**Exhibit 12.1**

**Infosys Technologies  Limited**

**Certification of Principal  Executive Officer**

**Pursuant to Section 302 of  the Sarbanes-Oxley Act of 2002**

  I,  S. Gopalakrishnan, certify that: 
| 1. | I    have reviewed this annual report on Form 20-F of Infosys Technologies    Limited;                                                                                                                                                                                                                                                        |
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| 2. | Based    on my knowledge, this report does not contain any untrue statement of a    material fact or omit to state a material fact necessary to make the    statements made, in light of the circumstances under which such statements    were made, not misleading with respect to the period covered by this report;                        |
| 3. | Based    on my knowledge, the financial statements, and other financial information    included in this report, fairly present in all material respects the    financial condition, results of operations and cash flows of the company as    of, and for, the periods presented in this report;                                              |
| 4. | The    company's other certifying officer and I are responsible for establishing and    maintaining disclosure controls and procedures (as defined in Exchange Act    Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting    (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company    and have: |
|   | (a) | Designed    such disclosure controls and procedures, or caused such disclosure controls    and procedures to be designed under our supervision, to ensure that material    information relating to the company, including its consolidated subsidiaries,    is made known to us by others within those entities, particularly during the    period in which this report is being prepared; |
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|   | (b) | Designed    such internal control over financial reporting, or caused such internal    control over financial reporting to be designed under our supervision, to    provide reasonable assurance regarding the reliability of financial reporting    and the preparation of financial statements for external purposes in    accordance with generally accepted accounting principles;     |
|   | (c) | Evaluated    the effectiveness of the company's disclosure controls and procedures and    presented in this report our conclusions about the effectiveness of the    disclosure controls and procedures, as of the end of the period covered by    this report based on such evaluation; and                                                                                               |
|   | (d) | Disclosed    in this report any change in the company's internal control over financial    reporting that occurred during the period covered by the annual report that    has materially affected, or is reasonably likely to materially affect, the    company's internal control over financial reporting; and                                                                           |
| 5. | The    company's other certifying officer and I have disclosed, based on our most    recent evaluation of internal control over financial reporting, to the    company's auditors and the audit committee of the company's board of    directors (or persons performing the equivalent functions): |
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|   | (a) | All    significant deficiencies and material weaknesses in the design or operation    of internal control over financial reporting which are reasonably likely to    adversely affect the company's ability to record, process, summarize and    report financial information; and |
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|   | (b) | Any    fraud, whether or not material, that involves management or other employees    who have a significant role in the company's internal control over financial    reporting.                                                                                                   |

 
| Date:  April 28, 2009 | /s/ S. GOPALAKRISHNAN**S. Gopalakrishnan**      Chief Executive Officer |
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