The National College Entrance Examination Paper for Programmers has been exposed. How many questions can you answer correctly?

#include <cstdio>
int n, d[100];
bool v[100];
int main( ) {
    scanf("%d", &n);
    for (int i = 0; i The output result is: <p></p>
<blockquote>A.10<p> B.7<br> C. 1<br> D.6<br></p>
</blockquote>12. To save attributes in the session object, which of the following statements can be used ( )<p></p>
<blockquote>A.session.getAttribute(“key ","value")<p> B.session.setAttribute("key","value")<br> C.session.setAttribute("key")<br> D.session.getAttribute("key")<br></p>
</blockquote>13. The transmission medium is not affected by electromagnetic interference or noise ( ). <p></p>
<blockquote>A.Twisted pair<p> B. Optical fiber<br> C. Coaxial cable<br> D.Microwave<br></p>
</blockquote>14.5G starts from which version of 3GPP of? <p></p>
<blockquote>A.Rel13<p> B.Rel14<br> C.Rel15<br> D.Rel16<br></p>
</blockquote>15. The sorting code of a group of records is (46 , 79, 56, 38, 40, 84), the result of one sorting is (40, 38, 46, 56, 79, 84), then the () sorting algorithm is used. <p></p>
<blockquote>A. Bubble<p> B. Direct insertion<br> C. Quick<br> D. 2-way merge<br></p>
</blockquote>16. For any tree Binary tree T, H(T) represents the height of the tree. If the tree T contains n nodes, then ()<p></p>
<blockquote>A.H(T)=O(n)<p> B.H(T)≤O(logn)<br> C.H(T)= O(logn)<br> D.H(T)≥O(logn)<br></p>
</blockquote>17. The following statement returns true ()<p></p>
<p><img src="https://img.php.cn/upload/article/000/000/020/ea6394adc9607857d5523b34603bec0b-1.png" alt="The National College Entrance Examination Paper for Programmers has been exposed. How many questions can you answer correctly?"></p>
<blockquote>A. a1<p>a2<mark> B. d1<br>d2</mark> C. b1<br>b2<mark> D. c1<br>c2</mark></p>
</blockquote>18. Which of the following is not an entity of the 5G RLC layer ()<p></p>
<blockquote>A. TM<p> B. UM<br> C. AM<br> D. IM<br></p>
</blockquote>
<p>19. Which of the following algorithms require an auxiliary space for a record during the sorting process ( ) </p>
<blockquote><p>A. Direct selection sorting <br> B. Direct insertion sorting <br> C. Bubble sort<br> D. Merge sort</p></blockquote>
<p>20, IPv6 address is () bit. </p>
<blockquote><p>A.128<br> B.64<br> C.48<br> D.32</p></blockquote>
<p><strong>2. Simple questions</strong></p>
<p>1. What is singleton pattern? Let’s talk about its usage scenarios based on the code. </p>
<p>2. Given a binary tree with root as the root and an integer target, please delete all leaf nodes whose value is target. </p>
<p>3. Please briefly describe the core of the quarrel between programmers and product managers? </p>
<p><strong>3. Programming question</strong></p>
<p>N pieces of bread can be eaten in two ways, one at a time or two at a time. Find the sequence combination of all eating methods. Print. No limitation on programming language! </p>
<p><strong>4. Additional questions</strong></p>
<p> Programmer Xiao Li’s girlfriend not only has good looks and long legs, but also loves sports. She likes to cross the stairs when climbing stairs. She also likes to climb two or three steps on one step. If there are N steps on a staircase, how many ways can she climb? Please write a program in any language! </p>
<hr>
<p>Finally, I wish all students who participated in the <a href="https://www.hfplg.com/" target="_self">College Entrance Examination</a> this year a successful start and a spot on the gold list! </p>
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