IIT Mandi 2010-1st Sem B.Tech Computer Science and Engineering Computer science cs101 end sem - Question Paper

ans all ques.. No calculators or cellphones. Maximum marks: 70

1) Fill in the blanks: [6]
a) The method in which arguments are passed to functions by sending the addresses of the
arguments is called __________________________________.

b) The ________________ unary operator cannot be applied to a float or double.

c) A leading 0x on an integer constant means that it is _______________________

d) Enum provides an option to ______________________

e) provided the declarations below:
struct time
{
int hours;
int mins;
int secs;
} t;
struct time *tt;
tt = &t;
two ways of referring to the seconds field of tt are ________________________
and ___________________________.

f) When finding the root of an equation, the _________________________ method is
guaranteed to converge while the ___________________________ method may not
converge.

g) The minimax approximation ____________________ the maximum
______________________________.

h) The OpenOffice functions to calculate the avg. and standard deviation of a set of
numbers are ______________________ and ___________________________.

2) ans briefly: [8]

a) Write a C statement to create an array of 20 floats at runtime.

b) Using the ? operator, write an expression whose value is the maximum of 2 integers
a and b.

c) What is the difference ranging from the gdb commands step and next?

d) Write equivalent code using a while loop:
for(i=0; i<10; i++)
{
do Something();
}

e) What does this loop print?
for (i = 0; i < 10; i += 2)
printf("%d\n", i);

f) What does this loop print?
for (i = 2; i < 100; i *= 2)
printf("%d\n", i);

g) Suppose the root of the function f(x) is used to estimate the avg. marks in this final
exam. The function is known to have several roots with values approximately equal
to 0.045, 45, 245 and 4,545. choose the initial values x0 and x1 to be used with the
regula falsi method.

h) To ensure that it terminates, what kind of statement must be included in every
recursive function?

3) ans briefly: [10]
a) Suppose the current working directory in a shell window is
~/cs110/assign1/data. It is desired to create a directory for assign2 and
make this the current directory. provide a sequence of shell commands to achieve this.

b) Suppose that an examiner is observed to take 30 seconds to accurate five objective
ques. and corrects 10 ques. in 45 seconds. It is desired to estimate how long
she will take to accurate 50 ques.. Would you use linear or quadratic or exponential
regression? Justify your ans.

c) Suppose the cells A1 and B1 in a spreadsheet contain formulae as shown below, what
do you expect will be the result? discuss your ans.

Earning:   Approval pending.