Tag: programming languages

Questions Related to programming languages

How can we prevent a class from Instantiating?
technology programming languages

  1. Use Abstract class

  2. Use Private Constructor

  3. Both of the above

  4. Use Sealed class

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Correct Option: C

What is the difference between the S.ToString() and Convert.ToString(S) in the given scenario?
technology programming languages

  1. No difference

  2. S.ToString() handles null values

  3. Convert.ToString(S) handles null values

  4. I don't know.

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Correct Option: C

Can we invoke the garbage collector explicitly?
technology programming languages

  1. Yes, but the actual collection is not deterministic

  2. No.

  3. Yes, and the actual collection is deterministic

  4. I don't know.

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Correct Option: C

In the above code, the call to the factorial() throws StackOverflowException. Will the finally block gets executed and prints the "finally" message to the user?
technology programming languages

  1. Yes

  2. No

  3. May be

  4. I don't know

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Correct Option: B

Which of the following signifies implementation inheritance?
technology programming languages

  1. Public Inheritance

  2. Protected Inheritance

  3. Private Inheritance

  4. Virtual Inheritance

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Correct Option: C

What will be the output of the following code: main() { int a=10,b=20; a=a^b; b=a^b; a=a^b; cout<

technology programming languages

  1. 20,10

  2. 10,20

  3. 1,10

  4. 20,2

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Correct Option: A

static keyword can be used with virtual functions.
technology programming languages

  1. True

  2. False

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Correct Option: A

Which of the following describes the correct syntax for overloading new operator for arrays
technology programming languages

  1. new operator cannot be overloaded

  2. void *operator new(size_t,int);

  3. void operator new;

  4. void *operator new;

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Correct Option: D

Which of the following operators cannot be overloaded?
technology programming languages

  1. ~

  2. .*

  3. &

  4. ->*

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Correct Option: B

What is the problem,if any in the following code: struct Sample { int a; Sample() { a=0; } }; class Sample2:public Sample { }; struct Sample3:protected Sample2{};
technology programming languages

  1. nothing wrong will complie fine.

  2. class cannot inherit from struct

  3. struct cannot inherit from class

  4. struct cannot have constructor

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Correct Option: A