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Document Object Model And Event Handling MCQ question and answer in javascript with solution

Learn Document Object Model And Event Handling MCQ Questions and answers in javascript with easy and logical explanations. Document Object Model And Event Handling MCQ question in Javascript which provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-1 section-2

Each section contains 100 MCQs on Document Object Model and Event Handling .
1
When are the keyboard events fired?
Discuss
Answer & Solution
Answer: Option B
Solution:
The keydown and keyup events are fired when the user presses or releases a key on the keyboard. They are generated for modifier keys, function keys, and alphanumeric keys.
2
How does a user generate multiple keydown events?
Discuss
Answer & Solution
Answer: Option C
Solution:
If the user holds the key down long enough for it to begin repeating, there will be multiple keydown events before the keyup event arrives.
3
Which property is used to specify the key type when pressed?
Discuss
Answer & Solution
Answer: Option A
Solution:
The event object associated with these events has a numeric keyCode property that specifies which key was pressed.
4
What value does the keyCode property holds when a Shift key is pressed for adding punctuation character?
Discuss
Answer & Solution
Answer: Option D
Solution:
The number keys always generate keyCode values for the digit that appears on the key, even if you are holding down Shift in order to type a punctuation character.
5
Which of the following are not key event properties?
Discuss
Answer & Solution
Answer: Option A
Solution:
altKey, ctrlKeY, shiftKey, and metaKey are key event object’s properties, which are set to true if the corresponding modifier key is held down when the event occurs.
6
Which of the following key property holds the key name as a string?
Discuss
Answer & Solution
Answer: Option B
Solution:
The DOM Level 3 Events defines a new key property that contains the key name as a string.
7
Which of the following is not the value the key property will hold if the key is a function key?
Discuss
Answer & Solution
Answer: Option A
Solution:
If the key is a function key, the key property will be a value like “F2”, “Home”, or “Left”.
8
Which method is used to add a binding?
Discuss
Answer & Solution
Answer: Option C
Solution:
To add a binding, use bind() method.
9
Which method is used to remove a binding?
Discuss
Answer & Solution
Answer: Option D
Solution:
To remove a bind, use unbind() method.
10
Which of the following are the parameters passed to the keymap after installation?
Discuss
Answer & Solution
Answer: Option C
Solution:
After the keymap is installed, the following parameters are passed:
1. The event object for the keydown event.
2. The key identifier of the key that was pressed.