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JavaScript Basics Overview Quiz

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Questions and Answers

What will be the output of the JavaScript code snippet provided?

a is not equal to 10, 15, or 20
a is equal to 10
a is equal to 15
a is equal to 20 (correct)

In the switch statement provided in the text, what will be the output if 'grade' is assigned 'B'?

C Grade
No Grade
B Grade (correct)
A Grade

Which looping structure in JavaScript is commonly used for iterating through arrays?

for-in loop (correct)
for loop
do-while loop
while loop

What is the purpose of the 'else' statement in JavaScript conditional structures?

To execute code only when none of the preceding conditions are true (C) Signup and view all the answers

In JavaScript, what does the 'default' case in a switch statement signify?

It represents the case where no other case matches the condition (C) Signup and view all the answers

Which loop in JavaScript is ideal when the number of iterations is known beforehand?

for loop (B) Signup and view all the answers

'Syntax if (condition1) { code } else if (condition2) { code } else { code }' represents which type of control flow structure in JavaScript?

'if-else-if' (A) Signup and view all the answers

'execute code block 2' in a switch statement corresponds to which part of a control structure?

'case 2:' (A) Signup and view all the answers

'startvalue' in a for loop declaration refers to:

'var' keyword marking the start of the loop (A) Signup and view all the answers

'var grade='B'; var result;' represents which type of variable declaration in JavaScript?

'var' (C) Signup and view all the answers

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