Mobile Development and JavaScript | Module 1

Course Name: Mobile Development and JavaScript

Course Link: Mobile Development and JavaScript

These are Mobile Development and JavaScript Week 1 Coursera Answers

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Module 1 Quiz: Introduction to JavaScript

Q1. DevTools console is useful for doing which of the following?

• Running Javascript in a web browser.
• Downloading packages.
• Installing npm.
• Testing your code.

Answer: Running Javascript in a web browser.

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Q2. You can run JavaScript in what web browser tool?

• GUI
• Package manager
• DevTools Console
• console.log

Answer: DevTools Console

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Q3. // is used to indicate what kind of information in javascript?

• inline comments
• unfinished code
• multi-line comments
• test code

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These are Mobile Development and JavaScript Week 1 Coursera Answers

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Q4. /* Comment */ is used to indicate what kind of information in javascript?

• inline comments
• test code
• multi-line comments
• unfinished code

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Q5. Which of the following data types would you use to store a true or false value?

• booleans
• numbers
• function
• string

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Q6. Which of the following operators would you add in the place of XX to output Not zero?

var a = 4;
var b = 6;
if (a > 0 XX b > 0) {
 console.log = “Not zero”;
}

• &
• &&
• ||
• \

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These are Mobile Development and JavaScript Week 1 Coursera Answers

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Q7. What is the primary difference between == and ===?

• == is used for numbers and === is used for strings.
• There is no difference between == and ===.
• == operator compares the values as well as the data types of the operands.
• === operator compares the values as well as the data types of the operands.

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Q8. How many times will the following code print the word Hello?
for(var i = 0; i <= 5; i++)
{for(var j = 0; j < 3; j++){console.log(“Hello”);}}

• 15
• 8
• 0
• 18

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Q9. How many times will the following code print the word Hello?
for(var i = 10; i >=1; i–) { console.log(“Hello”); }

• 10
• 9
• 0
• 1

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These are Mobile Development and JavaScript Week 1 Coursera Answers

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Q10. What will print out when the following code runs?
var i = 3; var j = 5; if(i == 3 && j == 5) { console.log(“Hello”); } else { console.log(“Goodbye”); }

• Hello
• undefined
• Nothing
• Goodbye

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Q11. What will print out when the following code runs?
var i = 7; var j = 2; if(i !== 7 || j !== 5) { console.log(“Hello”); } else { console.log(“Goodbye”); }

• Nothing
• undefined
• Goodbye
• Hello

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Q12. What will print out when the following code runs?
var i = 7; var j = 6; if(i < 7 || j < 5) { console.log(“Hello”); } else { console.log(“Goodbye”); }

• Hello
• Goodbye
• undefined
• Nothing

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These are Mobile Development and JavaScript Week 1 Coursera Answers

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Q13. True or False: When you add the NOT operator before a boolean value, the returned value is the opposite of the boolean value.

• False
• True

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Q14. What is the output of the following statement?
7 !== 9

• false
• undefined
• syntaxError
• true

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Q15. What will be the output of the following code block?

var i = 5;
while (i > 0) {
 console.log(i);
 i = i - 1;
};

• It will count backwards from 5.
• It will count to 5.
• undefined
• i = 0

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These are Mobile Development and JavaScript Week 1 Coursera Answers

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