Hiring guide for Toi Engineers

Toi Developer Hiring Guide

Toi is an imperative, procedural programming language designed to be easy to use and understand. It was developed in the early 1980s by a team of researchers at the University of California, Berkeley. Toi is similar to BASIC, but it has some important differences, such as its use of structured programming techniques. Toi is still in use today, and it is popular among hobbyists and students. Sources: [1] https://en.wikipedia.org/wiki/Toi_(programming_language) [2] https://web.archive.org/web/20160304050038/http://www.cs.berkeley.edu/~taylor/toi/ [3] https://doi.org/10.1145/89250.89252

Ask the right questions secure the right Toi talent among an increasingly shrinking pool of talent.

First 20 minutes

General Toi app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Toi application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you describe the basic structure of a Toi program?
A Toi program is composed of a series of statements. Each statement is either an expression, a declaration, or a control flow statement. Expressions include operations such as addition or multiplication, function calls, or variable references. Declarations introduce new variables or functions. Control flow statements direct the execution of the program, such as if-else statements, loops, or return statements.
What are the basic data types in Toi?
The basic data types in Toi are integers, floating-point numbers, booleans, strings, and null. Toi also supports composite data types such as arrays and objects.
Describe the difference between a function declaration and a function expression in Toi.
A function declaration defines a function with a specified name, whereas a function expression defines a function as part of a larger expression syntax, typically a variable assignment. The main difference is that function declarations are hoisted and can be called before they are defined, while function expressions are not.
How would you create an object in Toi?
In Toi, you can create an object using the object literal syntax, which is a pair of curly braces containing zero or more property-value pairs. For example, var obj = {name: 'John', age: 30}; creates an object with properties name and age.
What are the different ways to access properties of an object in Toi?
In Toi, you can access properties of an object using dot notation or bracket notation. Dot notation is more concise and easier to read, but bracket notation is more flexible because it can evaluate an expression to get a property name.
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What you’re looking for early on

Does the candidate have a solid understanding of Toi development?
Has the candidate demonstrated problem-solving skills?
Is the candidate able to communicate effectively?
Does the candidate show a willingness to learn and adapt?

Next 20 minutes

Specific Toi development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

Describe the difference between == and === in Toi.
The == operator in Toi performs type coercion if the types of the two operands are different, then compares the values for equality. The === operator, on the other hand, does not perform type coercion, and compares both the type and the value for equality.
How would you handle exceptions in Toi?
In Toi, you can handle exceptions using the try-catch-finally construct. You put the code that might throw an exception in the try block, the code to handle the exception in the catch block, and the code to be executed regardless of whether an exception is thrown or not in the finally block.
What are closures in Toi?
A closure in Toi is a function that has access to its own scope, the outer function's scope, and the global scope. This means that a closure can access variables from three different scopes. Closures are created every time a function is created, at function creation time.
Describe the difference between var, let, and const in Toi.
var is function scoped, and if it is declared outside a function, it is globally scoped. let and const are block scoped. var variables can be updated and re-declared within its scope, let variables can be updated but not re-declared, and const variables can neither be updated nor re-declared.
How would you implement inheritance in Toi?
Inheritance in Toi can be implemented using the prototype chain. Each object in Toi has a prototype property, which is a link to another object. When trying to access a property that does not exist in an object, Toi will traverse the prototype chain of the object to find the property.
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The ideal back-end app developer

What you’re looking to see on the Toi engineer at this point.

At this point, a skilled Toi engineer should demonstrate strong problem-solving abilities, proficiency in Toi programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Toi.

What does the following code do?
let x = 10;
let y = '5';
let result = x + y;
This code concatenates the integer 10 with the string '5' to produce the string '105'.
What will be the output of the following code?
let x = [1, 2, 3, 4, 5];
console.log(x.splice(2, 2));
The output will be [3, 4]. The splice() method changes the contents of an array by removing or replacing existing elements. In this case, it removes 2 elements starting from the index 2.
What does the following code do?
let arr = [1, 2, 3, 4, 5];
let result = arr.map(x => x * 2);
This code creates a new array where each element is twice the value of the corresponding element in the original array. The map() function applies the function x => x * 2 to each element of the original array.
What does the following code do?
class Thread {
  constructor(id) {
    this.id = id;
  run() {
    console.log('Running thread ' + this.id);
let t = new Thread(1);
This code defines a class named Thread with a constructor and a method called run(). An instance of the Thread class is created with id 1, and the run() method is called on this instance, which outputs 'Running thread 1'.

Wrap-up questions

Final candidate for Toi Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle Toi application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are promises in Toi?
A promise in Toi is an object that may produce a single value some time in the future. A promise is in one of three states: pending, fulfilled, or rejected. Once a promise is fulfilled or rejected, it is settled, and its state cannot change.
Describe the difference between synchronous and asynchronous programming in Toi.
Synchronous programming means that the code is executed sequentially from top-to-bottom, blocking on long-running tasks such as network requests and disk I/O. Asynchronous programming means that the code can continue to run while waiting for long-running tasks to complete, using callbacks, promises, or async/await.
How would you use the map function in Toi?
The map function in Toi is used to create a new array by applying a function to each element of an existing array. The function is called with three arguments: the current element, the index of the current element, and the original array.

Toi application related

Product Perfect's Toi development capabilities

Beyond hiring for your Toi engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Toi projects, and can engage in multiple capacities.