, they help reduce the number of times a variable is accessed and therefore make a program run faster. Moreover, they have contiguous memory locations, which makes them efficient for storage.

The array data structure can store values of any type, but the elements must be the same type (either primitive or object). It is also immutable, meaning that once it has been created, it cannot be changed. This is an advantage over the mutable list data structure, which allows changes to be made at any time.

Whether you are preparing for a Javascript coding interview or just want to practice your skills, these 20 array problem-solving questions will challenge and test your knowledge of this essential data structure. To learn more, consider taking a comprehensive data structure and algorithm course like Data Structures and Algorithms: Deep Dive Using Java.

Functions

Functions in JavaScript are reusable sets of statements that perform a task or calculate a value. They are passed one or more inputs and return an output. Using functions can reduce repetition in a program and make it easier for others to understand the code. They can also help organize a large program into smaller pieces and isolate different parts of the code.

It is recommended that you use functions as much as possible, as they are more efficient than other methods of writing code. For example, you can write a function that takes two inputs and concatenates them to generate a string. The function could then return the string to the calling program.

Another benefit of using functions is that they are compact. They eliminate the need for keywords, curly braces, and parenthesis in some cases. Moreover, they are easy to read and maintain. Additionally, they are useful in writing recursive programs. However, recursive functions are not supported by all browsers.

Variables

Variables are a fundamental aspect of Javascript that is important to understand. They are used to store data that can be accessed in different parts of the program. They also allow for code re-use.

There are two types of variables in JavaScript: global and local. A global variable is visible throughout the entire program, while a local variable is only visible within a function in which it is declared. Variable names must begin with an alphabetical letter, a digit, or an underscore symbol. They must also be in camel case, like message, yourAge, and myName.

Using variables is an effective way to organize your code. However, it’s best to minimize mutable states. This is why it’s important to choose the right declaration keyword: var, let, or const. In most cases, a good rule of thumb is to use let for variables that can be reassigned. This will prevent errors from accidental renaming of the variable.