Computer Science – Data File Handling

Name of the Chapter- DATA FILE HANDLING



Question Question Content Learning Objective(if
No Provided)
Q1. Suppose content of ‘mytext.txt’ file is: Knowledge



What will be the output of the following code?
file = open(“mytext.txt”, ‘r’)
txt = file.read()
print(file.read(10))

(A) The key to
(B) obstacles.
(C) Error
(D No Output
Q2. Consider the following directory structure: Application




There are three directories under root directory ‘Admin’.
The current working directory is Final. Identify the
relative path name for file ‘Result1.xlsx’.
(A) .\Result1.xlsx
(B) Admin\Final\First Term\Result1.xlsx
(C) ..\First Term\Result1.xlsx
(D) First Term\Result1.xlsx

Q3. Which of the following statements is correct regarding Understanding
file access modes?
(A) In ‘r’ mode, we can read and write data from/in the
file.
(B) In ‘a’ mode, the existing data will be over-written if
the file exists.

, (C) In ‘w’ mode, the data in the file is retained and new
data will be appended to the end.
(D) In ‘a+’ mode, both reading and writing operations can
take place and new data is appended to the end of the
existing file.

Q4. Consider a statement Understanding
fileobj = open(“myblog.txt”, ‘r’)
Which of the following options can be used to print the
last line of a text file ‘myblog.txt’?
(A) print(fileobj.readlines() -1)
(B) disp = fileobj.readlines()
print(disp[-1])
(C) print(fileobj.readlines(-1))
(D) print(fileobj.read(-1))

Q5. Which of the following statements is used to open a text Understanding
file to add new contents at the end of the already existing
text file named ‘mydiary.txt’?
(i) with open(“’mydiary.txt”, ‘w’) as fileobj:
(ii) fileobj = open(“mydiary.txt”, ‘a’)
(iii) with open(“mydiary.txt”,’a’) as fileobj:
(iv) with open(“mydiary”, ‘r+’) as fileobj:

(A) Only (i)
(B) Only (ii)
(C) Both (ii) and (iii)
(D) Both (i) and (iv)

Q6. “The information is stored in machine-readable format Understanding
and pickle module is used for reading and writing
data from/in the file.”
Identify the type of file discussed in the above lines?
(A) Text files
(B) CSV files
(C) Binary file
(D) All of the above

Q7. Assume that you are writing in a text file; now you want Knowledge
to identify where the cursor is currently at in the
file. Which function will you use for the same?
(A) seek()
(B) hide()
(C) tell()
(D) type()

,Q8. Consider the statements given below: Evaluation
Fileobj = open(“Report.txt”, ‘r’)
Fileobj.seek(25,0)
Choose the statement that best explains the second
statement.
(A) It will place the pointer at 25 bytes ahead of the
current file pointer position.
(B) It will place the pointer at 25 bytes behind from the
end-of file.
(C) It will place the pointer at 25 bytes from the
beginning of the file.
(D) It returns 25 characters from the 0th index.

Q9. To read 4th line from text file, which of the following Knowledge
statement is true?
(A) dt = f.readlines();print(dt[3])
(B) dt=f.read(4) ;print(dt[3])
(C) dt=f.readline(4);print(dt[3])
(D) All of these

Q10. Which of the following groups of functions belongs to Application
CSV module?
(A) reader(), writer()
(B) readlines(), writelines()
(C) writerow(), read()
(D) writer(), readline()

Q11. Which is/are the basic I/O (input-output) stream(s) in Application
file?

(A) Standard Input
(B) Standard Output
(C) Standard Errors
(D) All of the above
Q12. Consider the content of the file ‘Story.txt’: Application




What is the output of the following code?

, Fileobj = open("story.txt", 'r')
S1= Fileobj.read(20)
S2= Fileobj.tell()
Fileobj.seek(34,0)
S3= Fileobj.read(20)
print(S3)

(A) The Tortoise meanwhi
(B) slowly but steadily
(C) Hare was sleeping
(D) he Tortoise in time

Q13. Consider a file “online.txt” Evaluation




What will be the output of the following code?
fileobj=open('online.txt','r')
count = 0
l=fileobj.readline()
for i in l:
if 'o' in i:
count=count+1
print(count)
fileobj.close()

(A) 10
(B) 8
(C) 9
(D) 20

Q14. Which function is used to write all the characters? Understanding

(A) write()
(B) writecharacters()
(C) writeall()
(D) writechar()

Q15. What is the difference between r+ and w+ modes? Knowledge

(A) No difference.
(B) In r+ mode, the pointer is initially placed at the
beginning of the file and for w+, the pointer is placed at