TypeScript for Beginners - Using for-in and instanceof
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct syntax to access the value of a property in an object using square brackets?
object{propertyName}
object(propertyName)
object['propertyName']
object.propertyName
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which operator is used to check if a property is not equal to a specific value?
!==
===
==
!=
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the 'instanceof' operator in JavaScript?
To check if a variable is undefined
To compare two objects for equality
To determine if an object is an instance of a specific type
To convert a string to a number
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 'continue' keyword do in a loop?
Pauses the loop until a condition is met
Exits the loop immediately
Restarts the loop from the beginning
Skips the current iteration and continues with the next one
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the 'break' keyword differ from 'continue' in loop control?
'break' and 'continue' both exit the loop
'break' pauses the loop, 'continue' restarts it
'break' exits the loop, 'continue' skips the current iteration
'break' skips the current iteration, 'continue' exits the loop
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