UGC NET Computer || Free Quiz || Feb 2023

How many 2-digit numbers greater than 40 can be formed by using the digits 1, 2, 3, 4, 6, 7 when repetition is allowed ?

Which of the following command is used to update access and modification times of a file?

How many subsets of {1, 2, 3, ....10} contain at least 7 elements ?

Given R→ R+R|RR|R*|a|b|c and the string W = a+bc. What can you say abou the ambiguity of the grammar?

What is the output of the following JAVA program?

class simple

{

public static void main(String[ ] args)

{

simple obj = new simple( );

obj.start( );

}

void start( )

{

long [ ] P= {3, 4, 5};

long [ ] Q= method (P);

System.out.print (P[0] + P[1] + P[2]+":");

System.out.print (Q[0] + Q[1] + Q[2]);

}

long [ ] method (long [ ] R)

{

R [1]=7;

return R;

}

} //end of class