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

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.

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

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

Answer: DevTools Console

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

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

These are Mobile Development and JavaScript Week 1 Coursera Answers

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

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

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

  • booleans
  • numbers
  • function
  • string
Answer: booleans

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”;
}
  • &
  • &&
  • ||
  • \
Answer: &&

These are Mobile Development and JavaScript Week 1 Coursera Answers

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.
Answer: === operator compares the values as well as the data types of the operands.

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
Answer: 18

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
Answer: 10

These are Mobile Development and JavaScript Week 1 Coursera Answers

See also  Mobile Development and JavaScript | Module 5

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
Answer: Hello, Goodbye

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
Answer: Hello

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
Answer: Goodbye

These are Mobile Development and JavaScript Week 1 Coursera Answers

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
Answer: True

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

  • false
  • undefined
  • syntaxError
  • true
Answer: true

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
Answer: It will count to 5.

These are Mobile Development and JavaScript Week 1 Coursera Answers

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Mobile Development and JavaScript Week 1 Coursera

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