Question 1

Which of the following function with ellipsis are illegal?

Accepted Answer

A) void func(…); 
B) void func(int, …); 
C) void func(int, int, …); 
D) none of the mentioned

Question 2

Which header file includes a function for variable number of arguments?

Accepted Answer

A) stdlib.h 
B) stdarg.h 
C) ctype.h 
D) both stdlib.h and stdarg.h

Question 3

The syntax of the scanf() is scanf("control string ", arg1,arg2,arg3,….,argn); the prototype of control string is ____________

Accepted Answer

A) [=%[width][modifiers]type=] 
B) [=%[modifiers][width]type=] 
C) [=%[width] [modifiers]] 
D) [width][modifiers]

Question 4

The standard header _______ is used for variable list arguments (…) in C.

Accepted Answer

A)  
B)  
C)  
D)

Question 5

What is the use of symbol * in the control string as shown [=%[*][width] [modifiers] type=]?

Accepted Answer

A) * is optional and used when the data should be read from the stream but ignored 
B) * is not optional, used to read data from the stream but it is not ignored 
C) * is not optional, it is used to read data stream but ignored 
D) * is optional and used to read data from stream but it is not ignored

Question 6

What happens when zero flag is used with left justification?

Accepted Answer

A) data is padded with zeros 
B) zero flag is ignored 
C) data is padded with blank spaces 
D) will give error

Question 7

What error is generated on placing an address operator with a variable in the printf statement?

Accepted Answer

A) compile error 
B) run-time error 
C) logical error 
D) no error

Question 8

Which of the following macro extracts an argument from the variable argument list (ie ellipsis) and advance the pointer to the next argument?

Accepted Answer

A) va_list 
B) va_arg 
C) va_end 
D) va_start

Question 9

What is the value of EOF?

Accepted Answer

A) -1 
B) 0 
C) 1 
D) 10

Question 10

Which of the following doesn't require an & for the input in scanf()?

Accepted Answer

A) char name[10]; 
B) int name[10]; 
C) float name[10]; 
D) all of the mentioned

Question 11

The maximum number of characters to be printed is specified by __________

Accepted Answer

A) precision 
B) width 
C) length 
D) flags

Question 12

The conversion characters d, i, o, u, and x may be preceded by h in scanf() to indicate?

Accepted Answer

A) A pointer to short 
B) A pointer to long 
C) Nothing 
D) Error

Question 13

Which of the following represents the function for scanf()?

Accepted Answer

A) void scanf(char *format, …) 
B) int scanf(char *format, …) 
C) char scanf(int format, …) 
D) char *scanf(char *format, …)

Question 14

What specifies the minimum number of characters to print after being padded with zeros or blank spaces?

Accepted Answer

A) flags 
B) length 
C) width 
D) precision

Question 15

What symbol is used to Left-justify within the data given field width?

Accepted Answer

A) -(minus sign) 
B) +(plus sign) 
C) # 
D) 0

Question 16

Which of the following is an invalid method for input?

Accepted Answer

A) scanf("%d%d%d",&a, &b, &c); 
B) scanf("%d %d %d", &a, &b, &c); 
C) scanf("Three values are %d %d %d",&a,&b,&c); 
D) none of the mentioned

Question 17

What are the Properties of the first argument of a printf() functions?

Accepted Answer

A) It is defined by a user 
B) It keeps the record of the types of arguments that will follow 
C) There may no be first argument 
D) None of the mentioned

Question 18

What will be the output for the given code printf("
 The number is %07d",1212);

Accepted Answer

A) The number is 0001212 
B) The number is 1212 
C) The number is 1212. 
D) The number is 1212000

Question 19

Each call of va_arg _______

Accepted Answer

A) Returns one argument 
B) Steps va_list variable to the next 
C) Returns one argument & Steps va_list variable to the next 
D) None of the mentioned

Question 20

What is the meaning of the following C statement? scanf("%[^
]s", ch);

Accepted Answer

A) read all character except new line 
B) read all characters 
C) read only new line character 
D) syntax error

Exam 2: Managing Io Operations