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Javascript Questions Set 166:

Quiz Mode

Which one of the following defines properties for the map?

mapOptions

zoom

center

mapTypeId

Solution:

What is the output of the following JavaScript code?

`var x; window.alert(x);`

Prints nothing

undefined

none

Solution:

Which React Router component is used to define the route matcher?

<Route>

Solution:

Which of the following are types of errors in JavaScript?

All of the above

Runtime error

Load time error

Logical error

Solution:

The type of a variable that is volatile is ______________

Volatile variable

Mutable variable

Immutable variable

Dynamic variable

Solution:

Which method to use to get a particular value using the tagged value?

getTagName()

getElementsbyTagName()

getElementsbyID()

All of the above

Solution:

What is the output of the following JavaScript code?

`[1, 2, 3].map(function(n) { return !(n > 1) ? 1 : arguments.callee(n - 1) * n; });`

Undefined

1, 4, 6

callee is unusual syntax

1, 4, 9

Solution:

Which of the following is the correct way of initializing an array?

var arr=new Array(1,2,'john');

var arr= new Array(); arr[0]=1; arr[1]=2; arr[2]="john";

var arr=[1,2,"john"];

All of the above

Solution:

One of the special features of an interpreter in reference with the for loop is that ___________

The body of the loop is executed only once

Before each iteration, the interpreter evaluates the variable expression and assigns the name of the property

the iteration is finite when an interpreter is used

The iterations can be infinite when an interpreter is used

Solution:

What is a reducer in the context of state management?

A reducing function that returns the previous state tree, given the current state tree and an action to handle.

A reducing function that returns the next state tree, given the current state tree and an action to handle.

A reducing function that returns the next state tree, given the current state tree.

None of these.

Javascript Questions Set 166:

Which one of the following defines properties for the map?

Solution:

What is the output of the following JavaScript code?

`var x; window.alert(x);`

Solution:

Which React Router component is used to define the route matcher?

Solution:

Which of the following are types of errors in JavaScript?

Solution:

The type of a variable that is volatile is ______________

Solution:

Which method to use to get a particular value using the tagged value?

Solution:

What is the output of the following JavaScript code?

`[1, 2, 3].map(function(n) { return !(n > 1) ? 1 : arguments.callee(n - 1) * n; });`

Solution:

Which of the following is the correct way of initializing an array?

Solution:

One of the special features of an interpreter in reference with the for loop is that ___________

Solution:

What is a reducer in the context of state management?

Solution:

Related Question Sets:

Related Topics:

Javascript Questions Set 166:

Which one of the following defines properties for the map?

Solution:

What is the output of the following JavaScript code? var x;window.alert(x);

Solution:

Which React Router component is used to define the route matcher?

Solution:

Which of the following are types of errors in JavaScript?

Solution:

The type of a variable that is volatile is ______________

Solution:

Which method to use to get a particular value using the tagged value?

Solution:

What is the output of the following JavaScript code? [1, 2, 3].map(function(n) { return !(n > 1) ? 1 : arguments.callee(n - 1) * n; });

Solution:

Which of the following is the correct way of initializing an array?

Solution:

One of the special features of an interpreter in reference with the for loop is that ___________

Solution:

What is a reducer in the context of state management?

Solution:

Related Question Sets:

Related Topics:

What is the output of the following JavaScript code?

`var x; window.alert(x);`

What is the output of the following JavaScript code?

`[1, 2, 3].map(function(n) { return !(n > 1) ? 1 : arguments.callee(n - 1) * n; });`