Question 1

What is the purpose of va_end?
A)Cleanup is necessary
B)Must be called before the program returns
C)Cleanup is necessary & Must be called before the program returns
D)None of the mentioned

Accepted Answer

Cleanup is necessary & Must be called before the program returns

Question 2

Which of the following is NOT a delimiter for an input in scanf?
A)Enter
B)Space
C)Tab
D)None of the mentioned

Accepted Answer

In the context of the scanf function in C programming, Enter, Space, and Tab are all considered delimiters. They are used to separate inputs. Therefore, all of the mentioned options are actually delimiters, making "None of the mentioned" the correct choice.

Question 3

If the conversion characters of int d, i, o, u and x are preceded by h, it indicates?
A)A pointer to int
B)A pointer to short
C)A pointer to long
D)A pointer to char

Accepted Answer

When the conversion characters for integers (d, i, o, u, x) are preceded by 'h', it indicates that the corresponding argument is a pointer to a short int, not a standard int. This is used in formatted input/output functions like printf and scanf in C to specify the type of the variable being dealt with.

Question 4

Which of the following doesn't require an & for the input in scanf()?
A)char name[10];
B)int name[10];
C)float name[10];
D)all of the mentioned

Accepted Answer

When using scanf() to read a string into a character array, the name of the array (e.g., name in this case) acts as a pointer to its first element, so you don't need to use the & operator. For other types like int and float arrays, you do need to use & to specify the address of the element being read.

Question 5

Which of the following is an invalid method for input?
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

Accepted Answer

The answer of Which of the following is an invalid...

Question 6

Which of the following represents the function for scanf()?
A)void scanf(char *format, …)
B)int scanf(char *format, …)
C)char scanf(int format, …)
D)char *scanf(char *format, …)

Accepted Answer

The function scanf() returns an integer value, which represents the number of input items successfully matched and assigned.

Question 7

What does scanf() function return?
A)Number of successfully matched and assigned input items
B)Nothing
C)Number of characters properly printed
D)Error

Accepted Answer

The scanf() function returns the number of input items successfully matched and assigned, which can be used to check for input errors.

Question 8

The conversion characters d, i, o, u, and x may be preceded by h in scanf() to indicate?
A)A pointer to short
B)A pointer to long
C)Nothing
D)Error

Accepted Answer

The conversion characters d, i, o, u, and x when preceded by h in scanf() indicate that the corresponding argument is a pointer to a short int. This modifier is used to read short integers from input.

Question 9

The syntax of printf() function is printf("control string", variable list) ;what is the prototype of the control string?
A)%[flags][.precision][width][length]specifier
B)%[flags][length][width][.precision]specifier
C)%[flags][width][.precision][length]specifier
D)%[flags][.precision][length][width]specifier

Accepted Answer

The correct prototype for the control string in printf() is %[flags][width][.precision][length]specifier.

Question 10

The parameter control string in the printf () is a C String that contains text to be __________
A)taken from a standard output device
B)written on to the standard output device
C)received from the standard output device
D)nothing can be said

Accepted Answer

The parameter control string in the printf() function contains text and format specifiers that dictate how subsequent arguments (if any) are formatted and displayed on the standard output device, typically a screen.

Question 11

Output justification such as decimal point, numerical sign, trailing zeros or octal are specified.
A)specifier
B)flags
C)precision
D)decimal

Accepted Answer

Flags in formatting specify how the output should be justified, including details such as decimal points, numerical signs, trailing zeros, or octal formatting.

Question 12

What symbol is used to Left-justify within the data given field width?
A)-(minus sign)
B)+(plus sign)
C)#
D)0

Accepted Answer

The minus sign (-) is used to left-justify within the specified field width in formatting strings.

Question 13

What specifies the minimum number of characters to print after being padded with zeros or blank spaces?
A)flags
B)length
C)width
D)precision

Accepted Answer

The width specifier in formatting operations specifies the minimum number of characters to print, and it can result in padding with zeros or blank spaces if the number to be printed is smaller than the specified width.

Question 14

The maximum number of characters to be printed is specified by __________
A)precision
B)width
C)length
D)flags

Accepted Answer

Precision specifies the maximum number of characters to be printed from a string, or the number of digits after the decimal point for floating-point numbers.

Question 15

________is used to define the type and the interpretation of the value of the corresponding argument.
A)precision
B)specifiers
C)flags
D)decimal

Accepted Answer

Specifiers are used to define the type and the interpretation of the value of the corresponding argument in formatting strings, such as in printf or scanf functions in C programming, or with format strings in various other programming languages.

Question 16

A conversion specification %7.4f means ____________
A)print a floating point value of maximum 7 digits where 4 digits are allotted for the digits after the decimal point
B)print a floating point value of maximum 4 digits where 7digits are allotted for the digits after the decimal point
C)print a floating point value of maximum 7 digits
D)print a floating point value of minimum 7 digits where 4 digits are allotted for the digits after the decimal point

Accepted Answer

The conversion specification %7.4f means printing a floating point value with a total width of 7 characters, including the decimal point, where 4 digits are allotted for the digits after the decimal point.

Question 17

Choose the correct description for control string %-+7.2f.
A)- means display the sign, + means left justify, 7 specifies the width and 2 specifies the precision
B)- means left justify, + means display the sign, 7 specifies the width and 2 specifies the precision
C)- means display the sign, + means left justify, 7 specifies the precision and 2 specifies the width
D)- means left justify, + means display the sign, 7 specifies the precision and 2 specifies the width

Accepted Answer

In the control string %-+7.2f, the '-' character specifies left justification, the '+' character indicates that the sign should always be shown (for both positive and negative numbers), '7' specifies the minimum width of the printed number, and '2' specifies the number of digits to appear after the decimal point, defining the precision.

Question 18

What error is generated on placing an address operator with a variable in the printf statement?
A)compile error
B)run-time error
C)logical error
D)no error

Accepted Answer

The answer of What error is generated on placing an...

Question 19

If by mistake you specify more number of arguments, the excess arguments will ____________
A)be ignored
B)produce compile error
C)produce run-time error
D)produce logical error

Accepted Answer

Excess arguments are ignored in many programming languages, meaning they do not affect the program's execution.

Question 20

What happens when zero flag is used with left justification?
A)data is padded with zeros
B)zero flag is ignored
C)data is padded with blank spaces
D)will give error

Accepted Answer

When zero flag is used with left justification, the zero flag is ignored because left justification automatically pads the output with blank spaces on the right, making the use of a zero flag irrelevant or contradictory to the formatting intention.

Quiz 2: Managing Io Operations

What is the purpose of va_end?

Which of the following is NOT a delimiter for an input in scanf?

If the conversion characters of int d, i, o, u and x are preceded by h, it indicates?

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

Which of the following is an invalid method for input?

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

What does scanf() function return?

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

The syntax of printf() function is printf("control string", variable list) ;what is the prototype of the control string?

The parameter control string in the printf () is a C String that contains text to be __________

Output justification such as decimal point, numerical sign, trailing zeros or octal are specified.

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

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

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

________is used to define the type and the interpretation of the value of the corresponding argument.

A conversion specification %7.4f means ____________

Choose the correct description for control string %-+7.2f.

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

If by mistake you specify more number of arguments, the excess arguments will ____________

What happens when zero flag is used with left justification?