OOPS interview questions

The storage class controls

1. Scope of a variable
2. Life time of a variable
3. Both a and b
4. None of above

Which of the following is not a valid reason for using functions?

1. They use less memory than repeating the same code.
2. They keep different program activities separate.
3. They run faster.
4. They keep variables safe from other parts of the program.

The C language provides a way to access contents of a file from a program using

1. System calls
2. Library function
3. Both a and b
4. None of above

The continue statement is used to

1. Continue execution of the program error occurs.
2. Exit from the outermost block even it is used in the innermost block.
3. Exit the block of loop statement.
4. Continue the next iteration of the loop statement.

The operators exclusively used with pointers are

1. * and /
2. & and *
3. & and ^
4. * and +

A structure is a data type in which

1. Elements can be of different type.
2. Each element must have the same type.
3. Each element must be of pointer type.
4. None of above

Preprocessor does not which one of the following?

1. Macro expansion
2. Conditional compilation
3. Loading include file
4. Type checking

Which of the following statement is true about continue statement?

1. It can be used in conjunction with switch statement.
2. It terminates the loop.
3. It terminates the current iteration.
4. None of above

Union differs from structure in the following way

1. Only one member can be used at a time.
2. Unions cannot have more than two members.
3. Union initializes all members as structure.
4. All members are used at a time.

Which of the following statement is true about register storage class?

1. Variable always stored in processor registers.
2. Can only be used with integral data types and pointers.
3. Variable takes initial value 0 if not initialized.
4. None of above

Which of the following statement is a correct statement about typedef statement?

1. It is used to define a function.
2. It is used to re-define a existing or user defined data type.
3. It is primitive data type.
4. None of above

Which of the following function will you use in case you want to provide the password facility in your program for security purposes?

1. gets()
2. scanf()
3. getch()
4. getchar()

Which of the following function can be used to write only integer numbers

1. putw()
2. fwrite()
3. putint()
4. fprintf()

Which of the following statements is not true about floating point number to a string?

1. ftoa()
2. dtoa()
3. gcvt()
4. all of above

A bit field is of type

1. double
2. float
3. int
4. all of the above

The function ftell() returns

1. the middle position of the file
2. the current position of the file
3. the end position of the file
4. the beginning position of the file

Which of the following function can be used to read an entire array or a structure in a single call?

1. readblock()
2. READ()
3. read()
4. fread()

Arrays are always passed as arguments to a function by

1. depends on compiler optimization settings
2. depends on the number of arguments
3. value
4. reference

The function that allows a file to read randomly is

1. frandon()
2. rewind()
3. ftell()
4. fseek()

Which of the following is not a control statement in C language?

1. goto statement
2. switch statement
3. for statement
4. repeat until statement

Which of the following modifier is used to declare a variable as constant?

1. const
2. signed
3. short
4. unsigned

Which of the following string functions reverse the string?

1. strrev()
2. strcmp()
3. strlen()
4. strcpy()

Operand of indirection operator is

1. ordinary variable
2. integer constant
3. pointer variable
4. none of above

Which of the following statements are true about break statement?

1. The break statement terminates current iteration of the loop.
2. The break statement can be used with if statement to terminate the execution of its block.
3. The break statement can only be used with loop statements and switch statement.
4. None of above

Which of the following input function cannot be used to input multiword string in a single function call?

1. getche()
2. gets()
3. scanf()
4. None of above

Which of the following declarations is not correct?

1. unsigned float d;
2. unsigned char c;
3. int b = 4;
4. float a;

Which of the following operators has highest precedence?

1. *
2. /
3. %
4. All have same precedence

What is the file extension for font files?

1. txt
2. bgi
3. chr
4. font

Which of the following function can be used to write an entire array or a structure in a single call?

1. writeblock()
2. write()
3. fwrite()
4. WRITE()

File opening is a process of

1. Writing data to a file
2. Connecting program to a file
3. Reading data from a file
4. None of above