CERTIFICATE OF DESIGNATIONS, PREFERENCES AND OTHER RIGHTS
                         OF THE SERIES A PREFERRED STOCK
                               OF XIOX CORPORATION

                        Pursuant to Section 151(g) of the
                        Delaware General Corporations Law

         It is hereby certified that:

         I. The name of the corporation is Xiox Corporation (the "Corporation"),
a Delaware corporation.

         II.  Set  forth  hereinafter  is a  statement  of  the  voting  powers,
preferences, limitations,  restrictions, and relative rights of shares of Series
A  Convertible  Preferred  Stock  hereinafter   designated  as  contained  in  a
resolution  of  the  Board  of  Directors  of the  Corporation  (the  "Board  of
Directors")  pursuant to the authority  conferred upon the Board of Directors by
the  Certificate  of  Incorporation   of  the   Corporation,   as  amended  (the
"Certificate  of  Incorporation"),  and in accordance with Section 151(g) of the
Delaware  General  Corporations  Law,  which  resolution was duly adopted by the
Board of Directors on September  10, 1998,  and remains in full force and effect
as of the date hereof:

SERIES A PREFERRED STOCK

         Section 1.  Designation.  The series of Preferred  Stock hereby created
shall be designated  and known as the "Series A Preferred  Stock." The number of
shares constituting such series shall be 1,907,989.

         Section 2. Liquidation Rights.

                           2.1 In the  event  of any  voluntary  or  involuntary
liquidation,  dissolution or winding up of the affairs of the Corporation,  each
holder of shares of Series A Preferred Stock shall be entitled to receive, prior
and in preference to the payment of any liquidation amount to the holders of the
Corporation's  common  stock,  par value  $0.01 per share  ("Common  Stock"),  a
payment equal to the purchase price  originally  paid for the Series A Preferred
Stock upon issuance (the "Purchase Price") together with any declared but unpaid
dividends  thereon,  before any payment is made to the  holders of common  stock
(the "Preference  Amount").  After the full Preference Amount on all outstanding
shares of the Series A Preferred  Stock has been paid,  any remaining  funds and
assets of the  Corporation  legally  available for  distribution to stockholders
shall be  distributed  pro rata among the  holders of the Common  Stock.  If the
Corporation has insufficient  assets to permit payment of the Preference  Amount
in full to all Series A  Preferred  Stock  stockholders,  then the assets of the
Corporation  shall  be  distributed  ratably  to the  holders  of the  Series  A
Preferred Stock and the holders of shares of any other series of Preferred Stock
on a parity with the Series A Preferred  Stock in proportion  to the  Preference
Amount each such holder would otherwise be entitled to receive.






                           2.2 A merger or consolidation of the Corporation,  or
sale of the Corporation's Common Stock (including, without limitation,  pursuant
to a tender offer) in any single transaction or series of related  transactions,
in any such case in which  its  stockholders  do not  retain a  majority  of the
voting power in the surviving corporation, or a sale of all or substantially all
the Corporation's assets, shall each be deemed to be a liquidation,  dissolution
or winding up of the Corporation.

         Section 3. Conversion.

                           3.1  Voluntary  Conversion.  Each  share of  Series A
Preferred Stock will be convertible, at the option of the holder thereof, at the
office of the  Corporation  or any transfer  agent for such shares,  into Common
Stock.  The  number of shares of Common  Stock into which each share of Series A
Preferred  Stock will be converted  will be equal to the Purchase  Price of such
share divided by the Conversion  Price (as  hereinafter  defined) of such share.
The initial Conversion Price for each share of Series A Preferred Stock shall be
an amount equal to the Purchase Price of such share.  The Conversion Price shall
be subject to adjustment as provided in Section 3.3.

                           3.2 Mechanics of Conversion.  No fractional shares of
Common Stock shall be issued upon  conversion  of Series A Preferred  Stock.  In
lieu of any fractional  shares to which the holder would  otherwise be entitled,
the  Corporation  shall pay cash equal to such  fraction  multiplied by the then
fair market value of one share of Common Stock, as reasonably determined in good
faith by the Board of Directors.  Before any holder of Series A Preferred  Stock
shall be entitled to receive  certificates for the shares of Common Stock issued
upon conversion, such holder shall surrender the certificate or certificates for
the shares of Series A Preferred Stock being  converted,  duly endorsed,  at the
principal  office of the  Corporation  and shall  state  therein its name or the
name,  or  names,  of its  nominees  in  which  it  wishes  the  certificate  or
certificates for shares of Common Stock to be issued.  The Corporation shall, as
soon as practicable thereafter,  issue and deliver at such office to such holder
of  Series  A  Preferred  Stock  or to such  holder's  nominee  or  nominees,  a
certificate  or  certificates  for the number of shares of Common Stock to which
such holder or such holder's  nominee  shall be entitled as aforesaid,  together
with cash in lieu of any  fraction  of a share of Common  Stock.  Subject to the
foregoing,  such  conversion  shall be deemed to have been made  immediately and
upon surrender of the certificate  representing the shares of Series A Preferred
Stock to be converted in the case of a voluntary  conversion pursuant to Section
3.1.  The  Person or Persons  entitled  to  receive  the shares of Common  Stock
issuable upon conversion  shall be treated for all purposes as the record holder
or holders of such shares of Common Stock on such date.

                           3.3 Adjustments to Conversion  Price.  The Conversion
Price shall be subject to adjustment from time to time as follows:

                                    (a) If the Corporation shall issue shares of
Common Stock to the holders of Common Stock as a dividend or stock split,  or in
the event  that the  Corporation  reduces  the number of  outstanding  shares of
Common Stock in a reverse stock split or stock combination,  then the Conversion
Price  shall be  adjusted  such that the holders of shares of Series A Preferred
Stock shall  receive,  upon  conversion  of the Series A Preferred  Stock,  that
number of shares of Common  Stock that such  holder  would have owned  following
such dividend, stock split, reverse stock split or stock

                                       -2-




combination if such conversion had occurred immediately prior to the record date
for such stock split,  stock dividend,  reverse stock split or stock combination
of the Common Stock, as the case may be. If the  Corporation  shall issue shares
of Series A  Preferred  Stock to the  holders of Series A  Preferred  Stock as a
stock dividend or stock split, or in the event that the Corporation  reduces the
number of  outstanding  shares of Series A  Preferred  Stock in a reverse  stock
split or stock  combination,  then the  Conversion  Price shall be adjusted such
that the  holder of  shares of Series A  Preferred  Stock  shall  receive,  upon
conversion of the Series A Preferred Stock, the number of shares of Common Stock
that such holder would have owned if such  conversion  had occurred  immediately
prior to the record date for such stock split,  stock  dividend,  reverse  stock
split or stock  combination of the Series A Preferred Stock, as the case may be.
In the event of a reclassification  or other similar  transaction as a result of
which  shares of Common Stock are  converted  into  another  security,  then the
Conversion Price shall be determined such that the holders of shares of Series A
Preferred Stock shall receive, upon conversion of such Series A Preferred Stock,
the number of such  securities  that such holder would have owned following such
conversion  of the Common Stock into  another  security if such  conversion  had
occurred immediately prior to the record date of such  reclassification or other
similar transaction.  No adjustments with respect to dividends (other than stock
dividends)  shall be made upon  conversion  of any  share of Series A  Preferred
Stock;  provided,  however, that if a share of Series A Preferred Stock shall be
converted  subsequent  to the record date for the  payment of a dividend  (other
than a stock  dividend)  or other  distribution  on shares of Series A Preferred
Stock but prior to such payment, then the registered holder of such share at the
close of business on such record date shall be entitled to receive the  dividend
(other than a stock  dividend)  or other  distribution  payable on such share on
such date notwithstanding the conversion thereof or the Corporation's default in
payment of the dividend (other than a stock dividend) due on such date.

                                    (b) Upon the issuance by the  Corporation of
Equity Securities (as defined in Section 3.3(b)(ii)(A) below) at a consideration
per share  less than the  Conversion  Price of the Series A  Preferred  Stock in
effect  immediately  prior to the time of such  issue  or  sale,  other  than an
issuance of stock or securities pursuant to Section 3.3(a) above or the issuance
of shares of Common  Stock upon  conversion  of any shares of Series A Preferred
Stock,  then forthwith upon such issue or sale, such  Conversion  Price shall be
reduced to a price (calculated to the nearest hundredth of a cent) determined by
dividing:

                                             (i) an  amount  equal to the sum of
(x) the number of shares of Common Stock  outstanding  immediately prior to such
issue or sale multiplied by the Conversion Price in effect  immediately prior to
such  adjustment,  (y) the  number  of  shares of  Common  Stock  issuable  upon
conversion  or exchange of any  obligations  or  securities  of the  Corporation
outstanding  immediately  prior to such adjustment  multiplied by the Conversion
Price in effect immediately prior to such adjustment, and (z) an amount equal to
the aggregate  "consideration  actually  received" by the Corporation  upon such
issue or sale; by

                                             (ii)  the  sum  of  the  number  of
shares of Common Stock outstanding  immediately after such issue or sale and the
number of shares of Common Stock  issuable  upon  conversion  or exchange of any
such obligations or securities of the Corporation outstanding

                                       -3-




immediately after such issue or sale.

                  For purposes of this  Section  3.3(b),  the follow  provisions
shall be applicable:

                                                      (A)   The   term   "Equity
Securities"  as used in this  Section  3.3(b)  shall  mean any  shares of Common
Stock,  or any  obligation,  or any  share of stock  or  other  security  of the
Corporation convertible into or exchangeable for Common Stock, except for shares
of Common  Stock or  options  to  purchase  Common  Stock  issued or  granted to
officers,  directors or employees of the Corporation and its subsidiaries either
pursuant to any stock  purchase or stock  option plan or other  incentive  stock
arrangement approved by the Corporation's Board of Directors.

                                                      (B) The  case of an  issue
or sale  for  cash of  shares  of  Common  Stock,  the  "consideration  actually
received" by the  Corporation  therefor shall be deemed to be the amount of cash
received,  before  deducting  therefrom any  commissions or expenses paid by the
Corporation.

                                                      (C)   In   case   of   the
issuance   (otherwise  than  upon  conversion  or  exchange  of  obligations  or
securities  of the  Corporation)  of  additional  shares of  Common  Stock for a
consideration  other than cash or a  consideration  partly other than cash,  the
amount of  consideration  other than cash received by the  Corporation  for such
shares shall be deemed to be the value of such  consideration  as  determined in
good faith by the Board of Directors.

                                                      (D)   In   case   of   the
issuance by the  Corporation  in any manner of any rights to subscribe for or to
purchase  shares of Common  Stock,  or any options for the purchase of shares of
Common Stock or stock  convertible into Common Stock, all shares of Common Stock
or stock  convertible  into Common  Stock to which the holders of such rights or
options shall be entitled to subscribe  for or purchase  pursuant to such rights
or options shall be deemed  "outstanding" as of the date of the offering of such
rights or the  granting  of such  options,  as the case may be, and the  minimum
aggregate consideration named in such rights or options for the shares of Common
Stock  or  stock  convertible  into  Common  Stock  covered  thereby,  plus  the
consideration,  if any,  received by the Corporation for such rights or options,
shall be deemed to be the  "consideration  actually received" by the Corporation
(as of the date of the offering of such rights or the granting of such  options,
as the case may be) for the issuance of such shares.

                                                      (E)   In   case   of   the
issuance or issuances by the  Corporation in any manner of any obligations or of
any securities of the Corporation that shall be convertible into or exchangeable
for Common Stock,  all shares of Common Stock  issuable  upon the  conversion or
exchange of such obligations or securities shall be deemed issued as of the date
such obligations or securities are issued,  and the amount of the "consideration
actually received" by the Corporation for such additional shares of Common Stock
shall be deemed to be the total of (x) the amount of  consideration  received by
the Corporation  upon the issuance of such  obligations or securities,  plus (y)
the minimum  aggregate  consideration,  if any,  other than such  obligations or
shares,  receivable by the Corporation upon such conversion or exchange,  except
in adjustment of dividends.

                                       -4-




                                                      (F)  The   amount  of  the
"consideration actually received" by the Corporation upon issuance of any rights
or options  referred  to in  subsection  (D) above or upon the  issuance  of any
obligations or securities  that are  convertible or exchangeable as described in
subsection (E) above,  and the amount of the  consideration,  if any, other than
such obligations or securities so convertible or exchangeable, receivable by the
Corporation  upon  the  exercise,   conversion  or  exchange  thereof  shall  be
determined  in the same manner  provided in  subsections  (B) and (C) above with
respect to the consideration received by the Corporation in case of the issuance
of  additional  shares  of  Common  Stock;  provided,   however,  that  if  such
obligations or securities so convertible or  exchangeable  are issued in payment
or  satisfaction  of any dividend upon any stock of the  Corporation  other than
Common  Stock,  the  amount  of the  "consideration  actually  received"  by the
Corporation  upon the original  issuance of such  obligations  or  securities so
convertible or exchangeable  shall be deemed to be the value of such obligations
or securities as of the date of the adoption of the  resolution  declaring  such
dividend as  determined  by the Board of Directors at or as of that date. On the
expiration  of any rights or  options  referred  to in  subsection  (D),  or the
termination  of any right of  conversion  or exchange  referred to in subsection
(E),  or any change in the  number of shares of Common  Stock  deliverable  upon
exercise  of such  options  or rights or upon  conversion  or  exchange  of such
convertible or  exchangeable  securities,  the  Conversion  Price then in effect
shall  forthwith be readjusted to such  Conversion  Price as would have obtained
had the  adjustments  made upon the basis of the  delivery of only the number of
shares of Common Stock  actually  delivered or to be delivered upon the exercise
of such rights or options or upon the conversion or exchange of such securities.

                                                      (G)  In  the   event   the
Corporation shall declare a distribution payable in securities of other persons,
evidences of indebtedness issued by the Corporation or other persons,  assets or
options or rights not referred to in this  Section  3.3(b),  then,  in each such
case,  the  holders of the Series A  Preferred  Stock  shall be  entitled to the
distributions  provided  for  in  Section  4  below,  and no  adjustment  to the
Conversion Price provided for in this Section 3.3(b) shall be applicable.

                           3.4 Common  Stock  Reserved.  The  Corporation  shall
reserve and keep available out of its authorized but unissued  Common Stock such
number of shares of Common  Stock as shall,  at all  times,  be  sufficient  for
conversion of all outstanding Series A Preferred Stock.

         Section 4. Dividend Rights.

                           4.1  Generally.  The  holders  of  shares of Series A
Preferred  Stock will be entitled  to  receive,  if, when and as declared by the
Board of Directors,  out of any funds legally available therefor,  noncumulative
dividends  at  the  rate  of 6% of  the  Purchase  Price  per  share  per  annum
(appropriately  adjusted  for stock splits and  combinations)  for each share of
Series A  Preferred  Stock  then held by them.  Such  dividends  may be  payable
quarterly  or  otherwise  as the  Board  of  Directors  may  from  time  to time
determine. Dividends may be declared and paid upon shares of Common Stock in any
fiscal year of the  Corporation,  only if  dividends  shall have been paid to or
declared  and set apart upon all  shares of Series A  Preferred  Stock,  and all
shares of any other  series of  Preferred  Stock on a parity  with the  Series A
Preferred Stock, at its annual rate for each quarter of such fiscal year of the

                                       -5-




Corporation, including the quarter in which such dividends upon shares of Common
Stock are declared. No right shall accrue to holders of Series A Preferred Stock
by reason of the fact that  dividends  on said  shares are not  declared  in any
prior  year,  nor  shall  any  undeclared  or  unpaid  dividends  bear or accrue
interest.

                           4.2  Participation  with  Common.  If any dividend or
other distribution payable in property other than cash is declared on the Common
Stock (excluding any dividend or other  distribution for which adjustment to the
Conversion  Price is provided by Section 3.3), each holder of Series A Preferred
Stock on the record date for such dividend or distribution  shall be entitled to
receive  on the  date of  payment  or  distribution  of such  dividend  or other
distribution  the same  property that such holder would have received if on such
record  date such holder was the holder of record of the number  (including  for
purposes of this  Section 4 any  fraction)  of shares of Common Stock into which
the shares of Series A Preferred Stock then held by such holder are convertible.

         Section 5. Voting Rights.

                           5.1  Generally.  Each  holder  of  shares of Series A
Preferred  Stock shall be entitled to the number of votes equal to the number of
shares of Common Stock into which such shares of Series A Preferred  Stock could
be  converted  on the record  date for the vote or consent of  stockholders  and
shall have voting rights and powers equal to the voting rights and powers of the
Common  Stock.  The  holders  of  shares of Series A  Preferred  Stock  shall be
entitled to notice of any stockholders' meeting in accordance with the Bylaws of
the Corporation  and,  except as provided in Section 5.2 below,  shall vote with
holders of the Common Stock upon any matter submitted to a vote of stockholders,
except those matters required by law to be submitted to a class vote.

                           5.2  Series  Vote.  So long as any shares of Series A
Preferred  Stock are  outstanding,  the  Corporation  shall not,  without  first
obtaining  the approval by vote or written  consent,  in the manner  provided by
law,  of the  holders of at least  two-thirds  of the total  number of shares of
Series A Preferred Stock  outstanding,  voting separately as a single class: (1)
alter or change  any of the  powers,  preferences,  privileges  or rights of the
Series A Preferred  Stock;  (2) create any new class or series of shares  having
preferences  prior to the Series A  Preferred  Stock in any  manner,  including,
without  limitation,  as to dividends or  liquidation;  (3) take any action that
reclassifies any outstanding  shares into shares having preferences prior to the
Series A Preferred Stock in any manner,  including,  without  limitation,  as to
dividends or  liquidation;  or (4) alter or change the Company's  Certificate of
Incorporation  in a manner that  adversely  affected  the rights of the Series A
Preferred Stock.

         Section 6. Redemption.

                           6.1 Redemption  Upon Certain  Events.  Subject to any
legal restrictions on the Corporation's  redemption of shares,  beginning on the
date of completion of the earlier of the following  events (a) the  consummation
of  the  closing  of a  public  offering  of  the  Corporation's  Common  Stock,
registered under the Securities Act of 1933, as amended,  with gross proceeds to
the  Corporation  in excess of $15  million or (b) the date on which the closing
price of the  Corporation's  Common Stock on the Nasdaq  SmallCap Market exceeds
$15/share each day for a period of 15

                                       -6-




consecutive  trading days, the Corporation may elect to redeem all of the Series
A Preferred Stock then outstanding,  provided,  however,  that if any such event
shall  occur  prior to the first  anniversary  of the first  closing  date,  the
Corporation  shall not be entitled to exercise its redemption  rights under this
Section 6 until after such date. The redemption price for each share of Series A
Preferred Stock shall be the Purchase Price for such share plus all declared but
unpaid  dividends  thereon  to the date of  redemption,  as  adjusted  for stock
splits,  stock  dividends,   recapitalizations  and  the  like.  Notwithstanding
anything in the foregoing to the  contrary,  the holder of any share of Series A
Preferred  Stock may elect to convert such share prior to the date of redemption
in accordance with Section 3 hereof.

                           6.2 Notice.  The Corporation shall give notice of any
redemption of the Series A Preferred  Stock pursuant to Section 6.1 by mailing a
copy of such  notice  not less  than  twenty  (20)  business  days  prior to the
redemption  date to the holders of record of the Series A  Preferred  Stock (the
"Redemption  Notice").  The  Corporation  shall mail such notice to the holders'
respective  addresses  appearing  on  the  books  of the  Corporation  or to the
addresses  given by the  holders  to the  Corporation  for the  purpose  of such
notice.

                           6.3  Effect  of   Redemption.   From  and  after  the
redemption,  unless there has been a default in payment of the redemption price,
all dividends,  if any, on the Series A Preferred  Stock redeemed shall cease to
accrue,  all rights of the holders of such  shares  (except the right to receive
the redemption  price without  interest upon  surrender of their  certificate or
certificates) shall cease with respect to such shares, and such shares shall not
thereafter be  transferred  on the books of this  Corporation or be deemed to be
outstanding for any purpose whatsoever.  If the funds of the Corporation legally
available for redemption of shares on the redemption  date are  insufficient  to
redeem the total number of shares of Series A Preferred  Stock to be redeemed on
such date,  then those funds that are legally  available shall be used to redeem
the  maximum  possible  number of the shares  ratably  among the  holders of the
shares to be  redeemed.  Series A  Preferred  Stock not  redeemed  shall  remain
outstanding and entitled to all the rights and preferences provided herein.

         Section 7.  Reservation of Rights.  Pursuant to the authority vested in
it by the  Certificate  of  Incorporation,  the Board of Directors  reserves the
right to designate from time to time one or more additional  series of Preferred
Stock with  powers,  designations,  preferences,  and rights on a parity with or
junior to the Series A Preferred Stock.

         Section  8.  Notices.  In  addition  to any other  notices to which the
holders of Series A Preferred Stock may be entitled  pursuant to the Certificate
of Incorporation, the Bylaws of the Corporation, law, contract or otherwise, the
Corporation  shall cause to be sent to each  holder all  written  communications
sent generally to the holders of Common Stock. The Corporation  shall cause such
communications  to be sent to holders of Series A Preferred  Stock  concurrently
with,  and in the same  manner as, the  sending  of such  communications  to the
holders of Common Stock.

            [The remainder of this page is intentionally left blank.]

                                       -7-




Signed on this 17 day of September, 1998.



                                             XIOX CORPORATION

                                             By: /s/ William H. Welling
                                                --------------------------------
                                                William H. Welling

                                                Chief Executive Officer and
                                                President

ATTEST:
/s/ Melanie D. Reid
- - --------------------------------
Melanie  D. Reid

Chief Financial Officer

                                       -8-