Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-10197         

        Nuveen California Dividend Advantage Municipal Fund 2         
(Exact name of registrant as specified in charter)


        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Jessica R. Droeger—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            8/31          

Date of reporting period:          11/30/05         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

  Portfolio of Investments (Unaudited)
Nuveen California Dividend Advantage Municipal Fund 2 (NVX)
November 30, 2005

Principal  Optional Call    Market 
Amount (000)  Description(1)  Provisions*  Ratings**  Value 
  Consumer Staples - 5.2% (3.6% of Total Investments)      
$ 4,625  California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Stanislaus 6/12 at 100.00  Baa3  $ 4,699,463 
  County Tobacco Funding Corporation, Series 2002A, 5.500%, 6/01/33      
825  California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Sonoma 6/15 at 100.00  BBB  794,574 
  County Tobacco Securitization Corporation, Series 2005, 4.250%, 6/01/21      
3,200  Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed Bonds, 6/13 at 100.00  BBB  3,475,808 
  Series 2003A-1, 6.250%, 6/01/33      
2,800  Tobacco Securitization Authority of Southern California, Tobacco Settlement Asset-Backed Bonds, San 6/12 at 100.00  BBB  2,837,380 
  Diego County Tobacco Asset Securitization Corporation, Senior Series 2001A, 5.500%, 6/01/36      
  Education and Civic Organizations - 14.9% (10.1% of Total Investments)      
2,000  California Educational Facilities Authority, Revenue Bonds, Stanford University, Series 2001Q, 6/11 at 101.00  AAA  2,105,160 
  5.250%, 12/01/32      
6,375  California Educational Facilities Authority, Student Loan Revenue Bonds, Cal Loan Program, Series 3/08 at 102.00  Aaa  6,634,654 
  2001A, 5.400%, 3/01/21 (Alternative Minimum Tax) - MBIA Insured      
  California State Public Works Board, Lease Revenue Bonds, University of California System, Series      
  2002A:      
8,880  5.375%, 10/01/16 - FSA Insured 10/12 at 100.00  AAA  9,586,937 
10,570  5.375%, 10/01/18 - FSA Insured 10/12 at 100.00  AAA  11,362,539 
620  California Statewide Community Development Authority, Revenue Bonds, Notre Dame de Namur 10/13 at 100.00  N/R  634,235 
  University, Series 2003, 6.500%, 10/01/23      
3,000  Long Beach Bond Financing Authority, California, Lease Revenue Refunding Bonds, Long Beach Aquarium 11/11 at 101.00  AAA  3,135,120 
  of the South Pacific, Series 2001, 5.250%, 11/01/30 - AMBAC Insured      
  Healthcare - 9.0% (6.2% of Total Investments)      
2,000  California Health Facilities Financing Authority, Revenue Bonds, Casa Colina Inc., Series 2001, 4/12 at 100.00  BBB+  2,131,320 
  6.000%, 4/01/22      
825  California Health Facilities Financing Authority, Revenue Bonds, Cedars-Sinai Medical Center, 11/15 at 100.00  A3  833,564 
  Series 2005, 5.000%, 11/15/34      
500  California Infrastructure Economic Development Bank, Revenue Bonds, Kaiser Hospital Assistance LLC, 8/11 at 102.00  A+  522,355 
  Series 2001A, 5.550%, 8/01/31      
955  California State Public Works Board, Revenue Bonds, University of California - Davis Medical 11/14 at 100.00  AAA  996,504 
  Center, Series 2004II-A, 5.000%, 11/01/22 - MBIA Insured      
  California Statewide Community Development Authority, Revenue Bonds, Daughters of Charity Health      
  System, Series 2005A:      
330  5.250%, 7/01/24 7/15 at 100.00  BBB+  340,138 
190  5.250%, 7/01/35 7/15 at 100.00  BBB+  192,865 
5,355  California Statewide Community Development Authority, Revenue Bonds, Kaiser Permanente System, No Opt. Call  A+  5,504,512 
  Series 2002E, 4.700%, 11/01/36 (Mandatory put 5/31/09)      
2,185  California Statewide Community Development Authority, Health Facility Revenue Refunding Bonds, No Opt. Call  A+  2,423,143 
  Memorial Health Services, Series 2003A, 6.000%, 10/01/11      
2,500  California Statewide Community Development Authority, Hospital Revenue Bonds, Monterey Peninsula 6/13 at 100.00  AAA  2,671,575 
  Hospital, Series 2003B, 5.250%, 6/01/18 - FSA Insured      
3,000  Central California Joint Powers Health Finance Authority, Certificates of Participation, Community  2/10 at 101.00  Baa2  3,127,200 
  Hospitals of Central California Obligated Group, Series 2000, 6.000%, 2/01/30       
1,500  Whittier, California, Health Facility Revenue Bonds, Presbyterian Intercommunity Hospital, Series  6/12 at 101.00  A  1,589,700 
  2002, 5.600%, 6/01/22       
  Housing/Multifamily - 11.5% (7.8% of Total Investments)       
2,450  ABAG Finance Authority for Non-Profit Corporations, California, Multifamily Housing Revenue  No Opt. Call  Baa2  2,582,251 
  Refunding Bonds, United Dominion/2000 Post Apartments, Series 2000B, 6.250%, 8/15/30 (Mandatory       
  put 8/15/08)       
3,250  California Statewide Community Development Authority, Revenue Refunding Bonds, Irvine Apartment  7/08 at 101.00  BBB  3,319,323 
  Communities Development, Series 1998A, 4.900%, 5/15/25 (Mandatory put 5/15/08)       
5,962  California Statewide Community Development Authority, Multifamily Housing Revenue Refunding Bonds,  6/11 at 102.00  AAA  6,365,687 
  Claremont Village Apartments, Series 2001D, 5.500%, 6/01/31 (Alternative Minimum Tax) (Mandatory       
  put 6/01/16)       
3,475  California Statewide Community Development Authority, GNMA Collateralized Housing Revenue Refunding  8/12 at 105.00  Aaa  3,854,852 
  Bonds, Crowne Pointe Project, Series 2002F, 6.750%, 8/20/37       
4,000  Daly City Housing Development Finance Agency, California, Mobile Home Park Revenue Bonds,  12/13 at 102.00  A-  4,389,760 
  Franciscan Mobile Home Park Project, Series 2002A, 5.850%, 12/15/32       
1,055  Rohnert Park Finance Authority, California, Senior Lien Revenue Bonds, Rancho Feliz Mobile Home  9/13 at 100.00  BBB  1,139,421 
  Park, Series 2003A, 5.750%, 9/15/38       
700  Rohnert Park Finance Authority, California, Subordinate Lien Revenue Bonds, Rancho Feliz Mobile  9/13 at 100.00  N/R  751,625 
  Home Park, Series 2003B, 6.625%, 9/15/38       
3,045  Yucaipa Redevelopment Agency, California, Mobile Home Park Revenue Bonds, Rancho del Sol and  5/11 at 102.00  N/R  3,424,955 
  Grandview, Series 2001A, 6.750%, 5/15/36       
  Housing/Single Family - 0.4% (0.3% of Total Investments)       
960  California Rural Home Mortgage Finance Authority, Mortgage-Backed Securities Program Single Family  6/11 at 102.00  AAA  969,341 
  Mortgage Revenue Bonds, Series 2001A, 5.650%, 12/01/31 (Alternative Minimum Tax)       
  Long-Term Care - 0.7% (0.5% of Total Investments)       
1,550  California Health Facilities Financing Authority, Cal-Mortgage Insured Revenue Bonds, Northern  1/13 at 100.00  A  1,603,878 
  California Retired Officers Community Corporation - Paradise Valley Estates, Series 2002, 5.125%,       
  1/01/22       
  Tax Obligation/General - 23.8% (16.2% of Total Investments)       
5,000  California, General Obligation Refunding Bonds, Series 2002, 5.000%, 2/01/12  No Opt. Call  A  5,338,300 
4,225  California, General Obligation Veterans Welfare Bonds, Series 2001BV, 5.600%, 12/01/32 - FSA  6/06 at 101.00  AAA  4,309,416 
  Insured       
  California, General Obligation Bonds, Series 2003:       
3,000  5.250%, 2/01/20  8/13 at 100.00  A  3,195,420 
1,400  5.250%, 2/01/21  8/13 at 100.00  A  1,489,320 
1,350  California, General Obligation Bonds, Series 2004, 5.125%, 4/01/25  4/14 at 100.00  A  1,413,288 
3,615  Colton Joint Unified School District, San Bernardino County, California, General Obligation Bonds,  8/12 at 102.00  AAA  4,000,721 
  Series 2002A, 5.500%, 8/01/22 - FGIC Insured       
  Contra Costa County Community College District, California, General Obligation Bonds, Series 2002:       
3,005  5.000%, 8/01/21 - FGIC Insured  8/12 at 100.00  AAA  3,158,736 
3,300  5.000%, 8/01/22 - FGIC Insured  8/12 at 100.00  AAA  3,456,288 
1,325  Golden West Schools Financing Authority, California, General Obligation Revenue Refunding Bonds,  No Opt. Call  AAA  1,579,162 
  School District Program, Series 1998A, 6.650%, 8/01/13 - MBIA Insured       
1,445  Los Angeles Community College District, Los Angeles County, California, General Obligation Bonds,  8/15 at 100.00  AAA  1,513,175 
  Series 2005A, 5.000%, 6/01/26 - FSA Insured       
10,840  Los Angeles Unified School District, California, General Obligation Bonds, Series 2002E, 5.000%,  7/12 at 100.00  AAA  11,447,040 
  7/01/19 - MBIA Insured       
1,250  Los Angeles Unified School District, California, General Obligation Bonds, Series 2003A, 5.250%,  7/13 at 100.00  AAA  1,349,625 
  7/01/20 - FSA Insured       
1,375  Lucia Mar Unified School District, San Luis Obispo County, California, General Obligation Bonds,  8/14 at 100.00  Aaa  1,487,750 
  Series 2004A, 5.250%, 8/01/21 - FGIC Insured       
  Oakland Unified School District, Alameda County, California, General Obligation Bonds, Series 2005:       
475  5.000%, 8/01/25 - MBIA Insured  8/15 at 100.00  AAA  496,270 
500  5.000%, 8/01/26 - MBIA Insured  8/15 at 100.00  AAA  521,990 
2,000  Puerto Rico, General Obligation and Public Improvement Bonds, Series 2001A, 5.500%, 7/01/20 - MBIA  No Opt. Call  AAA  2,284,880 
  Insured       
  San Jose-Evergreen Community College District, Santa Clara County, California, General Obligation       
  Bonds, Series 2005A:       
370  5.000%, 9/01/25 - MBIA Insured  9/15 at 100.00  AAA  387,875 
545  5.000%, 9/01/27 - MBIA Insured  9/15 at 100.00  AAA  569,569 
4,050  Santa Rosa High School District, Sonoma County, California, General Obligation Bonds, Series 2001,  5/11 at 101.00  AAA  4,309,281 
  5.300%, 5/01/26 - FGIC Insured       
1,160  Saugus Union School District, Los Angeles County, California, General Obligation Bonds, Series  8/12 at 100.00  AAA  1,219,346 
  2002A, 5.000%, 8/01/21 - FGIC Insured       
  Tax Obligation/Limited - 28.7% (19.5% of Total Investments)       
  Beaumont Financing Authority, California, Local Agency Revenue Bonds, Series 2004D:       
650  5.500%, 9/01/24  9/14 at 102.00  N/R  665,581 
385  5.800%, 9/01/35  9/14 at 102.00  N/R  397,559 
4,000  California, Economic Recovery Revenue Bonds, Series 2004A, 5.000%, 7/01/15  7/14 at 100.00  AA-  4,304,680 
4,900  California State Public Works Board, Lease Revenue Bonds, Department of Corrections, Series 2003C,  12/13 at 100.00  A-  5,306,651 
  5.500%, 6/01/16       
1,200  Capistrano Unified School District, Orange County, California, Special Tax Bonds, Community  9/13 at 100.00  N/R  1,260,888 
  Facilities District 90-2 - Talega, Series 2003, 6.000%, 9/01/33       
4,845  Encinitas Public Financing Authority, California, Lease Revenue Bonds, Acquisition Project, Series  4/08 at 102.00  AAA  5,090,787 
  2001A, 5.250%, 4/01/31 - MBIA Insured       
750  Fontana, California, Special Tax Bonds, Sierra Community Facilities District 22, Series 2004,  9/14 at 100.00  N/R  786,585 
  6.000%, 9/01/34       
335  Hesperia Community Redevelopment Agency, California, Tax Allocation Bonds, Series 2005A, 5.000%,  9/15 at 100.00  AAA  352,815 
  9/01/20 - XLCA Insured       
4,000  Industry Urban Development Agency, California, Tax Allocation Refunding Bonds, Civic, Recreational  5/07 at 101.50  AAA  4,180,200 
  and Industrial Redevelopment Project 1, Series 2002, 5.500%, 5/01/19 - MBIA Insured       
2,000  Lake Elsinore Public Financing Authority, California, Local Agency Revenue Refunding Bonds, Series  10/13 at 102.00  N/R  2,177,840 
  2003H, 6.000%, 10/01/20       
1,265  Lee Lake Water District, Riverside County, California, Special Tax Bonds, Community Facilities  9/13 at 102.00  N/R  1,393,815 
  District 1 of Sycamore Creek, Series 2003, 6.500%, 9/01/24       
1,320  Lincoln, California, Special Tax Bonds, Lincoln Crossing Community Facilities District 03-1, Series  9/13 at 102.00  N/R  1,443,724 
  2003A, 6.500%, 9/01/25       
1,000  Lincoln, California, Special Tax Bonds, Lincoln Crossing Community Facilities District 03-1, Series  9/13 at 102.00  N/R  1,060,890 
  2004, 6.000%, 9/01/34       
8,000  Los Angeles County Metropolitan Transportation Authority, California, Proposition C Second Senior  7/08 at 101.00  AAA  8,293,600 
  Lien Sales Tax Revenue Refunding Bonds, Series 1998A, 5.000%, 7/01/23 - AMBAC Insured       
5,000  Los Angeles County Metropolitan Transportation Authority, California, Proposition C Second Senior  No Opt. Call  AAA  5,503,200 
  Lien Sales Tax Revenue Refunding Bonds, Series 2003A, 5.250%, 7/01/13 - MBIA Insured       
3,295  Oakland Redevelopment Agency, California, Subordinate Lien Tax Allocation Bonds, Central District  3/13 at 100.00  AAA  3,603,709 
  Redevelopment Project, Series 2003, 5.500%, 9/01/16 - FGIC Insured       
2,000  Orange County, California, Special Tax Bonds, Community Facilities District 02-1 of Ladera Ranch,  8/11 at 101.00  N/R  2,033,960 
  Series 2003A, 5.550%, 8/15/33       
2,000  Puerto Rico Public Finance Corporation, Commonwealth Appropriation Bonds, Series 2002E, 6.000%,  No Opt. Call  BBB-  2,348,600 
  8/01/26       
385  Rialto Redevelopment Agency, California, Tax Allocation Bonds, Merged Project Area, Series 2005A,  9/15 at 100.00  AAA  391,965 
  5.000%, 9/01/35 - XLCA Insured       
6,000  Riverside County Redevelopment Agency, California, Tax Allocation Bonds, Jurupa Valley Project  10/11 at 102.00  AAA  6,324,420 
  Area, Series 2001, 5.250%, 10/01/35 - AMBAC Insured       
800  Riverside County Public Financing Authority, California, Tax Allocation Bonds, Multiple Projects,  10/15 at 100.00  AAA  815,832 
  Series 2005A, 5.000%, 10/01/35 - XLCA Insured       
700  Sacramento, California, Special Tax Bonds, North Natomas Community Facilities District 4, Series  9/14 at 100.00  N/R  744,226 
  2003C, 6.000%, 9/01/33       
1,530  San Marcos Public Facilities Authority, California, Tax Allocation Bonds, Project Areas 2 and 3,  8/15 at 100.00  AAA  1,559,238 
  Series 2005C, 5.000%, 8/01/35 - AMBAC Insured       
975  San Marcos Public Facilities Authority, California, Special Tax Bonds, Community Facilities  9/09 at 102.00  N/R  1,020,406 
  District 99-1, Series 2003B, 6.000%, 9/01/24       
1,930  West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities District  9/13 at 103.00  N/R  2,064,888 
  01-1, Series 2003B, 6.750%, 9/01/30       
850  West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities District  9/13 at 103.00  N/R  892,602 
  2001-1, Series 2004A, 6.125%, 9/01/39       
500  West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities District  9/13 at 102.00  N/R  518,055 
  01-1, Series 2004B, 6.000%, 9/01/39       
  Transportation - 9.0% (6.1% of Total Investments)       
7,000  Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Refunding Bonds,  1/14 at 101.00  BBB-  5,972,890 
  Series 1999, 0.000%, 1/15/27       
5,585  Port of Oakland, California, Revenue Bonds, Series 2002N, 5.000%, 11/01/16 (Alternative Minimum  11/12 at 100.00  AAA  5,828,562 
  Tax) - MBIA Insured       
2,000  San Francisco Airports Commission, California, Revenue Refunding Bonds, San Francisco International  5/12 at 100.00  AAA  2,101,520 
  Airport, Second Series 2002, Issue 28A, 5.250%, 5/01/17 (Alternative Minimum Tax) - MBIA Insured       
  San Francisco Airports Commission, California, Revenue Bonds, San Francisco International Airport,       
  Second Series 2003, Issue 29A:       
2,430  5.250%, 5/01/18 (Alternative Minimum Tax) - FGIC Insured  5/13 at 100.00  AAA  2,563,383 
2,555  5.250%, 5/01/19 (Alternative Minimum Tax) - FGIC Insured  5/13 at 100.00  AAA  2,688,627 
1,000  San Francisco Airports Commission, California, Revenue Bonds, San Francisco International Airport,  5/13 at 100.00  AAA  1,063,980 
  Second Series 2003, Issue 29B, 5.125%, 5/01/17 - FGIC Insured       
  U.S. Guaranteed*** - 25.0% (17.0% of Total Investments)       
9,000  Anitoch Area Public Facilities Financing Agency, California, Special Tax Bonds, Community  8/11 at 100.00  AAA  9,791,100 
  Facilities District 1989-1, Series 2001, 5.250%, 8/01/25 (Pre-refunded to 8/01/11) - MBIA Insured       
6,000  California Department of Water Resources, Power Supply Revenue Bonds, Series 2002A, 5.125%,  5/12 at 101.00  A2***  6,531,120 
  5/01/18 (Pre-refunded to 5/01/12)       
8,230  Los Angeles Unified School District, California, General Obligation Bonds, Series 2000D, 5.375%,  7/10 at 100.00  AAA  8,938,274 
  7/01/25 (Pre-refunded to 7/01/10) - FGIC Insured       
  Santa Clara Valley Transportation Authority, California, Sales Tax Revenue Bonds, Series 2001A:       
15,090  5.000%, 6/01/25 (Pre-refunded to 6/01/11) - MBIA Insured  6/11 at 100.00  AAA  16,202,284 
2,000  5.000%, 6/01/26 (Pre-refunded to 6/01/11) - MBIA Insured  6/11 at 100.00  AAA  2,147,420 
6,200  Southwestern Community College District, San Diego County, California, General Obligation Bonds,  8/11 at 101.00  AAA  6,835,314 
  Series 2001, 5.375%, 8/01/25 (Pre-refunded to 8/01/11) - AMBAC Insured       
2,710  Southwestern Community College District, San Diego County, California, General Obligation Bonds,  8/14 at 100.00  AAA  2,858,969 
  Series 2004, 5.000%, 8/01/21 - FGIC Insured       
3,000  Northern California Tobacco Securitization Authority, Tobacco Settlement Asset-Backed Bonds, Series  6/11 at 100.00  BBB***  3,018,420 
  2001A, 5.375%, 6/01/41 (Pre-refunded to 6/01/11)     
  Utilities - 5.0% (3.5% of Total Investments)     
5,000  Anaheim Public Finance Authority, California, Second Lien Electric Distribution Revenue Bonds,  10/14 at 100.00  AAA  5,374,350
  Series 2004, 5.250%, 10/01/21 - MBIA Insured     
  Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series 2003A-2:     
750  5.000%, 7/01/21 - MBIA Insured  7/13 at 100.00  AAA  791,797
1,000  5.000%, 7/01/23 - MBIA Insured  7/13 at 100.00  AAA  1,051,610
790  Merced Irrigation District, California, Electric System Revenue Bonds, Series 2005, 5.125%,  9/15 at 100.00  AAA  817,530
  9/01/31 - XLCA Insured     
1,000  Merced Irrigation District, California, Revenue Certificates of Participation, Electric System  1/06 at 103.00  Baa3***  1,031,230
  Project, Series 2002, 6.500%, 9/01/34 (Pre-refunded to 1/12/06)     
2,000  Santa Clara, California, Subordinate Electric Revenue Bonds, Series 2003A, 5.250%, 7/01/20 - MBIA  7/13 at 100.00  AAA  2,156,700
  Insured     
  Water and Sewer - 13.6% (9.2% of Total Investments)     
2,740  California Department of Water Resources, Water System Revenue Bonds, Central Valley Project,  12/12 at 100.00  AAA  2,908,483
  Series 2002Z, 5.000%, 12/01/18 - FGIC Insured     
4,900  East Bay Municipal Utility District, Alameda and Contra Costa Counties, California, Water System  6/11 at 100.00  AAA  5,043,521
  Subordinated Revenue Bonds, Series 2001, 5.000%, 6/01/26 - MBIA Insured     
2,655  El Dorado Irrigation District, California, Water and Sewer Certificates of Participation, Series  3/14 at 100.00  AAA  2,787,511
  2004A, 5.000%, 3/01/20 - FGIC Insured     
1,700  San Buenaventura, California, Wastewater Revenue Certificates of Participation, Series 2004,  3/14 at 100.00  AAA  1,760,910
  5.000%, 3/01/24 - MBIA Insured     
6,885  San Diego Public Facilities Financing Authority, California, Subordinate Lien Water Revenue Bonds,  8/12 at 100.00  AAA  7,237,230
  Series 2002, 5.000%, 8/01/21 - MBIA Insured     
10,000  San Francisco City and County Public Utilities Commission, California, Clean Water Revenue  4/13 at 100.00  AAA  10,774,200
  Refunding Bonds, Series 2003A, 5.250%, 10/01/20 - MBIA Insured     
$ 311,747  Total Long-Term Investments (cost $315,461,778) - 146.8%      330,340,943
  Other Assets Less Liabilities - 2.1%      4,740,221
  Preferred Shares, at Liquidation Value - (48.9)%      (110,000,000)
  Net Assets Applicable to Common Shares - 100%      $ 225,081,164

(1 )  All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares 
  unless otherwise noted. 
*   Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There 
  may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be 
  subject to periodic principal paydowns. 
**   Ratings: Using the higher of Standard & Poor's or Moody's rating. 
***   Securities are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency 
  securities which ensures the timely payment of principal and interest. Such securities are normally considered 
  to be equivalent to AAA rated securities. 
N/R   Investment is not rated. 

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount and timing differences in recognizing certain gains and losses on investment transactions.

At November 30, 2005, the cost of investments was $315,449,877.

Gross unrealized appreciation and gross unrealized depreciation of investments at November 30, 2005, were as follows:

Gross unrealized:   
Appreciation  $ 15,157,794  
Depreciation  (266,728 ) 
Net unrealized appreciation (depreciation) of investments  $ 14,891,066  

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen California Dividend Advantage Municipal Fund 2        

By (Signature and Title)*          /s/ Jessica R. Droeger                     
                                                    Jessica R. Droeger
                                                    Vice President and Secretary

Date         1/27/06        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*         /s/ Gifford R. Zimmerman                    
                                                   Gifford R. Zimmerman
                                                   Chief Administrative Officer (principal executive officer) 

Date         1/27/06        

By (Signature and Title)*         /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                   Vice President and Controller (principal financial officer) 

Date         1/27/06        

* Print the name and title of each signing officer under his or her signature.