Question

To insure that file output is written to the disk you need to execute what method?

a. commit()

b. write()

c. close()

d. complete()

The following is called the ________ of a function.

def myFunction(x,y) :

a. header

b. footer

c. sentinel

d. index

True or False: A commonly used program that uses regular expressions is grep.

True or False: In Python exception handling provides a mechanism for passing control from the point of the error detection to a handler than can deal with error.

True or False: A stub function is a function that acts as a placeholder and returns a simple value so another function can be tested.

What two items do you need to specify when reading a file in Python?

a. a file name and file properties

b. a file name and mode

c. a file name and size

d. a file name and data type

What happens if you try to open a file for input(read mode), but that file does not exist?

a. A default file, data.txt, is created as a new empty file

b. The program raises an exception

c. All attempts to read from the file return an empty string

d. All attempts to read from the file return random values

Assume string s = "red yellow blue". You then use y = s.split() to convert string s into a list. Which statement would print "blue"?

a. print(s[0])

b. print(y[1])

c. print(y[2])

d. print(s[2])

e. none of the above

The name of this function is ____________.

def m(x, y) :

z = x + y

return z

a. m

b. x

c. y

d. z

For this code, what is the point of this line: global total.

total = 0

def main() :

global total

avg = 0

for i in range(6):

total += i * i

avg = total / i

print (""Total, Avg"", total, avg)

a. "It does nothing, and could be removed without consequence"

b. it tells us that the local variable total is off limits

c. it is there to remind us that total is a local variable

d. it allows modifying the global variable total inside function

Which of the following is NOT a good practice when developing a computer program?

a. Put as many statements as possible into the main function and make it a giant jumble of code.

b. Document the purpose of each parameter.

c. Decompose a program into many small methods.

d. Place code that is used multiple times into a separate function.

A file has been opened for writing. Which of the following writes these 2 words, each word on a separate line. "Hello World"

a. outfile.print("Hello\n", "World\n")

b. outfile.write("Hello\n", "World\n")

c. outfile.print("Hello\n\World\n")

d. outfile.write("Hello\nWorld\n")

Answer 1

Answers :

1 . b

2 . a

3 . True

4 . True

5 . True

6 . b

7 . b

8 . c

9 . a

10 . d

11 . a

12 . d

Explanation :

1 . write() is used in python to write contents to a file

2 . def function_name() is always the head of the function.(It is a start of function)

3 . True , Explanation provided in statement it self.

4 . True , Explanation provided in statement it self.

5 . True , Explanation provided in statement it self.

6 . open('filename','mode') mode = 'r','w',.... [filename,mode are must to open a file]

7 . Program rises a exception if file does not exist but won't create it.

8 . List indices starts from 0.Since list has 3 words, Last word can be accessed with 2.

9 . function name comes after def.[Here,m]

10 . In order to modify global variable inside a function,It has to be declared as global inside a function.Here,It is declared so can be modified.

11 . a is not a good practice.

12 . write is used to write content to a file.To write in new lines '\n' is used.

Note :

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