CLP – C Certified Professional Programmer Certification

C Certified Professional Programmer (CLP) is a professional certificate that measures your ability to accomplish coding and design tasks related to advanced topics of the C programming language, as well as advanced programming techniques, including the library functions and the usage of the preprocessor.

A test candidate should demonstrate sufficient knowledge of the following concepts:

Handling variable number of parameters (<stdarg.h>)

Low level IO (<unistd.h>)

Memory and strings (<string.h> et al.)

♦ Processes and threads

Floats and ints once again (<math.h>, <fenv.h>, <inttypes.h> et al.)

Network sockets –the absolute basics

Exam name:   CLP – C Certified Professional Programmer
Exam code:   CLP-12-01
Associated certifications:   CLA – C Programming Language Certified Associate
Pre-requisites:   CLA – C Programming Language Certified Associate
Exam version:   12-01 (Published)
Duration:   65 minutes (exam) + 10 minutes (NDA/Tutorial)
Number of questions:   55
Format:   Single-choice, Multiple-choice questions
Passing score:   70%
Full exam price:   USD 295 (see discount information)
Languages:   English

To learn more about exam objectives and study resources, locate a test centre that is near you, or schedule your exam, please click on the buttons below.

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Rescheduling and canceling

C++ candidates must reschedule and cancel exam appointments at least one full business day (24 hours) before the appointment via the Candidate website ( or the Call Centre (+44 161 855 7483). Appointments must be rescheduled within the authorised exam delivery period. All registrations with special requests must be rescheduled or canceled through the Call Centre.

Accommodation of disabilities

C++ Institute will endeavour to accommodate any special requirements. Candidates must submit their requests to C++ Institute (, who will then notify Pearson VUE by email. Special requests may include:

  • 25% time extension;
  • Adjustable font;
  • Adjustable contrast.

No automatic time extension is given to candidates who reside in a country where the first language is not English.

Retake policy

When a candidate fails an exam, he or she must wait 15 days before being allowed to re-sit that exam. There is no limit to the number of times a candidate may retake an exam. No retakes of a passed exam of the same exam version are allowed.

Each candidate who has paid the full exam price (USD 295), or has completed the CLP course in the self-study mode (50% discount voucher) in the C/C++ Education Platform, is eligible for a free retake of the CLP exam. A candidate who meets the above criteria and wants to receive a free voucher to re-sit a failed exam must fill out and submit the Re-take Voucher Request Form no later than 30 days after failing the exam.

A voucher entitling the candidate to a free retake of the exam will be sent within 7 days of receiving the request. The voucher is valid for at least 45 days.


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