Refer to the following code:
Refer to the following code: What is returned by the function call on line 13? A. Line 13 throws an error B. undefined C. ‘Undefined value!’ D. ‘Null value!’ Reference: https://stackoverflow.com/questions/5515310/is-there-a-standard-function-to-check-for-null-undefined-or-blank-variables-in
A developer is creating a simple webpage with a button.
A developer is creating a simple webpage with a button. When a user clicks this button for the first time, a message is displayed. The developer wrote the JavaScript code below, but something is missing. The message gets displayed every time a user clicks the button, instead of just the first time. Which two code […]
Refer to the code below:
Refer to the code below: What is the value of result after line 10 executes? A. John undefined B. John Developer C. undefined Developer D. Error: myFather.job is not a function
Which statement can a developer apply to increment the browser’s navigation history without a page refresh?
Which statement can a developer apply to increment the browser’s navigation history without a page refresh? A. window.history.pushState(newStateObject); B. window.history.pushState(newStateObject, ‘’, null); C. window.history.state.push(newStateObject); D. window.history.replaceState(newStateObject, ‘’, null); Reference: https://developer.mozilla.org/en-US/docs/Web/API/History/replaceState
Refer to the code below:
Refer to the code below: What is the output if this function when called with an empty array? A. Returns 0 B. Returns NaN C. Returns 10 D. Throws an error Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Reduce_of_empty_array_with_no_initial_value
A test has a dependency on database.query.
A test has a dependency on database.query. During the test, the dependency is replaced with an object called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time. Which two test approaches describe the requirement? (Choose two.) A. […]
At Universal Containers, every team has its own way of copying JavaScript objects.
At Universal Containers, every team has its own way of copying JavaScript objects. The code snippet shows as implementation from one team: What is the output of the code execution? A. Hello John Doe B. Hello Dan Doe C. TypeError: dan.name is not a function D. TypeError: Assignment to constant variable
Given the code below:
Given the code below: What is logged to the console? A. 1 2 3 B. 1 3 2 C. 2 1 3 D. 2 3 1
Refer to the code below:
Refer to the code below: What value can a developer expect when referencing o.js.secondCity? A. An error B. ‘New York’ C. ‘new york’ D. undefined
A developer creates a generic function to log custom messages in the console.
A developer creates a generic function to log custom messages in the console. To do this, the function below is implemented. Which three console logging methods allow the use of string substitution in line 02? (Choose three.) A. info B. error C. message D. assert E. log