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TCS Digital Recursion and Iteration Quiz- 1

Question 1

Time: 00:00:00

function main() { integer a=5,b=7 switch(a) { case 5 :print "I am 5" break case b:print "I am not 5" break default:print "I am different" } }

I am 5

I am not 5

I am different

Error

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Break should have ;

for not showing error

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Question 2

Time: 00:00:00

Ashima wants to print a pattern which includes checking and changing a variables value iteratively She decides to use a loop/condition Which of the following options should she use such that the body of the loop/condition is executed atleast once whether the variable satisfies the entering condition or not?

For loop

While Loop

Do while loop

Switch case

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Do-while loop is the only loop which executes once, even if the starting condition is wrong

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Question 3

Time: 00:00:00

The construct “if (condition) then A else B” is for which of the following purposes?

Iteration

Decision Making

Recursion

Object Oriented Programming

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In this condition it is checked if the first condition is right then we\'ll go with A otherwise we\'ll go with B

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Question 4

Time: 00:00:00

Ravi and Rupali are asked to write a program to sum the rows of 2X2 matrices stored in the array A.
Ravi writes the following code (Code A):
for n = 0 to 1
sumRow1[n] = A[n][1] + A[n][2]
end
Rupali writes the following code (Code B):
sumRow1[0] = A[0][1] + A[0][2]
sumRow1[1] = A[1][1] + A[1][2]
Comment upon these codes (Assume no loop unrolling done by compiler):

Code A will execute faster than Code B

Code B will execute faster than Code A

Code A is logically incorrect.

Code B is logically incorrect.

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both codes are taking 2 steps of operation, therefore same complexity.

But if we consider the overhead of looping (as it takes time to increment counter) then code b will be faster.

hence option 2. B is faster.

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Question 5

Time: 00:00:00

Integer a =40, b =35, c=20, d =10
Comment about the output of the following two statements •

Print a*b/c-d

Print a*b/(c-d)

Comment about the output of the following two statements

Differ by 80

Same

Differ by 50

Differ by 160

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Differ by 80

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Question 6

Time: 00:00:00

What is the output of the following pseudo code?

Int a =456,b,c,d=10;
b=a/d;
c=a-b;
print c;

411

410

456

none of these

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)b=456/10=45(Quotient)
c=456-45=411

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Question 7

Time: 00:00:00

Function main()
{
Integer i=0.7
Static float m=0.7
If(m equals i)
Print(“We are equal”)
Else If(m>i)
Print(“I am greater”)
Else
Print(“I am lesser”)

We are equal

I am greater

I am lesser

This code will generate an error

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two different data types cannot be compared with each other without type-casting

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Question 8

Time: 00:00:00

Recursion is a method in which the solution of a problem depends on ____________

Larger instances of different problems

Larger instances of the same problem

Smaller instances of the same problem

Smaller instances of different problems

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In recursion, the solution of a problem depends on the solution of smaller instances of the same problem.

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Question 9

Time: 00:00:00

Which of the following problems can be solved using recursion?

Factorial of a number

Nth fibonacci number

Length of a string

All of the mentioned

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All of the above mentioned problems can be solved using recursion.

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Question 10

Time: 00:00:00

Recursion is similar to which of the following?

Switch Case

Loop

If-else

None of the mentioned

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Recursion is similar to a loop.

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["0","40","60","80","100"]

["Need more practice! \r\n \r\n","Keep trying! \r\n \r\n","Not bad! \r\n \r\n","Good work! \r\n \r\n","Perfect! \r\n \r\n"]

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