Does 12th PCM marks effects in placements in Engineering??? What are the minimum required marks???

Yes the 12th PCM marks effects in placements in Engineering; minimum 60% marks are required throughout the educational career. Most of the companies want to see the 12th marks for the eligibility criteria but some companies also do not consider the 12th while recruiting people.

If you have 60% marks throughout the career then you are eligible for following MNC (Multinational Companies) in India:

ICICI
Ficosa
General Motors
L'Oréal
Konami
Halliburton
Heineken
Marriott
Lactalis
Mitsubishi Electric
Airbus
Nissan
Vimpelcom
Viettel Mobile
Atari
McDonald's
Philips
PepsiCo
Monsanto Company
Servcorp
Dunkin' Donuts
Assicurazioni Generali
Sony Computer Entertainment
Toyota
Wipro
Sega Sammy Holdings
Lukoil
Tyco
Sasol
Deutsche Telekom
Ferrero
SAS
General Electric
Etisalat
Tesco
Southwest Airlines
ConocoPhillips
Electronic Arts
Fiat
Eni
Hewlett-Packard
Tata Motors
Millipore Corporation
Dow Chemical
Allianz
Knorr (brand)
Cadbury Schweppes
Creative Labs
JPMorgan Chase & Co.
Maggi
NetApp Inc.
Canon Inc
Renault
Coca-Cola
Toshiba
Ingersoll Rand
Kenya Airways
Honda
Motorola
FedEx Express
ExxonMobil
BIDV
Asian Paints
Nike, Inc.
France Télécom
Panasonic Corporation
Sapient Corporation
CMC[disambiguation needed]
DHL
United Airlines
Alstom
Dabur
Credit Suisse
BNP Paribas
Barilla Group
SAP AG
Glaxo Smith Kline
AXA
Danone
Daimler AG
Bridgestone
RICOH
Barrick Gold Corporation
Wal-Mart
EDF
Costco
Leoni AG
Emerson Electric
Martini & Rossi
Ford Motor Company
Procter & Gamble
SABMiller plc
Lagardère
Société Générale
Square Enix
Arcor
Kingston Technology
Bic
Mercedes-AMG
Boeing
IKEA
PSA Peugeot Citroën
Sasken Communication Technologies Limited
Namco Bandai Games
Affiliated Computer Services
Banco Santander
ING Group
Pfizer
Rohde & Schwarz
LiuGong
Gazprom
Facebook
Masterfoods
Accor
Ranbaxy
Hitachi
Cummins
Yakult
Infosys
FPT Group
Capital One
Lockheed Martin
Indesit
Bacardi
Unilever
Royal Dutch Shell
Bayer
Repsol
Celestica
Petrovietnam
Embraer
BASF
Daikin
Krispy Kreme
Honeywell
Parmalat
Sony
Royal Bank of Canada
KPMG
Electrolux
Haier
Hyundai Motor Company
Novartis
Samsung Electronics
Scotiabank
Caterpillar Inc.
Sears
SanDisk
Nestlé
Sony Pictures Entertainment
Hilti
Faber-Castell
Google
Gillette
Enel
Lexmark
Unicredit
FUJITSU
Hutchison Whampoa Limited
Mercedes-Benz
Red Bull
Siemens
News Corporation
Chevron
Epson
Crédit Agricole
Enviroway Bioscience
Vodafone
Ericsson
Robert Bosch GmbH
Akzo Nobel
Rockstar Energy
Activision Blizzard
Alcatel-Lucent
BBVA
Sanofi Aventis
Lenovo
Lear
Ernst & Young
IBM
Nishat Group
Regus
Finmeccanica
American International Group
Isuzu
Pepper Lunch
Telefonica
Dell
Bombardier Inc.
Hearst Corporation
Tejas Networks
Advanced Micro Devices
Starbucks
Deutsche Bank
Huawei
ABN-Amro
Komatsu Limited
Jardine Matheson
Schlumberger
Citigroup
Accenture
Baskin-Robbins
TCS
Hindustan Computers Limited
Schneider Electric
LG Electronics
Gerdau
TRW Automotive
Thomson Reuters
Billabong
Petronas
Aitken Spence
Generali
VNPT
Aditya Birla Group
Mobil
Electronic Data Systems
Johnson & Johnson
Datang Telecom
The Harrison International Group
Cisco Systems
Intesa Sanpaolo
LG
Proton (carmaker)
Microsoft
BMW
Rusal
Mattel
Delta Airlines
Michelin
Total S.A.
Air France-KLM
Altria Group
Oracle Corporation
Cognizant Technology Solutions
HSBC
Namco Bandai Holdings
Sony Music Entertainment
Whirlpool Corporation
Goodyear Tire and Rubber Company
BP (British Petroleum)
Bank of Montreal
Bouygues
Luxottica
Nintendo
Intel Corporation
Black & Decker