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Here is one question that assesses knowledge of JavaScript semantics (specifically functions, function calls, conditionals, and inequalities).

JavaScript

What does the following JavaScript program print to the console?

function greet(name, time) {
  var greeting = "Good " + time + " " + name;
  if(name === "Alice")
    return greeting;
  greeting = greeting + "!";
  console.log(greeting);
  return greeting;
}

var banner = "Good night"
console.log("banner");
greet("Alice", "night");
console.log(banner);
greet("Bob", "night");

The correct answer is:

banner
Good night
Good night Bob!

DOM manipulation

Assume the following JavaScript was run on the Google home page and that the Google logo has the id hplogo. What does the following JavaScript program do?

var logo = document.getElementById("hplogo");
logo.style.width="100%";
logo.style.display="none";
var elements = document.getElementsByTagName("a");
for(var i = 0; i < elements.length; i++)
  elements[i].style.fontSize = "xx-large";
var elements = document.getElementsByTagName("input");
for(var i = 0; i < elements.length; i++)
  elements[i].setAttribute("disabled", "disabled");

The correct answer is:

  • Hides the Google logo
  • Changes the font size of all links to "xx-large"
  • Disables all inputs on the page

TDD assessment

Choose one of the following:

  • I have never heard of test-driven development.
  • I have heard of test-driven development, but do not know what it is.
  • I know what test-driven development is, but have not tried it.
  • I have tried test-driven development once or twice.
  • I have used test-driven development extensively.

Debugging assessment

Select your level of agreement with the following statements

When I debug, I start by guessing a possible cause, then gather data to test whether it is true.

  • Strongly disagree
  • Disagree
  • Agree
  • Strongly agree

When I debug, I start by finding the line of code that directly produced the faulty output, then work backwards from there.

  • Strongly disagree
  • Disagree
  • Agree
  • Strongly agree

When I debug, I only change the program once I understand the cause of the failure.

  • Strongly disagree
  • Disagree
  • Agree
  • Strongly agree