OAU CSC 201 Practice Quiz

The code shown above prints the appropriate option depending on the conditions given. The condition which matches is (9>0), and hence the output is: good.

The result of the expression shown above is (6.0, 16.0). This is because the result is automatically rounded off to one decimal place.

Loops over the values.

Modulus operator gives the remainder. So, 22%3 gives the remainder, that is, 1.

In the code shown above, the decorator helps us to prefix the dollar sign along with the value. Since the second argument is zero, the output of the code is: $100.

The formatting option print(“%Ns”,X) helps us add ‘N’ number of spaces before a given string ‘X’. Hence the output for the code snippet shown above will be 56 blank spaces before the string “san-foundry”.

The expression shown above results in the output 456.

The line of code can be translated to state that ‘f’ is printed if the argument passed to the Boolean function amount to zero. Else ‘t’ is printed. The argument given to the Boolean function in the above case is ‘spam’, which does not amount to zero. Hence the output is t.

The function len() returns the length of the number of elements in the iterable. Therefore the output of the function shown above is 4.

NameError, i is not defined.

We use the function append to add an element to the list.

In the code shown above, we have used a decorator in order to avoid the Zero Division Error. Hence the output of this code is:

    hello
    NO

The loop does not terminate since i is never an even number.

If the truth method is not defined, the object is considered true. Hence the output of the code shown above is true.

Python shell throws a NoneType object back.

List data type can store any values within it.

~x is equivalent to -(x+1).

When both of the operands are integer then python chops out the fraction part and gives you the round off value, to get the accurate answer use floor division. This is floor division. For ex, 5/2 = 2.5 but both of the operands are integer so answer of this expression in python is 2. To get the 2.5 answer, use floor division.

The first letter of the string is converted to uppercase and the others are converted to lowercase.

Numbers starting with a 0 are octal numbers but 9 isn’t allowed in octal numbers.

^ is the XOR operator. The binary form of 4 is 0100 and that of 12 is 1100. Therefore, 0100^1100 is 1000, which is equal to 8.

The expression shown above is evaluated as: 2+9*(36-8)/10, which simplifies to give 2+9*(2.8), which is equal to 2+25.2 = 27.2. Hence the result of this expression is 27.2.

Carefully look at the colons.

OverflowError, cannot convert float infinity to integer.

Loops over the keys of the dictionary.

0O11 is an octal number.

The else part is executed when the condition in the while statement is false.

Variable names can be of any length.

The output that is required is 6, that is, row 2, item 3. This position is represented by the statement: A[1][2].

Variable x is incremented and printed twice.

Bitwise XOR gives 1 if either of the bits is 1 and 0 when both of the bits are 1.

All the statements will execute successfully but at the cost of reduced readability.

Execute in the shell.

This is a built-in function which rounds a number to give precision in decimal digits. In the above case, since the number of decimal places has not been specified, the decimal number is rounded off to a whole number. Hence the output will be 5.

// is integer operation in python 3.0 and int(..) is a type cast operator.

[::-1] reverses the list.

// is the operator for truncation division. It is called so because it returns only the integer part of the quotient, truncating the decimal part. For example: 20//3 = 6.

eval can be used as a variable.

In the code shown above, we have not passed any parameter to the function p. Hence the output of this code is: hello.

The binary form of 1 is 0001. The expression x<<2 implies we are performing bitwise left shift on x. This shift yields the value: 0100, which is the binary form of the number 4.

The output of the expression above will be 22.19. This expression specifies that the total number of digits (including the decimal point) should be 5, rounded off to two decimal places.

The expression shown above is an example of explicit conversion. It is evaluated as int(43.55+1) = int(44.55) = 44. Hence the result of this expression is 44.