File IO in Lua

Faq.txt

Q1. What does a+ mode means in lua?
ans: a+ mode is the mode where we can append,read and create a file.

Q2. How can we create a file in lua?
ans: We can open the file in w+ , if the file doesn't exist it will create a new file.

Q3. what does seek() do in lua?
ans: seek() function is use to place the filepointer to a specific position.

Q4. What does close() function do?
ans: This will close an opened file. If you close a file ,it can't be read or written anymore. 

Mcq.txt

Q1. What will be the output of this statement?
      file=io.open("test.txt","w+")
      file:write("Hello Pepcoder\n")

      file:seek("end",-9)
      print(file:read())

a) Error
b) Pepcoder
c) Hello
d) ello pepcoder

ans: b)

Q2. What will be the output of this statement?

      file=io.open("test.txt","a+")
      file:write("Hello Pepcoder\n")
      file:write("Hello Pepcoder1\n")

      file:seek("set",5)
      print(file:read())
      
a) Hello Pepcoder
b) Pepcoder
c) Hello Pepcoder
   Hello Pepcoder1
d) Pepcoder1

ans: b)

Q3. What will be the output , consider the same file as in previous question?
         
      file=io.open("test.txt","w+")
      file:write("Bye pepcoder")
      file:seek("set",0)
      print(file:read("*a"))
      
a) Hello Pepcoder
   Hello Pepcoder1
   Bye pepcoder
b) Hello Pepcoder
   Hello Pepcoder1
c) Bye pepcoder
d) none of the above

ans: c)

Q4. What is the correct way to write to a file?

a) io.write()
b) file_name.write()
c) file_name:write()
d) none of the above

ans:c)