Quick Refresher Q/A: Programming Basics

1. A pointer is the name given to the memory, allocated by the runtime to hold the data.
2. A pointer contains user data.
3. A pointer is a variable, which contains a memory address as its data.
4. None of the above.

Answer - 3

Question 8. Which of the following is true about the “scope of a variable”? (more than one can be correct)

1. Scope means that the variable will be visible outside the program or the code block in which it is declared.
2. Scope means that the variable will not be visible outside the code block in which it is declared.
3. Once a variable goes out of the scope, it remains in the memory till the program is terminated.
4. Once a variable goes out of the scope, it is destroyed (i.e., removed from memory).

Answer - 2 & 4

Question 9. Which of the following is true for a function? (more than one can be correct)

1. A function is strictly a program.
2. A function is a named block of the code, which can be executed (called), whenever required.
3. A function may or may not return a value.
4. A function must always return a value.

Answer - 2 & 4

Question 10. What is meant by “passing a variable by reference”?

1. It means passing a copy of the variable to the calling function or the method.
2. It means passing the address of the variable to the calling function or the method.
3. It means creating a new variable, using this variable and then passing the new variable.
4. None of the above.

Answer - 2

Question 11. What is the difference between the logical ‘AND’ and bit-wise ‘AND’ operators?

1. They are the same.
2. Bit-wise ‘AND’ is used for testing a true/false condition, whereas logical ‘AND’ is used to mask the value of a variable with that of the another variable.
3. Logical ‘AND’ is used for testing true/false condition, whereas bit-wise ‘AND’ is used to mask the value of a variable with that of the another variable.
4. None of the above.

Answer - 3

Question 12. Which of the following type of class allow only one object to be created?

1. Friend Class.
2. Singleton Class.
3. Abstract Class.
4. None of the above.

Answer - 2

Question 13. Which of the following concepts determines at the runtime and is a method to invoke?

1. Polymorphism.
2. Data Hiding.
3. Dynamic Loading.
4. Dynamic Binding.

Answer - 4

Question 14. A computer system that permits the multiple users to run the programs at the same time is called?

1. Multi-tasking System.
2. Real time System.
3. Time Sharing System.
4. Multi-programming System.

Answer - 1

Question 15. SQL stands for.

1. Simple Querying Language.
2. Structured Querying Language.
3. Simplified Query Language.
4. Structured Query Language.

Answer - 4