大学MOOC Fundamentals of C Programming(Northwestern Polytechnical University)1457957182 最新慕课完整章节测试答案

Quiz 1 Introducing C

1、单选题：
​When compile a C program, the comments will       .‌
选项：
A: be compiled and appear in the object code.
B: be compiled, but not appear in the object code.
C: not be compiled and not appear in the object code.
D: not be compiled, but appear in the object code
答案: 【 not be compiled and not appear in the object code.】

2、单选题：
​A file written by C language       .‌
选项：
A: can be executed immediately.
B: is a source program.
C: can be executed after compilation.
D: can be executed after compilation and interpretation.
答案: 【 can be executed after compilation.】

3、判断题：
‎Many programming languages borrow heavily form C language, including C++,  C# .‏
选项：
A: 正确
B: 错误
答案: 【 正确】

4、判断题：
‍One of C’s advantages is efficiency. Because C was intended for applications where assembly language had traditionally been used, it was crucial that C programs could run quickly and in limited amounts of memory.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

5、判断题：
​C’s weaknesses arise from the same source as many of its strengths: C’s closeness to the machine.​
选项：
A: 正确
B: 错误
答案: 【 正确】

Quiz 13 Files

1、单选题：
‍Which one of the following is correct about data file and C language?‍
选项：
A: Files consist of ASCII character sequence and C language can only read and write text files.
B: Files consist of binary data sequence and C language can only read and write binary files.
C: Files consist of records sequence and can be categorized into binary files and text files by the storage form of the data.
D: Files consist of data streams and can be categorized into binary files and text files by the storage form of the data.
答案: 【 Files consist of data streams and can be categorized into binary files and text files by the storage form of the data.】

2、单选题：
‎The system standard input file is       .   ‍
选项：
A: monitor
B: floppy disk
C: hard disk
D: keyboard
答案: 【 keyboard】

3、单选题：
‍The system standard output file is      .  ‏
选项：
A: hard disk
B: keyboard
C: floppy disk
D: monitor
答案: 【 monitor】

4、单选题：
‌Which one of the following is a correct file name argument for the function fopen?   ‍
选项：
A: c:usertext.txt
B: c:\user\text.txt
C: "c:usertext.txt"
D: "c:\user\text.txt"
答案: 【 "c:\user\text.txt"】

5、单选题：
‏Given char fname[]="infile.dat"; , which one of the following is a correct way to open the text file infile.dat for reading?   ‍
选项：
A: fopen(infile，"r")
B: fopen("infile"，"r")
C: fopen("fname"，"r")
D: fopen(fname，"r")
答案: 【 fopen(fname，"r")】

6、单选题：
‍Which one of the following is a correct way to create a file for both reading and writing using the function fopen ?      ‏
选项：
A: "ab+"
B: "rb+"
C: "ab"
D: "wb+"
答案: 【 "wb+"】

7、单选题：
‏If errors occur while executing the function fopen, what is its return value?   ‎
选项：
A: the address
B: 1
C: EOF
D: NULL
答案: 【 NULL】

8、单选题：
​If open an existing file using the argument "a+", which one of the following is correct?‍
选项：
A: When it is open, the origin file content remains, the accessing pointer moves to the beginning of the file and rewriting/reading operations are available. 
B: When it is open, the origin file content is deleted, only reading operation is available.
C: None of the above is correct.
D: When it is open, the origin file content remains, the accessing pointer moves to the end of the file and appending/reading operations are available. 
答案: 【 When it is open, the origin file content remains, the accessing pointer moves to the end of the file and appending/reading operations are available. 】

9、单选题：
‌In the file open modes, the string "rb" indicates            .  ‍
选项：
A: opening a text file only for data writing.
B: opening an existing text file only for data reading.
C: opening a binary file only for data writing.
D: opening an existing binary file only for data reading.
答案: 【 opening an existing binary file only for data reading.】

10、单选题：
‎When opening the text file "a:\aa.dat" in the mode "w", if the file already exists,        .‏
选项：
A: the new data will be appended to the end of the file. 
B: the error message will be displayed. 
C: the new data will be insert into the beginning of the file.
D: the file will be clear and the new data is written from the beginning.
答案: 【 the file will be clear and the new data is written from the beginning.】

11、单选题：
​In C program, which one of the following can write an integer data into a file in binary form? ‎
选项：
A: fprint
B: fputs
C: fputc
D: fwrite
答案: 【 fwrite】

12、单选题：
‌Which one is the prototype of the function fputc that write a character to the disk files?   ‏
选项：
A: FILE* fputc(char)
B: int fputc(FILE *)
C: int fputc(FILE *,char)
D: int fputc(char,FILE *)
答案: 【 int fputc(char,FILE *)】

13、单选题：
‍Which one of the following operations can be done using the function fseek? ‎
选项：
A: sequential file access 
B: random file access
C: all of the above
D: changing the file position associated with the file pointer.
答案: 【 changing the file position associated with the file pointer.】

14、单选题：
‍The function calling fseek(fp,-20L,SEEK_END) complete the operation            .    ‌
选项：
A: moving the file pointer to the location 20 bytes to the file header.
B: moving the file pointer 20 bytes forward from the current location.
C: moving the file pointer 20 bytes backward from the current location.
D: moving the file pointer 20 bytes backward from the end of the file.
答案: 【 moving the file pointer 20 bytes backward from the end of the file.】

15、单选题：
‌Which one of the following codes is nearly equal to fseek(fp,0L,SEEK_SET)?    ‍
选项：
A: feof(fp)
B: ftell(fp)
C: fgetc(fp)
D: rewind(fp)
答案: 【 rewind(fp)】

16、单选题：
‌The function rewind can             .    ‏
选项：
A: move the file pointer to the specific location of the file.
B: move the file pointer to the end of the file.
C: move the file pointer to the location of the next character.
D: move the file pointer to the beginning of the file.
答案: 【 move the file pointer to the beginning of the file.】

17、单选题：
​The function ftell(fp) can          .       ​
选项：
A: move the pointer of the stream file.
B: initialize the pointer of the stream file.
C: all the above.
D: get the current location of the stream file.
答案: 【 get the current location of the stream file.】

Quiz 2 DataType, Variable and Constant

1、单选题：
​Which of the following is a legal C identifier？‌
选项：
A: 1stuNPU
B: Stu@NPU
C: stu-NPU
D: _stu_NPU
答案: 【 _stu_NPU】

2、单选题：
​Which of the following is not keyword in C language？‌
选项：
A: do
B: int
C: void
D: main
答案: 【 main】

3、单选题：
‍Which of the following is NOT a constant in C language?‏
选项：
A: 012
B: "a"
C: 'n'
D: 'AB'
答案: 【 'AB'】

4、单选题：
‏Which of the following is NOT a float constant in C language?‎
选项：
A: 2.38
B: .23
C: 1.2e-2
D: e-2
答案: 【 e-2】

5、判断题：
‌The three identifiers, weight, Weight and WEIGHT, are NOT equal in C language.‍
选项：
A: 正确
B: 错误
答案: 【 正确】

Quzi 3 Operators and Expression

1、单选题：
‏ In C language, which of the following operator requires its operands must be of type int?‍
选项：
A: /
B: *
C: =
D: %
答案: 【 %】

2、单选题：
‌ Of which operation the precedence is higher than others’? ‎
选项：
A: +
B: %
C: *
D: ()
答案: 【 ()】

3、单选题：
‌ The value of the expression 3.6-5/2+1.2+5%2 is ____. ‎
选项：
A: 4.3
B: 4.8
C: 3.3
D: 3.8
答案: 【 3.8】

4、单选题：
‎Suppose all variables in the following expressions have been declared and initialized, which of the following is NOT a legal expression in C language? ​
选项：
A: a = (2, b= c + 2)
B: (int)18.5%3
C: a = b += c + b
D:  a := b + 1
答案: 【  a := b + 1】

5、单选题：
‍If an expression is the sum of four data of different types, including int, long, double and char, the expression’s type is ____.‏
选项：
A:  int
B:  long
C: char
D: double
答案: 【 double】

6、判断题：
‍The expressions ++i and i++ are exactly NOT the same as (i += 1).‎
选项：
A: 正确
B: 错误
答案: 【 正确】

Quiz 4 Formatted Input & Output

1、单选题：
‍ If c is a variable of type char, which one of the following statements is illegal?‍
选项：
A: i += c; /*i has type int*/
B: c = 2*c – 1;
C: putchar(c);
D:  printf(c);
答案: 【  printf(c);】

2、单选题：
Suppose that we call scanf as follows:‍scanf(“%d%f%d”, &i, &x, &j);‍If the user enters:‍10.8 9 3↙‍What will be the values of i, x, and j after the call? (Assume that i and j are int variables and x is a float variable. ↙ is used to represent Enter key)‍‏‍
选项：
A: 10 9 3
B: 11 9 3
C: 10.8 9 3
D: 10 0.8 9
答案: 【 10 0.8 9】

3、单选题：
Suppose that we call scanf as follows:​scanf(“%f%d%f”, &x, &i, &y);​If the user enters:​12.3 45.6 789​What will be the values of x, i, and y after the call? (Assume that x and y are float variables and i is an int variable. ↙ is used to represent Enter key)​‍​
选项：
A: 12.3 45 789
B: 12.3 45.6 789
C: 12 45 789
D: 12.3 45 0.6
答案: 【 12.3 45 0.6】

4、单选题：
‍Which one of the following is correct?‌
选项：
A: The output item must be given when calling function printf.
B: When calling function getchar to read in a character, we can input its corresponding ASCII code.
C: In C language, integers can be output in various forms, e.g. decimal, binary, octal and hexadecimal.
D: The header file stdio.h must be included before calling function putchar.
答案: 【 The header file stdio.h must be included before calling function putchar.】

5、单选题：
Assuming the following statements:​char c1='1',c2='2';​c1=getchar();​c2=getchar();​putchar(c1);​putchar(c2);​If input a└┘↙ when run the code, ↙ is used to represent Enter key, └┘ is used to represent space, which one of the following statements is correct? ​‏​
选项：
A: The program will wait for the second character input by user.
B: Variable c1 is assigned the character a, and c2 remains the character 2.
C: Variable c1 is assigned the character a, and c2 remains uncertain value.
D: Variable c1 is assigned the character a, and c2 is assigned the space character.
答案: 【 Variable c1 is assigned the character a, and c2 is assigned the space character.】

6、单选题：
Given the following declarations and scanf function call statements, to make the value of a1, a2, c1, c2 to be 10, 20, A and B respectively. Which one of the following inputs is correct? ↙ is used to represent Enter key and └┘ is used to represent space.                 （ D ）‎int a1,a2;‎char c1,c2;‎scanf("%d%d",&a1,&a2);‎scanf("%c%c",&c1,&c2);‎​‎
选项：
A: 1020AB↙
B: 10└┘20↙AB↙
C: 10└┘20└┘AB↙
D: 10└┘20AB↙
答案: 【 10└┘20AB↙】

7、单选题：
‍Assuming the statement scanf("a=%d,b=%d,c=%d",&a,&b,&c); To make the values of a, b, and c to be 1, 3, 2 respectively, which of the following input is correct? ↙ is used to represent Enter key and └┘ is used to represent space.‌
选项：
A: 132↙
B: 1,3,2↙
C: a=1└┘b=3└┘c=2↙
D: a=1,b=3,c=2↙
答案: 【 a=1,b=3,c=2↙】

8、单选题：
‍If the variable x is of type double, which one of the following statements is right?​
选项：
A: scanf("%f",x);
B: scanf("%f",&x);
C: scanf("%5.1f",&x);
D: scanf("%lf",&x);
答案: 【 scanf("%lf",&x);】

9、单选题：
What is the output of the following code? └┘ is used to represent space.     ‏float x=-1023.012;‏printf("%8.3f,",x);‏printf(" % 10.3f",x);‏‍‏
选项：
A: 1023.012,-1023.012
B: –1023.012,-1023.012
C: 1023.012,└┘-1023.012
D: –1023.012,└┘-1023.012
答案: 【 –1023.012,└┘-1023.012】

10、单选题：
What is the output of the following code?‍int x=13,y=5;‍printf("%d",x%=(y/=2));‍‎‍
选项：
A: 3
B: 2
C: 0
D: 1
答案: 【 1】

11、单选题：
‍If we declared int a=1234;, what is the result when executing the statement printf("%2d",a);?  ‎
选项：
A: 12
B: 34
C: Error
D: 1234
答案: 【 1234】

12、单选题：
What is the output of the following code? ‌int a;‌char c=10;‌float f=100.0;‌double x;‌a=f/=c*=(x=6.5);‌printf("%d %d %3.1f %3.1f",a,c,f,x);‌‏‌
选项：
A: 1 65 1 6.5
B: 1 65 1.0 6.5
C: 2 65 1.5 6.5
D: 1 65 1.5 6.5
答案: 【 1 65 1.5 6.5】

13、单选题：
Execute the following statements, if input 12345678↙，what is the output?‎int a , b ;‎scanf("%2d%*2d%3d",&a,&b);‎printf("%d",a+b);‎‎‎
选项：
A: 46
B: 5690
C: Error
D: 579
答案: 【 579】

14、判断题：
‎C compilers are required to check that the number of conversion specifications in a format string matches the number of output items. ‌
选项：
A: 正确
B: 错误
答案: 【 错误】

15、判断题：
​ If the format string is “%dn”, scanf will skip white space, read an integer, and then skip to the next non-white-space character. So a format string like this can cause an interactive program to “hang” until the user enters a nonblank character. ‎
选项：
A: 正确
B: 错误
答案: 【 正确】

Quiz 5 Selection Structure

1、单选题：
After the execution of the following statements:‍‍int a=1, b=2, c=3, d=4, m=2, n=2, cond;
cond = (m=a>b) && (n=c>d);‍, which one of the following value is equal to the value of n ?‍‍‍
选项：
A: 1
B: 2
C: 3
D: 4
答案: 【 2】

2、单选题：
​Suppose i is a variable of type int, and its value is 10, which of the following is the value of expression 30-i<=i<=9 ? ‌
选项：
A: 0
B: 1
C: 9
D: 20
答案: 【 1】

3、单选题：
After the execution of the following statements:‌int a=0,b=0,m=0,n=0; 
(m=a==b)||(n=b==a);，the values of m and n are        and        respectively?‌‍‌
选项：
A: 0 0
B: 1 0
C: 0 1
D: 1 1
答案: 【 1 0】

4、单选题：
‏Which of the following is equal to the expression !x ?‍
选项：
A: x==1
B: x==0
C: x!=1
D: x!=0
答案: 【 x==0】

5、单选题：
Suppose ​int x=3,y=4,z=5;​, which of the following is the value of the expression !(x+y)+z-1 && y+z/2 ?​‌​
选项：
A: 6
B: 1
C: 2
D: 0
答案: 【 1】

6、单选题：
‎Which of the following is not a legal expression in C language? ​
选项：
A: 0<=x<100
B: x+1=x+1
C: i=j==0
D: (char)(x<100)
答案: 【 x+1=x+1】

7、单选题：
‌The expression in if(expression) can be        .‏
选项：
A: logical expression
B: any of the above
C: relational expression
D: arithmetic expression
答案: 【