- Which of the following statements about forms are correct:
- The placeholder attribute can be used to prompt the user what to enter
- The user cannot directly modify the content of the text box containing the disabled attribute
- The maxlength attribute can limit the maximum number of characters entered in the text box
- The multiple attribute of input specifies that the input field can select multiple values.
- The space complexity of the algorithm is O(1). There are simple selection sorting and heap sorting
- Both Canvas and SVG can be drawn using JavaScript
- The type of css style file does not include style sheets, including internal style sheets, inline style sheets, and external style sheets
- The correct statement about merge sorting is
- Merge sort uses the idea of divide and conquer strategy
- Merge sort is stable
- When the sender and receiver of IP datagrams deliver across the network, the sender needs to use the ARP protocol to obtain the MAC address of the receiver’s IP address
- What are the characteristics of problems suitable for dynamic programming algorithms:
- Satisfy the principle of optimization
- The problem to be solved has overlapping sub-problems
- What is the result after the following code is executed?
let x =10;
let foo=() =>{
console.log(x);
let x=20;
x++;
}
foo();
The result is: RefenceError is thrown
Self-motivation
Be bold, anyway, there is only one life, there is no time to say, I can’t, I can’t, I’m afraid. Instead of doing this, it's better to do your best to do what you like.