Computer Programming – Set 3

Number of Questions: 25

Module Duration: 35 min

Detailed Syllabus:

Basic Programming

•Data Types•Iteration, Recursion, Decision•Procedure, functions and scope

Data Structures

•Arrays, Linked Lists, Trees, Graphs•Stacks, Queues•Hash Tables•Heaps

OOPs

•Polymorphism•Abstraction•Encapsulation

Miscellaneous

•Searching and Sorting•Complexity Theory

Ques 1. Consider the following code: function modify(w,u) {

w = w + 2 u = u - 3 return (w - u)

} function calculate( ) {

integer a = 10, b = 20, c c = modify(a, b); print a print space print b

} Assume that a was passed by value and b was passed by reference. What will be the output of the program on executing function calculate( ) ? Op 1: 12 17 Op 2: 10 17 Op 3: 12 20 Op 4: 10 20

Ques 2. Which one of the following is the lowest level format to which the computer converts a higher language program before execution? Op 1: English code Op 2: Machine Code Op 3: Assembly Language Op 4: System Language

Correct Option of Ques 1 Op 2: 10 17

Ques 3. If you want to write a function that swaps the values of two variables, you must pass them by:Op 1: Value only Op 2: Reference only Op 3: Either A or B Op 4: Neither A nor B

Correct Option of Ques 2 Op 2: Machine Code

Ques 4. Consider the following code: if (condition 1) {

if (condition 2) { // Statement A } else if (condition 3) { // Statement B } else { // Statement C }

}else if (condition 4) { // Statement D

} else { // Statement E}

}Which of the following conditions will allow execution of statement C? Op 1: condition1 AND condition3 Op 2: condition1 AND condition4 AND !condition2 Op 3: NOT(condition2) AND NOT(condition3) Op 4: condition1 AND NOT(condition2) AND NOT(condition3)

Correct Option of Ques 3 Op 2: Reference only

Ques 5. What does the following function do? function operation (int a, int b) {

if (a < b) { return operation(b, a) } else { return a }

} Op 1: Returns the max of (a,b) Op 2: Returns the min of (a,b) Op 3: Loops forever Op 4: Always returns the second parameter

Correct Option of Ques 4 Op 4: condition1 AND NOT(condition2) AND NOT(condition3)

Ques 6. What does the following function do? function operation (int a, int b){

if (a > b) { return operation(b, a) } else { return a; }

} Op 1: Always returns the first parameter Op 2: Returns the min of (a,b) Op 3: Returns the max of (a,b) Op 4: Loops forever

Correct Option of Ques 5 Op 1: Returns the max of (a,b)

Ques 7. function g(int n) { if (n > 0) return 1; else return -1;

} function f(int a, int b) {

if (a > b) return g(b-a); if (a < b) return g(a-b); return 0;

} If f(a,b) is called, what is returned? Op 1: Always -1Op 2: 1 if a > b, -1 if a < b, 0 otherwise Op 3: -1 if a > b, 1 if a < b, 0 otherwise Op 4: 0 if a equals b, -1 otherwise

Correct Option of Ques 6 Op 2: Returns the min of (a,b)

Ques 8. function g(int n) { if (n > 0) return 1; else return -1;

} function f(int a, int b) {

if (a > b) return g(a-b); if (a < b) return g(b-a); return 0;

} If f(a,b) is called, what is returned? Op 1: 1 if a > b, -1 if a < b, 0 otherwise Op 2: Always +1 Op 3: 0 if a equals b, +1 otherwise Op 4: -1 if a > b, 1 if a < b, 0 otherwise

Correct Option of Ques 7 Op 4: 0 if a equals b, -1 otherwise

Ques 9. function g(int n) { if (n > 0) return 1; else return -1;

} function f(int a, int b){

if (a > b) return g(a-b); if (a < b) return g(-b+a); return 0;

} If f(a,b) is called, what is returned? Op 1: Always +1 Op 2: 1 if a > b, -1 if a < b, 0 otherwise Op 3: -1 if a > b, 1 if a < b, 0 otherwise Op 4: 0 if a equals b, -1 otherwise

Correct Option of Ques 8 Op 3: 0 if a equals b, +1 otherwise

Ques 10. function g(int n) { if (n > 0) return 1; else return -1;

} function f(int a, int b) {

if (a > b) return g(b-a); if (a < b) return g(-a+b); return 0; }

If f(a,b) is called, what is returned? Op 1: Always +1 Op 2: -1 if a > b, 1 if a < b, 0 otherwise Op 3: 1 if a > b, -1 if a < b, 0 otherwise Op 4: 0 if a equals b, -1 otherwise

Correct Option of Ques 9 Op 2: 1 if a > b, -1 if a < b, 0 otherwise

Ques 11. function g(int n) { if (n > 0) return 1; else return -1;

} function f(int a, int b) {

if (a > b) return g(b-a); if (a < b) return g(-a+b); return 0;

} If f(a,b) is called, what is returned? Op 1: Always +1 Op 2: -1 if a > b, 1 if a < b, 0 otherwise Op 3: 1 if a > b, -1 if a < b, 0 otherwise Op 4: 0 if a equals b, -1 otherwise

Correct Option of Ques 10 Op 2: -1 if a > b, 1 if a < b, 0 otherwise

Ques 12. Consider the following code: for i= m to n increment 2 {

print "Hello!" } Assuming m < n and exactly one of (m,n) is even, how many times will Hello be printed? Op 1: (n - m + 1)/2 Op 2: 1 + (n - m)/2 Op 3: 1 + (n - m)/2 if m is even, (n - m + 1)/2 if m is odd Op 4: (n - m + 1)/2 if m is even, 1 + (n - m)/2 if m is odd

Correct Option of Ques 11 Op 2: -1 if a > b, 1 if a < b, 0 otherwise

Ques 13. Consider the following code: for i= m to n increment 2 {

print "Hello!" } Assuming m < n and (m,n) are either both even or both odd, How many times will Hello be printed?Op 1: (n - m + 1)/2 Op 2: 1 + (n - m)/2 Op 3: 1 + (n - m)/2 if m is even, (n - m + 1)/2 if m is odd Op 4: (n - m + 1)/2 if m is even, 1 + (n - m)/2 if m is odd

Correct Option of Ques 12 Op 1: (n - m + 1)/2

Ques 14. Assuming n > 2, What value does the following function compute for odd n? function f (int n) {

if (n equals 1) { return 1 } if (n equals 2) { return f(n-1) + n/2 } return f(n-2) + n;

} Op 1: 1 + 2 + 3 + 4 + ... + n Op 2: 1 + 3 + 5 + 7 + ... + n Op 3: n/2 + (1 + 3 + 5 + 7 + ... + n) Op 4: 1 + (1 + 3 + 5 + 7 + ... + n)

Correct Option of Ques 13 Op 2: 1 + (n - m)/2

Ques 15. Assuming n > 2, What value does the following function compute for even n? int f (int n) {

if (n equals 1) { return 1 } if (n equals 2) { return f(n-1) + n/2 } return f(n-2) + n

} Op 1: 1 + 2 + 3 + 4 + ... + n Op 2: 1 + (2 + 4 + 6 + 8 + ... + n) Op 3: 1 + n/2 + (4 + 6 + 8 + ... + n) Op 4: 2 + 4 + 6 + 8 + ... + n

Correct Option of Ques 14 Op 2: 1 + 3 + 5 + 7 + ... + n

Ques 16. The for loop is equivalent to a while loop when Op 1: There is no initialization expression Op 2: There is no increment expression Op 3: A and B combined are true Op 4: It is never equivalent

Correct Option of Ques 15 Op 4: 2 + 4 + 6 + 8 + ... + n

Ques 17. Consider the statement while (a < 10.0) {

a = a*a } Assuming a is positive, for what value of a will this code statement result in an infinite loop? Op 1: a < 1.0 Op 2: a < sqrt(10) Op 3: a > sqrt(10) Op 4: a = 0

Correct Option of Ques 16 Op 3: A and B combined are true

Ques 18. int area(double radius) { return PI*radius*radius;

} Which of the following is always true about the function area? Op 1: It returns the area of a circle within the limits of double precision.Op 2: It returns the area of a circle within the limits of the constant PI. Op 3: It returns the area of a circle within the limits of precision of double, or the constant PI, whichever is lower. Op 4: None of the above.

Correct Option of Ques 17 Op 1: a < 1.0

Ques 19. What does this function compute for positive n? function f(int n) {

if (n equals 1) { return 1

} else { return f(n-1)/f(n-1) + n

} } Op 1: 1 + n Op 2: 1 + 2 + 3 + ... + n Op 3: 1 + n, if n > 1, 1 otherwise Op 4: None of the above

Correct Option of Ques 18 Op 4: None of the above.

Ques 20. Which of these is not a data type? Op 1: integer Op 2: character Op 3: boolean Op 4: array

Correct Option of Ques 19 Op 3: 1 + n, if n > 1, 1 otherwise

Ques 21. The construct "if (condition) then A else B" is for which of the following purposes? Op 1: Decision-Making Op 2: Iteration Op 3: Recursion Op 4: Object Oriented Programming

Correct Option of Ques 20 Op 4: array

Ques 22. In a sequential programming language, code statements are executed in which order? Op 1: All are executed simultaneously Op 2: From top to bottom Op 3: From bottom to top Op 4: None of these

Correct Option of Ques 21 Op 1: Decision-Making

Ques 23. A for-loop is used for which of the following purposes? Op 1: Decision-Making Op 2: Iteration Op 3: Recursion Op 4: None of these

Correct Option of Ques 22 Op 2: From top to bottom

Ques 24. There are two loops which are nested. This implies which one of the following? Op 1: Two loop, one after the otherOp 2: Two loops, one inside the others Op 3: One loop with two different iteration counts Op 4: Two loops with the same iteration count

Correct Option of Ques 23 Op 2: Iteration

Ques 25. How will 47 be stored as an unsigned 8-bit binary number? Op 1: 10111101 Op 2: 00101111 Op 3: 10111000 Op 4: 00101101

Correct Option of Ques 24 Op 2: Two loops, one inside the others

EndComputer Programming - Set 3

Correct Option of Ques 25 Op 2: 00101111