CBSE Class 11 Computer Data Handling Operators And Expressions Worksheet

Topic: Data Handling, Operators & Expressions

Q 1 What are ‘enumerations’? Explain through example

Q 2 Explain all the six fundamental data types.

Q 3 Write a program to check whether a given number is even or odd.

Q 4 What will be the value returned by the following if value assigned to integer variable k is 3 ?
a) k<2
b) k= =2
c) k<=3||k>4

Q 5 What is the value of i and j in the two cases given below?
a) i=7 j= i ++
b) i=8 j= --i

Q 6 What will be the value assigned to integer variable x as under:- Z=a*x*x+b*x+c where a,b,c and x are 2,4,5 and 3 respectively?

Q 7 Evaluate x+=x++ + ++x if, initially x=15.

Q 8 Given the following code fragment
int marks=25;
cout << ++marks <<”n”;
cout << marks<<”n”;
(i) What output does the above code fragment produce?
(ii) What is the effect of replacing ++marks with marks++?
(iii) What is the effect of replacing ++marks with marks+1?

Q 9 What will be the output of the code segment given below:
int a = 200, b=7;
cout << a/b << endl;

Q 10 If initially, the value of name =100, then what will be the output of the code given below:-
cout << name -- ;
cout << ++ name ;

Q 11 What will be the result of the following expressions, if initial value of I = 20?
1) ++I<=20
2) I++<=20

Q 12 Construct logical expressions to represent the following conditions:
(a) exp is a lowercase letter
(b) Marks is in the range 400-500 or grade is ‘A’
(c) Grade is ‘B’ and experience is more than 5 years.

Q 13 Write a statement that uses a conditional operator to set grade =’A’, if marks is more than 70 and B otherwise.

Q 14 Given the two expressions
marks=10
marks==10
What is the difference between the two expressions?

Q 15 Suppose a and b are two type double variables that we want to add as integers and assign to an integer variable. Construct a C++ statement for doing so?

Q 16 Given the following set of declarations :
char ch;
int i, j, k;
float a, b, c;
double p,q;
Which of the following are valid arithmetic expressions?
a) ch=100
b) i-j+k
c) i%k
d) a%b+c-k
e) p+q/b>i

Q 17 What will be the resultant type of the following expression if int is an integer variable and fl is a float variable?

Q 18 Write the corresponding C++ expressions for the following mathematical expressions:
(a) (cos x/sin^-1 x )+ y
(b) (x² + y² + z² )1/2
(c) | ey + y |
(d) a+ b/ (x +y)⁷

Q 19 Given the following set of declarations:
int x, y, z, d;            float p, q, r;         double a, b, c ;
Which of the following are valid arithmetic expressions and which are invalid. And state the reason why they are invalid.
(a) (ceil (p) + x ) z.
(b) a b * c / d.
(c) c/p +y * x / z.
(d) log (-18) + x/ y.
(e) x*+d

Q 20 Which header file must be included to make use of C++‘s built-in mathematical functions?

Q 21 Evaluate the following C++ expression
int x, ch=5, n=10;
x = ch * 7/ 4 + ch/5 +25 –ch +7/2 +3 /11

Q 22 What is type conversion? What is meant by implicit and explicit type conversion?

Q 23 Given the following set of identifiers:
char ch;
short sh;
int inval;
long lg;
float fl;
double db;
Identify the data type of the following expressions:
a) 4.55 +’z’
b) (fl * lg) +inval
c) ch/inval +fl *db – (long/sh)

Q 23 Write a statement to print the size of
(i) double type on your machine.
(ii) a long int variable result.

Q 24 Suppose a and b are two type float variables that we want to add as integers and assign to an integer variable marks. Construct a C++ statement to do so.

Q 25 Write a program to input three integers and print the largest of them.

Q 26 The following code is giving error. Can you detect the error and help in successful compilation of this code?
Code:
# include < iostream.h >
void main ()
{ int x, y ;
cin >> y;
cout << “The square root of y is :“ << sqrt (x) ; }

Q 27 Distinguish between a structure and an array?