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PREVIOUS YEAR SOLVED PAPERS MCQ - GATE 2019

36 Consider the following C function.
void convert(int n){
if(n<0)
printf(“%d”,n);
else {
convert(n/2);
printf(“%d”,n%2);
}
}
Which one of the following will happen when the function convert is called with any positive integer n as argument?

It will not print anything and will not terminate

37 Consider the following C program:
#include
int r(){
static int num=7;
return num--;
}
int main(){
for (r();r();r())
printf(“%d”,r());
return 0;
}
Which one of the following values will be displayed on execution of the programs? A

38 Consider three machines M, N, and P with IP addresses 100.10.5.2, 100.10.5.5, and 100.10.5.6 respectively. The subnet mask is set to 255.255.255.252 for all the three machines. Which one of the following is true?

N and P belongs to same subnet.
Hence, C is correct answer.

39 Suppose that in an IP-over-Ethernet network, a machine X wishes to find the MAC address of another machine Y in its subnet. Which one of the following techniques can be used for this?

X sends an ARP request packet with broadcast MAC address in its local subnet

40 Consider three 4-variable functions f₁, f₂, and f3, which are expressed in sum-of-minterms as
f₁ = Σ(0, 2, 5, 8, 14), f₂ = Σ(2, 3, 6, 8, 14, 15), f₃ = Σ (2, 7, 11, 14)
For the following circuit with one AND gate and one XOR gate, the output function f can be expressed as:

f₁ . f₂ = Σ(2, 8, 14)
f₁ = f₃⊕ (f₁ . f₂)
= Σ(7, 8, 11)

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Question:

A relational database contains two tables Student and Performance as shown below: Student Roll_no.Student_name1Amit2Priya3Vinit4Rohan5Smita Performance Roll_noSubject_codeMarks1A861B951C902A892C923C80 The primary key of the Student table is Roll_no. For the Performance…

A. 4
B. 5
C. 3
D. 6

Correct answer: B

Explanation:

Total 5 different student names all 5 group records in result. (In where condition no condition over Roll_no so query produces all groups.)

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