ISRO CS 2020 – Exam Preparation

Question 1

Regression testing is primarily related to

  • Functional testing
  • Development testing
  • Data flow testing
  • Maintenance testing

Correct one Blow There . So, option (A) is correct.

Question 2

Of the following sort algorithms, which has execution time that is least dependent on initial ordering of the input ?


  • Insertion sort
  • Quick sort
  • Merge sort
  • Selection sort

So, option (C) is correct.

Question 3

The following circuit compares two 2-bit binary numbers, X and Y represented by X1X0 and Y1Y0 respectively. (X0 and Y0 represent Least Significant Bits)

Under what condition Z will be 1 ?

  • X > Y
  • X < Y
  • X = Y
  • X != Y

Given, expression is,
Z = X1Y1′ + (X1⊙Y1)X0Y0′
Therefore, if X > Y, then Z is 1. Option (A) is correct.

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