Past Paper 2025 12th Class Karachi Board Computer Science Objective (Science General Group)

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COMPUTER SCIENCE 2025

(Science General Group)

Option-I Programming using 'C'

TIME: 3 Hours (75 Marks)

SECTION 'A' (Multiple Choice Questions)(15)

NOTE: i) This section consists of 15 part questions and all are to be answered. Each part questions carries 1 mark.

ii) Do not copy the part questions in your answerbook. Write only the answer in full against the proper number of the question and its part.

1 Choose the correct answer for each from the given options:

(i) The rules/formats for using a programming language are called: *semantic *rule *syntax✓ *module

(ii) Variable and constant name cannot contains a(n): *Letter *Underscore *Period✓ *Number

(iii) This is a binary operator: *? *++ *-- *+✓

(iv) Every C-statement must be ends with: *Period *Comma *Colon *Semi colon✓

(v) The number of bytes used by "float" data type in C is: *2 *4✓ *6 *8

(vi) This functions is used to get input from the user: *printf() *scanf()✓ *clrscr() *puts()

(vii) a+= b is equivalent to: *b+= a *a = +b *a = a + b✓ *b = b + a

(viii) These are logical operators except: *&& *|| *! *>=✓

(ix) This function returns the length of the strings: *strcpy() *strcat() *stricon() *strlen()✓

(x) The escape sequence for new line is: *\a *\n✓ *\r *\f

(xi) This one is not a loop structure: *Switch ✓ *for *while *do-while

(xii) The symbol " = " represents: *comparison operator *Equal to operator *Assignment operator *Logical operator

(xiii) The array int marks [] = {500,700,600,800,900}, the marks [2] is: *500 *600✓ *700 *800

(xiv) This is the correct way to defined a pointer: *int_ptr x; *int*ptr;✓ *int+ptr; *int$ptr;

(xv) A loop that never ends is called: *Infinite loop✓ *Running loop *Nested loop *Continuous loop

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