Information Security & Fraud Management

Information Security & Fraud Management Interview Questions and Answers

Updated 28 Aug 2016

Q1. malloc vs calloc

Ans.

malloc and calloc are memory allocation functions in C programming language.

  • malloc() allocates memory block of given size and returns a pointer to the first byte of allocated memory.

  • calloc() allocates memory block of given size and initializes all bits to zero.

  • malloc() does not initialize the allocated memory, which may contain garbage values.

  • calloc() is slower than malloc() as it initializes all bits to zero.

  • malloc() is used when we need to allocate memory for a single varia...read more

Q2. work of VISA

Ans.

VISA is a global payments technology company that enables secure and convenient electronic payments.

  • VISA provides payment solutions for consumers, businesses, and governments worldwide.

  • VISA's network processes billions of transactions every year.

  • VISA offers a range of products and services, including credit and debit cards, prepaid cards, and mobile payments.

  • VISA works with merchants, financial institutions, and other partners to ensure secure and reliable payment processing....read more

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