West Bengal Institute of Technology (WBIT) 2010-1st Year B.Tech Electronics and Communications Engineering WBUT 1st ntroduction to Computing - Question Paper
CS/B.Tech/Sem-2/CS-201/2010
Introduction to Computing
Time Allotted : three Hours
Full Marks : 70
Invigilator's Signature:...................
CS/B.Tech/SEM-2/CS-201/2010 2010
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate fullr,narks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP-A {A ( Multiple Choice Typ Questions )
1. Choose the correct alternatives fbrthe following :
x>
i) Which of the following is a bitwise operator ?
a) < by > =
c) d) &&
a/-mr-mory location containing the address of a <iable
A memory location
a value
d) none of these.
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iii) RAM stands for
a) Read-Write Access Member Random Access Memoiy
c) Read Access Memoiy
d) none of these.
iv) Number of bytes required for double in a 32 bit machine is
a) 64
v) The purpose of mode r+ is to
a) open for only reading 7
b) open for only writing
c) open for both reading and writing
d) none of these.
vi) What will be the ccxrecv output of the following code ?
int x = 9; if(10)
pxtntfCVod", ++.*) ;
else
printf("%d", x++);
a) 9 b) 10
vii) v Which is the range of unsigned short integer ?
a) 0 to 65535 b)/ 0 to 255
c) - 128 to 127 d) None of these,
viii) Which of the following declarations is invalid ?
a) int 2A b) int A2A
c) int A2 dK intAA2.
ix) Members of a union use
a) different storage locations
b) same storage location
c) no storage location
d) none of these.
x) Which among the following is a special operator ?
a) << b) + +
? : d) sizeof().
GROUP -B ( Short Answer Type Questions )
Answer any three of the following. 3x5= 15
Briefly describe the functions of different components of a conventional digital computer with a suitable block diagram. Write a C program to arrange a set of n numbers in ascending order.
Using ternary operator write <t macro to find out the absolute value of a number.
Draw a flowchart to find the largest among three numbers taken as input.
a) What are the (differences between recursion and iterations ? \j
b) Write a recursive C-function to calculate factorial of a number. 2 + 3
GROUP -C 3U>ng Answer Type Questions )
Answer any three of the following. 3 x 15 = 45
a) Differentiate between while and do-while statements with suitable example.
b) Differentiate between break and continue statements with suitable example.
c) Write a C program to check whether a given number is prime or not. 5 + 4 + 6
[ Turn over
3
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8. a) i) Convert fe "1011010 ) 2 to Octal
ii) Convert ( 35*453 ) 10 to Binary
iii) Convert ( SAC ) 16 to Decimal
iv) Convert ( - 496 ) 10 to Octal
v) Convert ( lOQIQIl } 2 to Hexadecimal.
b) What are 2 s complement numbers ? Using 2's compliment system perform ( 55 10 - 34 i0 ) in binary.
15 x 2 ) + 2 + 3
9. a) What is an array ? What condition must be satisfied by
the entire element of any given array ? What are subscripts ? <>
b) Write a program in C to multiply two 2D matrices and display the resultant matrix,
c) Explain the role of the C preprocessor. What is macro and how is it different from a C variable name ?
4 + 5 + 6
10. a) What is a function ? What are the advantages of using
functions ? What is the purpose of the return statement ?
b) What are function prototypes ? When and where are the prototypes normally used ?
c) Write a C program to find out the GCD of a number using recursion. 5 + 5 + 5
11. a) Explain the "Call by Value" and "Call by Reference"
mechanism for passing arguments into a function call in general with example.
b) Write a program in C to find out the number of vowels in a string. 10 + 5
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