TCS Papers: Sample Questions 456 - 457 of 502

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Question number: 456

» Languages » C & C Plus Plus



For automatic objects, constructors and destructors are called each time the objects


Choice (4) Response


Are constructed


Enter and leave scope


Inherit parent class


Are destroyed




  • For automatic objects, constructors and destructors are called each time the objects enter and leave scope

  • Automatic variables are those, which exist only within the scope where they are declared- typically allocated on stack

  • Constructor and destructors are called implicitly by the compiler.

  • The order in which these function calls occur depends on the order in which execution enters and leaves the scopes where the objects are instantiated.

  • Constructor for an automatic local object is called when execution reaches the point where that object is defined the corresponding destructor is called when execution leaves the object’s scope.

  • Constructor and destructor for automatic objects are called each time execution enters and leaves the scope of the object.

  • Destructors are not called for automatic objects if the program terminates with a call to function exit or function abort.

Question number: 457

» Basic CS » Networks

Essay Question▾

Describe in Detail

Expand IDEA?


  • IDEA stands for International Data Encryption Algorithm- encryption algorithm developed at ETH in Zurich, Switzerland which uses a block cipher with a key, and is considered very secure. As a block cipher, it is also symmetric

  • It was described in 1991.

  • No practical attacks have been published despite of a number of attempts.

  • IDEA is patented in the United States and in most of the European countries.

  • Encryption and Decryption are identical as in DES.

  • The algorithm was replacement for the data encryption standard.

  • IDEA is a minor change of an earlier cipher PES (proposed encryption standard)

  • IDEA was originally called IPES (improved proposed encryption standard)

International data encryption algorithm

International Data Encryption Algorithm

International data encryption algorithm