The teacher has prepared an electronic printed version for everyone. Friends who need the complete electronic version can check at the end of the article.【Answer Analysis】
1. Explanation: The answer is A.
This question examines the components of computer architecture. Memory in a computer is used to temporarily store data processed by the CPU and data exchanged with external storage devices like hard drives. The question emphasizes that the magnetic core component is a storage element in the control part of the computer’s operations, which is equivalent to the CPU in current computer components. As of September of the exam year, the storage structure of a general CPU is shown in the figure below, and the component most similar in function to the magnetic core is Cache, followed by Memory. Among the four options, the closest is option A.
2. Explanation: The answer is C.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the allocation of IPV4 addresses is detailed in the figure below.
3. Explanation: The answer is A.
This question examines the naming rules for C++ variables. Variable names must meet the following criteria:
① Variable names can only consist of uppercase and lowercase letters, numbers, and underscores (_);
② The first character cannot be a number;
③ Variable names cannot be keywords (reserved words) in C++.
Option A contains other characters ‘-‘, which do not comply with the naming rules.
Review and expansion of related knowledge points:
The figure below shows the list of C++ keywords as of September of the exam year.
4. Explanation: The answer is C.
Detailed analysis can be found in the figure below.
5. Explanation: The answer is C.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the operator precedence in C/C++ languages is detailed in the table below.
6. Explanation: The answer is D.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the implicit conversion in C/C++ languages is detailed in the figure below.
7. Explanation: The answer is A.
Detailed analysis can be found in the figure below.
8. Explanation: The answer is A.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of June of the exam year, the comparison of the mechanisms of the break and continue statements can be referenced in the image below.
9. Explanation: The answer is C.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the mechanisms of logical operators in C/C++ languages are detailed in the table below.
10. Explanation: The answer is B.
Detailed analysis can be found in the figure below.
11. Explanation: The answer is C.
Detailed analysis can be found in the figure below.
12. Explanation: The answer is A.
Detailed analysis can be found in the figure below.
13. Explanation: The answer is A.
In the C++ statement while(1), 1 will be converted to true at runtime, which is a common way to write an infinite loop without syntax errors.
14. Explanation: The answer is B.
Detailed analysis can be found in the figure below.
15. Explanation: The answer is A.
【Answer Analysis】
1. Explanation: Correct.
C++ is a high-level language that supports object-oriented programming.
2. Explanation: Incorrect.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the operation mechanism of the comma operator is illustrated with two examples in the figure below.
3. Explanation: Correct.
The function first calculates 10%2 = 2, then calculates 2%10 = 2, resulting in 2.
4. Explanation: Incorrect.
The function rand() is used to generate pseudo-random numbers and cannot guarantee which value will be larger in two calls.
Review and expansion of related knowledge points:
As of September of the exam year, the relevant knowledge points of random functions are detailed in the figure below.
5. Explanation: Incorrect.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the general ASCII code table is detailed in the figure below.
6. Explanation: Correct.
Detailed analysis can be found in the figure below.
Review and expansion of related knowledge points:
As of September of the exam year, the differences in the mechanisms of executing break and continue statements within loops are explained in detail in the figure below.
7. Explanation: Incorrect.
Detailed analysis can be found in the figure below.
8. Explanation: Correct.
Detailed analysis can be found in the figure below.
9. Explanation: Correct.
Detailed analysis can be found in the figure below.
10. Explanation: Incorrect.
Detailed analysis can be found in the figure below.
#include <iostream>
using namespace std;
int judge(int num){
int total=0;
while(num>0)
{
total=total+num%10;
num=num/10;
}
return total;
}
const int N=1E5+5;
int arr[N];
int main(){
int n;
cin>>n;
for(int i=0;i<n;i++)
{
cin>>arr[i];
}
for(int i=0;i<n;i++)
{
if(judge(arr[i])%7==0)
{
cout<<"Yes"<<endl;
}
else
{
cout<<"No"<<endl;
}
}
return 0;
}
#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
for(int i=1;i<=n;i++)
{
for(int j=1;j<=n;j++)
{
if(j==1||j==n)
{
cout<<"+";
}
else
{
if(i==j)cout<<"+";
else cout<<"-";
}
}
cout<<"\n";
}
}Learning Path——
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