printf() and scanf() | C Programming Questions and Answers | C Programming Free Online-Tests | LucentBlackBoard

01.

The statement which prints out the value of the integer variable sum, is

A.	printf("%s", sum);	B.	print("%i", sum);
C.	printf("%d", sum);	D.	printf("%d", &sum);

Answer and Explanation

Answer: printf("%d", sum);

Explanation:
There is no explanation...

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02.

The statement which prints out the text string "Welcome", followed by a newline, is.

A.	printf("Welcome\n");	B.	printf("Welcome\n");
C.	printf(Welcome\n);	D.	printf('Welcome', '\n');

Answer and Explanation

Answer: printf("Welcome\n");

Explanation:
There is no explanation...

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03.

The statement which prints out the value of the character variable letter, is

A.	printf(letter);	B.	printf("%c", &letter);
C.	printf("%c", &letter);	D.	printf("%c", letter);

Answer and Explanation

Answer: printf("%c", letter);

Explanation:
There is no explanation...

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04.

The statement which prints out the value of the float variable discount, is

A.	printf("%s", discount);	B.	printf("%s", discount);
C.	printf("%f", discount);	D.	printf("%d", discount);

Answer and Explanation

Answer: printf("%f", discount);

Explanation:
There is no explanation...

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05.

The statement which prints out the value of the float variable dump using two decimal places, is

A.	printf("%f", dump);	B.	printf("%.2f", dump);
C.	printf("%2f", dump);	D.	printf("%f", &dump);

Answer and Explanation

Answer: printf("%.2f", dump);

Explanation:
There is no explanation...

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06.

The statement to read a decimal value from the keyboard, into the integer variable sum, is

A.	scanf("%d", &sum);	B.	scanf("%d", &sum);
C.	scanf("%s", sum);	D.	scanf("%f", &sum);

Answer and Explanation

Answer: scanf("%d", &sum);

Explanation:
There is no explanation...

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07.

The statement to read a float value into the variable discount_rate is

A.	scanf("%f", discount_rate);	B.	scanf("%d", &discount_rate);
C.	scanf(discount_rate);	D.	scanf("%f", &discount_rate);

Answer and Explanation

Answer: scanf("%f", &discount_rate);

Explanation:
There is no explanation...

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08.

The statement to read a single character from the keyboard into the variable operator, skipping leading blanks, tabs and newline characters, is

A.	scanf("%s", operator);	B.	scanf("%c", &operator);
C.	scanf(" %c", &operator);	D.	scanf(" %c", operator);

Answer and Explanation

Answer: scanf(" %c", &operator);

Explanation:
The leading space before the modifier %c informs scanf() to skip leading whitespace characters.

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09.

What will be the output of the following program?
main()
{
printf(3+"SoftLucent"+4);
}

A.	Compilation Error	B.	skills
C.	kills	D.	ls

Answer and Explanation

Answer: ls

Explanation:
SoftLucent is a constant string and statement
printf(3+"SoftLucent"+4); will skip seven(3 + 4) characters of the string before printing.

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10.

What will be the output of the following program?
main()
{
printf("%c","SoftLucent"[4]);
}

A.	Compilation Error	B.	P
C.	i	D.	l

Answer and Explanation

Answer: i

Explanation:
SoftLucent is a constant string and character at index 4 will get printed.

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