Fundamentals of

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Loops in C

Q.1 What is the final value of x when the code int x; for(x=0;x<=10;x++){} is run ?

(a)10 (b)9 (c)0 (d)11

_Q_{.2 W}_h_{en do}_e_s_t_he_pro_gr_am_f_o_l_l_o_wi_ng_w_h_i_l_e₍_x_<₁₀₀₎_{{ }}_e_x_ecu_t_e?

(a)When x is greater than 100

(c)when x is less than 100

(b)when x is greater than or equal to 100 (d)When x is less than or equal to 100

Q.3 Which of the following is not a loop statement in c?

⁽^a)re^p^e^a^t^uⁿ^t^il⁽^b⁾^d^o^w^h^ile^(c)w^h^ile⁽^d⁾^f^or
Q.4 Which of the following loops will definitely execute atleast once even if the condition is not satisfied

(a)for (b)while (c)do-while (d)None of the above

Q.5 What is the error in following code?

^If(^z⁼¹⁰⁰⁾

^P^riⁿ^tf⁽^“^z^is¹⁰⁰^”⁾

^(a)¹⁰⁰^should^be^writ^t^{en in}^d^o^ub^{le q}^uo^tatⁱ^oⁿ^{s in t}^h^e^fⁱ^rst^liⁿ^e

^(b)^v^arⁱ^a^b^{le z}^sh^o^u^ld^be^ins^id^e^d^o^ub^{le q}^u^o^tatⁱ^oⁿ^{s in}^{the first}^liⁿ^e

^(c^)Mⁱ^s^tak^e^{s in the}^e^qu^als^t^o^o^p^era^t^o^r

(d)There is no semicolon (;) at the end of first line

Q.6 Looping in a program means

(a)Branching to be specified branch or label in the program

^(b)repe^a^tiⁿ^g^a^gⁱ^v^{en s}^e^t^o^{f i}ⁿ^structⁱ^oⁿ

^(c)B^o^t^h^{of a}^b^ove

⁽^d⁾^N^oⁿ^e^{of a}^b^ove
Q.7 The difference between while and do-while statements is

(a)In the while statement the control first enters into the loop then condition is tested at the end of first

ⁱ^t^er^a^t^ion

^(b)In^do^w^hⁱ^l^e^the^c^o^nd^iti^oⁿ^is^t^e^s^t^e^d^{in fi}^r^s^tⁱ^t^eratⁱ^oⁿ^aⁿ^d^if^t^h^e^c^o^nd^itⁱ^oⁿ^is^tr^u^e^,it^eⁿ^t^ersⁱⁿ^t^o^t^h^e^l^o^o^p

^(c⁾^The^d^o^-whi^l^e^st^a^t^e^m^ent^’^{s c}^o^nd^itⁱ^o^{n is}^u^s^ed^t^o^d^e^ci^d^e^wh^e^ther^t^o^enter^t^h^e^l^oo^p^o^rⁿ^o^t^whereas^t^h^e^w^hⁱ^l^e

statement’s condition is used to decide whether to exit the loop or not

(d)The while statement’s condition is used to decide whether to enter the loop or not whereas the do-while

^stat^e^m^en^t^’s^c^o^nd^iti^oⁿ^is^u^s^{ed deci}^d^e^whet^h^er^t^o^e^x^it^t^h^e^l^o^o^p^o^{r n}^o^t
Q.8Which of the following is not a branching statement in C?

(a)exit (b)break (c)goto (d)switch

Q.9 Which of the following is a decision statement in C?

(a)if-else (b)switch-case (c)both a&b

(d)do-while

Q.10 Which of the following is a selection statement in C++?

⁽^a)for⁽^b⁾^s^wⁱ^t^c^h-^c^ase^(c)w^h^ile⁽^d⁾^do-^w^h^ile
Q.11 The continue statement is used to:

(a) resume the program when it is hanged

^(b)resu^m^e^t^h^e^p^r^o^g^r^a^m^if^a^break^s^tat^e^m^{ent is}^gⁱ^v^en

^(c⁾^skip^t^h^e^t^est^o^f^the^s^tat^e^m^ents^o^f^t^h^e^l^o^o^p^{in the}^c^u^rreⁿ^tⁱ^t^eratⁱ^oⁿ

⁽^d⁾ⁿ^oⁿ^e^o^f^th^e^a^b^ove
Q.12 Observe the following block of code and determine what happens when x=2?

^S^wⁱ^t^c^h^(x⁾

{

^Ca^s^{e 1}^p^riⁿ^t^f⁽^“x^is¹^”⁾

Break;

^Ca^s^{e 2:}

^Ca^s^e³^p^riⁿ^tf⁽^{“x is}³^”⁾

break;

^d^e^f^a^u^l^t^:

printf(”X is not within the range”)

}

(a)Program jumps to the end of switch statement since there is nothing to do for x=2 (b)The code inside default will run since there is no task for x=2,so

(c)Will display x is 3,and then come outside the switch statement

⁽^d⁾^N^oⁿ^e^{of a}^b^ove
Q 13 Which of the following is false for a “switch” statement in C?

(a)break statement is false is compulsory after each case

^(b)^d^efau^l^t^st^a^t^e^m^ent^is^c^o^m^pu^ls^o^r^y

^(c⁾^The^r^e^{is a}^li^mⁱ^t^oⁿ^t^h^e^m^axi^m^u^mⁿ^u^m^b^er^o^{f ca}^s^es

⁽^d⁾^N^oⁿ^e^of^t^h^e^a^b^ove
Q.14 Find the output of following code

#include Void main()

{

Int s=0; While(s++<10)

{

If(s>3 && s<10) Continue; Printf(“\n%d\t” s)

}

(a)1 2 3 4 5 6 7 8 9 (c)4 5 6 7 8 9 10

(b)1 2 3 10 (d)4 5 6 7 8 9

Q.15 Find the output of following c code?

#include Void main()

{

ⁱⁿ^t^a⁼²^;

ⁱ^f⁽^a==²⁾

{

a=a+2;

^p^riⁿ^tf⁽^“^%^d^”^a)

}

^Else

{

^B^r^e^a^k^;

}

(a)It will printing nothing (b)-3

Q.16 Find the output of the following c code

^#iⁿ^c^l^u^d^e^<^s^t^d^io.^h^>

^#iⁿ^c^l^u^d^e^<^s^t^rⁱⁿ^g.h>

^void^maⁱⁿ⁽⁾

{

int i=0; for(;i<=2;) printf(“%d” ++i)

}

(a)0 1 2 (b)1 2 3 (c)0 1 2 3 (d)Infinite loop

Q.17 Find the output of following c code

#include

^void^maⁱⁿ⁽⁾

{

Int x; For(x=1;x<=5;x++) printf(“%d” x)

}

^(a)1²³⁴⁵⁶⁽^b⁾⁶
Q 18 :ow many times “C” is get printed?

#include Void main()

{

^Int^x^;

^f^or(^x⁼⁰^;x<⁼¹⁰^;^x⁺⁺⁾

{

(d)5

If(x<5) Continue;

^Else

^b^r^e^a^k^;

^p^riⁿ^tf⁽^“C”)

}

⁽^a)⁵^tⁱ^m^es⁽^b⁾¹¹^tⁱ^m^es

⁽^d⁾¹⁰^tⁱ^m^es

Prepared By:- Mr. Pawar A. B.

³⁸

Q.19 Find the output of the following program

^#iⁿ^c^l^u^d^e^<^s^t^d^io.^h^>

^void^maⁱⁿ⁽⁾

{

ⁱⁿ^t^j⁼¹^;

^w^h^ile(j<⁼²⁵⁵⁾

{

}

^j++;

}

}

^p^riⁿ^t^f⁽^“^%^d^\n^”^j)

⁽^a)0^t^im^e^s^(b)2⁵⁴^tⁱ^m^es^(c)²⁵⁵^t^im^e^s^(d)2⁵⁶^tⁱ^m^es
Q.20 Find the output of the following program

#include

^void^maⁱⁿ⁽⁾

{

int i=0; for(;i<=5;i++); printf(“%d ” i)

}

(a)0,1,2,3,4,5 (c)1,2,3,4

(b) 5 (d) 6

Q.21 find the output of the following program

#include

^void^maⁱⁿ⁽⁾

{

int x=500,y=100,z; if(!x>=400) y=300;

^z⁼²⁰^0;

^p^riⁿ^tf(^“^y⁼^%^{d z}⁼^%d^\ⁿ^”^y^z)

}

(a)y=100 z=200

^(c)^y=1⁰⁰^z^=ga^r^b^age

(b) y=300 z=garbage

(d) y=300 z=200

Q.22 find the output of the following program

#include

^void^maⁱⁿ⁽⁾

{

int x=4; float y=4.0; if(x==y)

^p^riⁿ^tf(^“^x^aⁿ^d^y^a^r^e^eq^u^a^l^”⁾

^else

printf(“x and y are not equal”)

}

(a)x and y are equal (b) x and y are not equal

(c)Unpredictable (d) No output

Q.23 find the output of the following program

#include

^void^maⁱⁿ⁽⁾

{

float a=0.7; if(a==0.7) printf(“:i”) else printf(“:ello”)

}

⁽^a)^Hⁱ

(c)Hi Hello

⁽^b⁾^H^ello

(d) None of above

Q.24 find the output of the following program

#include

^void^maⁱⁿ⁽⁾

{

int i=5;

^w^h^ile(i^-^-^>⁼⁰⁾

printf(“%d ”i) printf(“\n”) while(i-- >=0) printf(“%i” i)

ⁱ⁼⁵^;

^p^riⁿ^tf⁽^“^\ⁿ^”)

^w^h^ile(i^-^-^>⁼⁰⁾

^p^riⁿ^tf⁽^“^%^d^”ⁱ⁾

^r^etu^rⁿ^0;

}

(a)4,3,2,1,0,-1 4,3,2,1,0,-1 (b)5,4,3,2,1,0 5,4,3,2,1,0 (c)Error

(d) 5,4,3,2,1,0 5,4,3,2,1,0 5,4,3,2,1,0

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