Languages [TCS Placement]: Sample Questions 13 - 15 of 131

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Question 13

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Describe in Detail

Essay▾

What are reserved words?

Explanation

  • Reserved words are that are part of the standard C language library.
  • Reserved words have special meaning and cannot be used for purposes other than what they are originally intended.
  • Examples of reserved words are int, void, and return.
Given the Image is Define the C Keyword or Reserved Word

Question 14

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Write in Short

Short Answer▾

What is the benefit of using an enum rather than #define constant?

Explanation

  • The use of an enumeration constant (enum) has many advantages over using the traditional symbolic constant style of #define.
  • These advantages include a lower maintenance requirement, improved program readability, and better debugging capability.
    • Enumerated constants are generated automatically by the compiler. Conversely, symbolic constants must be manually assigned values by the programmer.
    • Enumeration constant makes programs more readable and thus can be understood better.

Question 15

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Write in Short

Short Answer▾

Which bit wise operator is suitable for checking whether a particular bit is on or off?

Explanation

The bitwise AND operator. Here is an example:

  1. enum
  2. {
  3.     KBit0 =1,KBit1,…..…KBit31,
  4. };if ( some_int & KBit24 )printf (“Bitnumber24isON”);elseprintf (“Bitnumber24isOFF”);

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