1.Which of the following will produce true only if the character cis either a digit or an upper case English letter? (c >= 0 && c <= 9) || (c >= A && c<= Z)(c >= 0 && c <= 9) || (c >= ‘A’ && c<= ‘Z’)(c >= ‘0’ && c <= ‘9’) || (c >= ‘A’ && c<= ‘Z’)(c >= ‘0’ && c <= ‘9’) && (c >= ‘A’ && c<= ‘Z’) 2.Performing a = upper(c)on a variable that is known to contain a character from 'a' to 'z' is the same as:a = c +’a’-‘A’;a = c +’A’- ‘a’a = c – ‘A’;a = c – ‘a’; 3.Which of the following will read a string from a file with FILE* fpto char myString[81] properly (safely):fscanf(fp, "%s", myString );fgets(myString, fp);fgets(fp, 81, myString); correct : fgets(myString, 81,fp)fscanf(fp,"%80s", myString); 4.If you issue the statement fpIn = fopen("myfile.dat", "a");and dat does not exist, the computer will:return NULLto fpIn as the file does not existcreate the file in write mode, and position the file pointer at the beginning of the filecreate the file in write mode, close the file and return a warningopen a file that most closely resembles the name 'myfile.dat'5. How many bytes in the memory will be occupied by short int array[10]10 Bytes20 Bytes40 Bytes60 Bytes 6.Given the definition void myFunc(int a, int* b , int* c)which statement is trueThe values of the aliases a, band c are available to the functionOnly the addresses of the variables b, care available to the functionmyFunccannot change the variable whose value is copied to amyFunc can change the value of the variable whose address is copied into ball of the above 7Which of the following is a TRUE statement regarding the strcpy(char * str1, char * str2)function? It copies str2in str1 if str1 has enough spaceIt adds str2to str1 making a long stringIt returns NULL if str1has a shorter length compared to str2It copies the terminating null after coping the characters from str2to str1 8.Give charstr[5]=" "; what is the value of *(str+1) = str[1]9.What if I asked for *str + 1= str[0] + 1 = 32 + 1 = 33Str[0]32=’ ‘ 0------ ------ 1001 0‘0’spaceunknown value 10.Give char str[15]="Hello World"; what is the value of*str and *str+1‘H’ , ‘H’ + 1*str and *(str + 1)‘H’ and ‘e’‘H’ and ‘I’Address of first and second characters of the string‘H’ and ‘f’ 11.Defining char myString[10]=”IPC144” what is the value of strlen( 1+ myString)1+ strlen(myString) would be 7105 -- correct67

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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1.Which of the following will produce true only if the character cis either a digit or an upper case English letter?

1. (c >= 0 && c <= 9) || (c >= A && c<= Z)
2. (c >= 0 && c <= 9) || (c >= ‘A’ && c<= ‘Z’)
3. (c >= ‘0’ && c <= ‘9’) || (c >= ‘A’ && c<= ‘Z’)
4. (c >= ‘0’ && c <= ‘9’) && (c >= ‘A’ && c<= ‘Z’)

2.Performing a = upper(c)on a variable that is known to contain a character from 'a' to 'z' is the same as:

1. a = c +’a’-‘A’;
2. a = c +’A’- ‘a’
3. a = c – ‘A’;
4. a = c – ‘a’;

3.Which of the following will read a string from a file with FILE* fpto char myString[81] properly (safely):

1. fscanf(fp, "%s", myString );
2. fgets(myString, fp);
3. fgets(fp, 81, myString); correct : fgets(myString, 81,fp)
4. fscanf(fp,"%80s", myString);

4.If you issue the statement fpIn = fopen("myfile.dat", "a");and dat does not exist, the computer will:

1. return NULLto fpIn as the file does not exist
2. create the file in write mode, and position the file pointer at the beginning of the file
3. create the file in write mode, close the file and return a warning
4. open a file that most closely resembles the name 'myfile.dat'

5. How many bytes in the memory will be occupied by short int array[10]

1. 1. 10 Bytes
  2. 20 Bytes
  3. 40 Bytes
  4. 60 Bytes

6.Given the definition void myFunc(int a, int* b , int* c)which statement is true

1. The values of the aliases a, band c are available to the function
2. Only the addresses of the variables b, care available to the function
3. myFunccannot change the variable whose value is copied to a
4. myFunc can change the value of the variable whose address is copied into b
5. all of the above

7Which of the following is a TRUE statement regarding the strcpy(char * str1, char * str2)function?

It copies str2in str1 if str1 has enough space
It adds str2to str1 making a long string
It returns NULL if str1has a shorter length compared to str2
It copies the terminating null after coping the characters from str2to str1

8.Give charstr[5]=" "; what is the value of *(str+1) = str[1]

9.What if I asked for *str + 1= str[0] + 1 = 32 + 1 = 33

Str[0]

32=’ ‘ 0

------ ------

1001

0
‘0’
space
unknown value

10.Give char str[15]="Hello World"; what is the value of

*str and *str+1

‘H’ , ‘H’ + 1

*str and *(str + 1)

‘H’ and ‘e’
‘H’ and ‘I’
Address of first and second characters of the string
‘H’ and ‘f’

11.Defining char myString[10]=”IPC144” what is the value of
strlen( 1+ myString)
1+ strlen(myString) would be 7

1. 10
2. 5 -- correct
3. 6
4. 7

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