AWS, JavaScript, React - Deploy Web Apps on the Cloud
 - Implementing the Calculator - Operators

AWS, JavaScript, React - Deploy Web Apps on the Cloud - Implementing the Calculator - Operators

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

This video tutorial guides viewers through the process of enhancing a calculator application by implementing a calculation function, updating the state and display, handling operator inputs, and debugging errors. The lesson covers creating a function to perform calculations, updating the calculator's state with new totals, and managing operator inputs. It concludes with testing the calculator and identifying errors, providing a comprehensive understanding of building a functional calculator app.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial value displayed on the calculator before any input?

5

0

10

1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of the 'do calculation' function?

To update the display with the new total

To concatenate numbers

To reset the calculator

To handle button clicks

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the last pressed operator stored in the calculator's state?

As an array

As a number

As a string

As a boolean

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which operation is NOT handled by the switch case in the 'do calculation' function?

Exponentiation

Subtraction

Multiplication

Addition

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the default case in the switch statement?

To keep the current value

To reset the calculator

To handle unknown operators

To perform division

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the clear button do when pressed?

Resets the calculator to its initial state

Adds a zero to the display

Performs a calculation

Displays an error message

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was the error encountered when testing the equals button?

The equals button was not clickable

The calculator displayed the wrong total

The calculator reset unexpectedly

The equals button did not update the display

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