Tech Screener Quiz

Answers

Q1: Answer

1.True

2.False

foo1 returns:
Object {bar: "hello"}
foo2 returns:
undefined

Q2: Answer

Q2 Bonus Answer:

When the line containing the return statement (with nothing else on the line) is encountered in foo2(), a semicolon is automatically inserted immediately after the return statement.

No error is thrown since the remainder of the code is perfectly valid, even though it doesn’t ever get invoked or do anything (it is simply an unused code block that defines a property bar which is equal to the string "hello").

Q3: Answer

You can't be sure, JavaScript's floating point numbers lead to odd results

Q4: Answer

object

Q5: Answer

Up to 6

Q6: Answer

Linus Torvalds

Bonus: Finland

Q7: Answer

Prototypal inheritance (OO)

Functional Programming

Pure functions / function purity.
Avoid side-effects.
Simple function composition.
Recursion
Immutable data types
First Class or Higher Order Functions

Q8: Answer

Q9: Answer

Limit it to 2000

Q10: Answer

ng-show/ng-hide will always insert the dom element.

Q11: Answer

Changing .directive to .component to adapt to the new Angular 1.5 components

Q12: Answer

The first one.

jQuery is built on top of JavaScript and uses its methods under the hood to make DOM manipulation easier, at the cost of some performance overhead.

Q13: Answer

Purple

Q14: Answer

Answer: knex('cities').where('population', 5000000).update({name: 'Denver'})

Q15: Answer

document.querySelectorAll('.kitten');

Q16: Answer

Q17: Answer

SELECT first_name AS 'First Name', last_name AS 'Last Name' FROM Users;

Q18: Answer

SELECT first_name AS 'First Name', last_name AS 'Last Name', title AS 'Title' FROM users JOIN sports_teams ON users.id = sports_teams.user_id WHERE title = 'manager';